An overview and functional description of an editor for host files using Direct View Storage Tubes (DVST) with enhanced refresh capabilities is given. Tekedit is an editor designed to augment a system editor for creating or modifying host files using a graphics terminal as the display device. The initial implementation of Tekedit is for a Tektronix 4114 on an IBM 4341 running VM/CMS.
Topics: DTIC Archive, Johnson, M, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
The objective of this study was to develop a systematic procedure for pinpointing areas for future funding requests aimed at improving production methods. The approach taken was to describe current manufacturing processes in terms of the functions they performed, thus allowing assessment of costs without reference to the methods employed. Such 'technology-independent' assessment allowed cost comparison both within and among end items, thereby highlighting the high-cost functions.
Topics: DTIC Archive, Goodheim, Harold, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Although process planning is more of an art than a science today, its automation is both possible and feasible. Variant computer aided systems exist and can be applied now. These systems should not have a great effect upon organizational structure. Generalized generative process planning does not exist and probably will not in the near future. However, several special purpose generative systems are available in experimental form. The capabilities of these systems must be planned during the...
Topics: DTIC Archive, Olson, W W, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
This report details the engineering design, development and application of equipment to produce step threads (constant lead thread on two or more diameters) on the breechblock of cannon. The equipment uses a blade type tool with the part being threaded through shaper type cuts until finish size is reached. The use of this equipment will reduce the floor to floor time from 7.5 hours to 2.0 hours while producing better thread finishes and more accurate dimensional sizes.
Topics: DTIC Archive, Rose, C, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Most of the earlier results for residual stresses are based on the assumption of elastic unloading. In this report, the prediction of residual stresses for the case of reverse yielding including the combined Baushinger and hardening effect will be reported for an autofrettaged thick-walled cylinder. The Bauschinger effect factor is varying as a function of overstrain. The strain-hardening effect is considered with different parameters used for loading and unloading process. The new results...
Topics: DTIC Archive, Chen, P C, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Several series of fracture toughness measurements were made in 4340 type steels, using both the standard K(Ic) test method and the J(Ic) test method described by Landes and Begley. K(Ic) results and J(Ic) results converted to K(Ic) units are nearly identical for a given steel over a range of specimen size. The fracture toughness of steels produced by vacuum-degassing, remelt, and airmelt processes are compared over a range of yield stress. Simplified J(Ic) test procedures are suggested for use...
Topics: DTIC Archive, Underwood, John H., ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A recommended practice for preparation and evaluation of steel specimens for automatic inclusion assessment was developed. The polishing procedure involved the use of diamond abrasives on rotating paper laps. This technique preserved the true morphology of the non-metallic inclusions. Evaluation of a properly prepared sample was accomplished using the sensitive tint condition of Differential Interference Contrast Microscopy.
Topics: DTIC Archive, Brassard, Theresa V, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY...
The main purpose of this report is to examine and tie together a number of separate ideas about superconductivity in the Pd-M-H systems (where M is a metal, particulary a noble metal), and define areas of critical experimentation to tests these ideas.
Topics: DTIC Archive, Gray, D M, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
The effect of the area of interconnection between the ends of fast-acting bearings such as those of recoil mechanisms used with American tank guns was studied with an apparatus which simulated a concentric recoil system. It was studied with an apparatus which simulated a concentric recoil system. It was found that these bearings do not starve with a small interconnection area, but a larger area would probably produce a faster-acting bearing. It would also result in a thinner fluid film but this...
Topics: DTIC Archive, Montgomery,R S, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
This report reviews two new recoil systems as possible replacements for the conventional mechanisms currently in use on medium and large size cannon. One uses compressible fluid to dissipate energy in viscous friction and store elastic energy for counter recoil. The other uses coulomb or dry friction for dissipation of the recoil energy.
Topics: DTIC Archive, Sneck, H. J., ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
The transit time for passage of longitudinal and shear ultrasonic waves through polycrystalline depleted uranium - .78 weight percent titanium (Ti) alloy was determined as a function of pressure in a hydrostatic medium. Specimens of two thicknesses were used in order to eliminate bond-transducer effects from transit time determinations. The longitudinal velocity vL increases 3.5 percent from one atmosphere to a value of 3.48 km/sec at 1.6 GPa; the shear velocity vs increases 5 percent to 2.08...
Topics: DTIC Archive, Frankel, J, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Machinability date bases are discussed with respect to content, form and methods. Machinability data is needed to implement the factory of the future. Therefore, data sources and current formulas are featured in addition to formation of structures.
Topics: DTIC Archive, Olson,Walter W, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
The effects of a water, oil and 400 F salt quench upon mechanical properties and microstructure of a 2-in. thick block of gun steel were studied. The 400 F salt quench was found to be the mildest quenchant. The water and oil quenching effects were compared to the empirical predictions of Grossman with good qualitative agreement.
Topics: DTIC Archive, Niccolls, E H, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
This is a compilation of Benet Weapons Laboratory technical reports published during 1984.
Topics: DTIC Archive, Neifeld,R D, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Many ductile metals in intimate contact with thin coatings of low melting solid metal which exhibit liquid metal embrittlement, also manifest severe embrittlement when tested at temperatures below the melting point of the coating. A significant decrease in stress, strain, and reduction-in-area occurs at fracture. Fracture propagates fast, but at a rate which is one or two orders of magnitude slower than that in liquid metal environments. Fracture occurs by brittle intergranular or...
Topics: DTIC Archive, Kamdar,M H, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
Wide range algebraic expressions for the displacement of cracked fracture mechanics specimens are developed. For each specimen two equations are given: one for the displacement as a function of crack length and the other for crack length as a function of displacement. All of the specimens that appear in ASTM Standard E-399 are represented in addition to the crack mouth displacement for a pure bending specimen. For the compact tension sample and the disk-shaped compact tension sample, the...
Topics: DTIC Archive, Kapp, J A, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
This report describes three areas of the production line in manufacture of gun tubes that, with improvement, would be beneficial to gun tube manufacture by automation. The purpose of the project was to highlight and improve these areas to result in an improved gun tube manufacturing facility.
Topics: DTIC Archive, LaRoss, C, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
The shortcomings encountered with conventional high contraction chromium coatings in gun bores during past investigations are reviewed. Changes in the application of chromium for improving its performance during firing are proposed. Recent developments on the application of low contraction chromium with a new plating process, effects of partially plated bores on accuracy, and the effects of rifling profile on the wear of chromium coatings are discussed.
Topics: DTIC Archive, Greco, V P, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
In Technical Report WVT-TR-75054 on cold rotary forging of rifling into a thin-wall gun tube, it was stated that the yield strength of the forged material increased in the longitudinal direction, while a recoverable loss was observed in the tangential (hoop) direction. A recently obtained metallographic study of the same material suggests a potential improvement in fatigue life and/ or fracture toughness of the material, attained in that earlier work but overlooked at the time.
Topics: DTIC Archive, Avitzur, Boaz, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
The effect of interrupted current (IC) plating on the visual crack morphology, crystallography, and residual stresses of electrodeposited chromium has been investigated. Varying the process parameters such as the on/off plating cycle and current density resulted in changing the crystallographic fiber texture of the deposit from the conventional 111 orientation to a combination of 211, 111, and a small fraction of randomly oriented crystallites. Under these plating conditions, it was also found...
Topics: DTIC Archive, Capsimalis,G P, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
When an otherwise homogeneous material under stress contains small defects (i.e., internal cracks and/or voids), the stresses at parts of the material-defect interface significantly exceed the ones anticipated at that location in the absence of such irregularities. Consequently, a structural member, otherwise calculated to safely sustain the applied loads, might unpredictably fail. That branch of engineering which intends to account for such 'stress-raisers' is known as fracture mechanics....
Topics: DTIC Archive, Avitzur,B, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistent with the existence of superconducting regions in the specimens at this temperature.
Topics: DTIC Archive, Homan, C G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
This is a compilation of Benet Weapons Laboratory technical reports published during 1983.
Topics: DTIC Archive, Neifeld, R D, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Pressure quenched cadmium sulfide (CdS) containing chlorine (Cl) has been shown previously to exhibit both very large diamagnetism and paramagnetism. The diamagnetism observed at 77K approached Meissner proportion and suggested superconducting like behavior in this material. The effect is known to depend sensitively on the Cl content of the starting material. This report describes the results of a survey of the magnetic behavior of pressure quenched samples prepared from CdS systematically...
Topics: DTIC Archive, Cote, P J, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
This is a compilation of technical reports published during 1979.
Topics: DTIC Archive, Neifeld, R D, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A study has been made of the fracture behavior of single-edge notched specimens of 4340 type steel tested in cyclic fatigue at temperatures ranging from 675 F to 1350 F in high purity lead and antimony and liquid lead containing 5 to 75 percent antimony in solution. The susceptibility to embrittlement by liquid lead decreases with temperature. The fracture mode changes from intergranular at low temperatures to ductile at 1200 F. In lead solutions, at low temperatures (700 F) and low...
Topics: DTIC Archive, Kamdar,M H, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Gun erosion is a complicated process which involves a number of interrelated factors. There is general agreement that erosion is a function of bore temperature but this does not eliminate controversy about its causes or the relative importance of different factors. The three effects involved in gun erosion are thermal, chemical, and mechanical. In the case of the most important erosion, that of steel bores at the origin-of-rifling, the chief factor is probably thermal. However, no matter what...
Topics: DTIC Archive, Montgomery, R. S., ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
Finite element solution formulations have been carried out for a simple initial value problem based on two different variational statements; that of convolutional integral developed by Gurtin and that of large spring constants adapted by this writer for initial value problems. Numerical results indicate that both generate convergent solution to the given initial value problem of a spring-mass system subjected to a harmonic forcing function.
Topics: DTIC Archive, Wu, Julian J, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A bore erosion gage developed earlier (Krupski and Audino, WVT (1977) ) for monitoring the coating thickness and erosion of the 105 mm M68 in the region up to 40 inches from the origin of rifling has been modified, and the problem of the lack of responsibility of radius measurements along the bore circumference has been successfully eliminated. Test data and statistical analysis of the results have demonstrated that the modified gage can measure the relative change in the bore radius with an...
Topics: DTIC Archive, Capsimalis, G, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
An engineering survey relative to the problems associated with split ring manufacturing was undertaken. The results of this effort are as follows: (1) Kinking: A hydraulically operated kinking machine has been built in-house. Initial testing is promising. Modification and refinements to this unit are continuing. (2) Splitting the Ring: The feasibility of splitting the ring using an electrical discharge machine 'EDM' was investigated. A service contract for EDM cutting employing a traveling wire...
Topics: DTIC Archive, DeMeo, Rocco S, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
A round, disk-shaped specimen is proposed as a standard K sub Ic test specimen for addition to ASTM Method E-399. The specimen is diametrically cracked, and it is loaded in the same general way as the existing standard compact specimen. Test and analyses are described which were performed to verify that the proposed round compact specimen and associated K solution are appropriate for a standard K sub Ic test. The use of the round compact specimen for other fracture tests is described.
Topics: DTIC Archive, Underwood, J H, ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE...
