Age hardening in rapidly solidified and hot isostatically pressed beryllium-aluminum-silver alloys

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Three different alloys of beryllium, aluminum and silver were processed to powder by centrifugal atomization in a helium atmosphere. Alloy compositions were, by weight, 50% Be, 47.5% Al, 2.5% Ag, 50% Be, 47% Al, 3% Ag, and 50% Be, 46% Al, 4% Ag. Due to the low solubility of both aluminum and silver in beryllium, the silver was concentrated in the aluminum phase, which appeared to separate from the beryllium in the liquid phase. A fine, continuous composite beryllium-aluminum microstructure was formed, which did not significantly change after hot isostatically pressing at 550 C for one hour at 30,000 psi ... continued below

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8 p.

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Carter, D.H.; McGeorge, A.C.; Jacobson, L.A. & Stanek, P.W. July 1, 1995.

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Three different alloys of beryllium, aluminum and silver were processed to powder by centrifugal atomization in a helium atmosphere. Alloy compositions were, by weight, 50% Be, 47.5% Al, 2.5% Ag, 50% Be, 47% Al, 3% Ag, and 50% Be, 46% Al, 4% Ag. Due to the low solubility of both aluminum and silver in beryllium, the silver was concentrated in the aluminum phase, which appeared to separate from the beryllium in the liquid phase. A fine, continuous composite beryllium-aluminum microstructure was formed, which did not significantly change after hot isostatically pressing at 550 C for one hour at 30,000 psi argon pressure. Samples of HIP material were solution treated at 550 C for one hour, followed by a water quench. Aging temperatures were 150, 175, 200 and 225 C for times ranging from one half hour to 65 hours. Hardness measurements were made using a diamond pyramid indenter with a load of 1 kg. Results indicate that peak hardness was reached in 36--40 hours at 175 C and 12--16 hours at 200 C aging temperature, relatively independent of alloy composition.

Physical Description

8 p.

Notes

INIS; OSTI as DE95015328

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  • Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995

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  • Other: DE95015328
  • Report No.: LA-UR--95-1666
  • Report No.: CONF-950201--20
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/102191 | External Link
  • Office of Scientific & Technical Information Report Number: 102191
  • Archival Resource Key: ark:/67531/metadc625750

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 29, 2016, 1:02 p.m.

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Carter, D.H.; McGeorge, A.C.; Jacobson, L.A. & Stanek, P.W. Age hardening in rapidly solidified and hot isostatically pressed beryllium-aluminum-silver alloys, report, July 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc625750/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.