Age hardening in beryllium-aluminum-silver alloys

被引:21
作者
Carter, DH
McGeorge, AC
Jacobson, LA
Stanek, PW
机构
关键词
D O I
10.1016/1359-6454(96)00113-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Three different alloys of beryllium-aluminum-silver were processed to powder by centrifugal atomization in a helium atmosphere. Alloy compositions were, by weight percent, Be-47.5Al-2.5Ag, Be-47Al-3Ag, and Be46Al-4Ag. Due to the low solubility of both aluminum and silver in beryllium, the silver was concentrated in the aluminum phase, which separates from the beryllium in the liquid phase. A fine, continuous composite beryllium-aluminum microstructure was formed, which did not significantly change after hot isostatic pressing. Samples of hot isostatically pressed material were solution treated at 550 degrees C for 1 h, followed by a water quench. Aging temperatures were 150, 175, 200, and 225 degrees C for times ranging from half an hour to 65 h. Results indicate that peak hardness was reached in 36-40 h at 175 degrees C and 12-16 h at 200 degrees C aging temperature. relatively independent of alloy composition. Copyright (C) 1996 Acta Metallurgica Inc.
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页码:4311 / 4315
页数:5
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