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Development of lightweight hydrides. Annual task report, August 1978-September 1978

Description: The results of the first years effort to develop lightweight hydrides for automotive storage of hydrogen are described. A test fixture to subject a magnesium alloy hydride to hundreds of hydriding cycles has been designed and is being constructed. Extensive testing of the magnesium lithium and magnesium aluminum alloy hydrides has been performed. Several alloys demonstrate significantly higher hydrogen dissociation pressures than the baseline alloy Mg/sub 2/Ni-Mg. No alloy has yet demonstrated … more
Date: October 1, 1979
Creator: Rohy, David A. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 4

Description: Resistivity was studied as a function of time for isothermally annealed Al --Fe alloys (13.6- and 13.9-Alfenol). Stress-strain relationships were determined for Al -- Fe alloys of nearly perfect Fe/sub 3/Al order, complete disorder, and intermediate degrees of order. (See also TID-6566.) (C.J.G.)
Date: September 1, 1960
Creator: Rauscher, G. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Dutility of Iron-Aluminum Alloys. Monthly Report No. 6

Description: Research on the effects of variations of aluminum content, heat treatment, and basic slip mechanism on the ductility of Al--Fe alloys is reported. Data from tensile tests on 13.9-Alfenol specimens are tabulated and test techniques are discussed along with the results. In addition, the preparation of a series of iron alloy buttons containing Al and various quantities of Mo is reported. Hot and warm rolling of these buttons is discussed. Data on resistivity of the iron alloy containing 13.9% Al a… more
Date: October 1, 1959
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 7

Description: The objective of the program is to determine the effect of variations of Al content, heat treatment, and basic slip mechanism upon the room temperature ductility of Fe - Al alloys. Additional heat treatment studies on 13.9 Alfenol tends to confirm earlier observations that reproducibility of ductility values of 8 to 9% are difficult to obtain. The preparation of Al - Y - Fe, and Al - Mo - Y - Fe alloys by arc melting in a non-consumable electrode arc furnace is reported. A resistivity versus te… more
Date: November 10, 1959
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report for March 15, 1959 to April 30, 1960

Description: Studies designed to correlate iron-aluminum alloy microstructure and heating variables with tensile properties were continued through the report pericd. All specimens were electropolished prior to tensile testing. Results are presented tabularly. (For preceding period see TID-6564.) (auth)
Date: April 1, 1960
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 2

Description: A series of isothermal heat treatments was performed on the highly ordered Al- Fe alloy, 13.6 Alfenol. Resistivity vs. time curves are presented for temperatures of 0 to 700 deg C. (For preceding period see TM-5730.) (C.J.G.)
Date: July 13, 1960
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 9 for March 15, 1959 to March 15, 1960

Description: Initial heat-treatment studies are reported in which the effects of quenching rate upon room temperature ductility of iron-aluminum alloys were investigated. Quenching media included bciling water, oil at room temperature, and oil at 100 deg C. Experimental results are tabulated. No definite trends in tensile properties were observed with differences in quenching rate. Electropolishing techniques for use in preparation of specimens are discussed in relation to determination of microcrack effect… more
Date: January 11, 1960
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 11 for March 15, 1959 to March 15, 1960

Description: Experiments were continued in which the effect of microstructure variation on the mechanical properties of iron-aluminum alloys was studied. Results of tensile tests are tabulated. Discussions of procedures and results are also included. (For preceding period see TID-6563.) (J.R.D.)
Date: March 1, 1960
Creator: Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 1, June 1, 1961-November 30, 1961

Description: Studies are being made on the effects of variation of aluminum content, heat treatment, surface preparation, and other metallurgical factors on the room temperature ductility of Al-- Fe alloys. The variation of Fe/sub 3/Al order as a function of temperature for 13.9 Alfenol was redetermined under constant instrumental conditions. The variation of the electrical resistivity of the three alloys under consideration with temperature on slow cooling is illustrated. An anomaly in the disordering proc… more
Date: July 10, 1961
Creator: Rauscher, G. P., Jr. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 5 for March 15, 1959 to March 15, 1960

Description: Order-disorder structures of Fe--Al alloys were studied and data on the Muller indices for the diffracting planes of the lattices in the random distribution of FeAl, and Fe/sub 2/Al structures are given. X-ray data for mechanical properties correlation with order-disorder transformation in alloys are tabulated listing the reflecting planes for the various super lattice structures, interplanar spacings, and Bragg angles. Also included are data on x- ray-crystal analyses as function of various he… more
Date: September 11, 1959
Creator: Rauscher, G.; Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Interim Report

Description: An analyers of the basic slip mechanism of several aluminum--iron alloys containing 8 to 16% aluminium indicated a crystallographic typs slip on the {110} planes. The effects of order-disorder heat-treatment variables, scavenging additions, and processing precedures were investigated. Plastic flow and fracture mechanisms in aluminum --iron alloys were investigated as a function of aluminum content. The degree of atomic orderirg in aluminum -iron alloys was studied by means of electrical resisti… more
Date: June 1, 1960
Creator: Rauscher, G.; Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 5

Description: Deformation mechnisms in Fe-Al single crystals were studied. and observations regarding deformation structures are discussed. In surface- preparation studies. a polishing technique was developed which requires only that the chemical bath temperatures be controlled and thnt the bath be agitated. Bath composition is given, and results obtained with Thermenol treated by this technique are included. (J.R.D.)
Date: October 1, 1960
Creator: Rauscher, G. P., Jr.; Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 7 for May 1, 1960 to April 30, 1961

Description: Resistivity specimens of 16-Alfenal and Thermenal were machined from the as-rolled 0.035-in.-thick stock, annealed for varying lengths of time at 650 deg C to obtain the desired microstructures, and prepared to establish a high degree of Fe/sub 3/Al order. Resistivity measurements were made, the results of which are presented graphically. These isothermal resistivity curves were analyzed to establish the effects of heat treatment on the mechanical properties of the various alloys. Initial resul… more
Date: December 1, 1960
Creator: Rauscher, G. P., Jr.; Perkins, F. C. & Nachman, J. F.
Partner: UNT Libraries Government Documents Department
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Automotive storage of hydrogen using modified magnesium hydrides. Final report, March 1976-March 1978

Description: Metal hydrides can store more hydrogen per unit volume than normal high pressure or cryogenic techniques. Little energy is required to store the hydrogen in the hydride, and high stability at room temperature ensures low losses over long storage periods. Safety features of metal hydride storage are favorable. Because of its low weight and high hydrogen storage densities, modified magnesium hydride offers the greatest potential for automotive storage of hydrogen. Experimental and analytical work… more
Date: January 1, 1979
Creator: Rohy, D. A.; Nachman, J. F.; Hammer, A. N. & Duffy, T. E.
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 8, 15 March 1959 to 15 March 1960

Description: Studies are being made on the effects of variation of aluminum content, heat treatment, surface preparation, and other metallurgical factors on the room temperature ductility of Al-- Fe alloys. It is estimated that approximately 65 percent of the proposed research has been completed over the first eight and one-half months of the contract period.
Date: December 8, 1959
Creator: Perkins, Frank C. & Nachman, J. F. (Joseph F.)
Partner: UNT Libraries Government Documents Department
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