The effect of aging on hydrogen trapping in precipitation-hardened alloys

被引：27
作者：
Pound, BG [1 ]
机构：
[1] SRI Int, Menlo Park, CA 94025 USA
来源：
CORROSION SCIENCE | 2000年 / 42卷 / 11期
关键词：
alloy; steel; potentiostatic; hydrogen absorption;
D O I：
10.1016/S0010-938X(00)00036-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hydrogen trapping in two precipitation-hardened alloys - 18Ni (250) maraging steel and alloy X-750 - was studied using a potentiostatic pulse technique. Irreversible trapping constants (k) and hydrogen entry fluxes were determined for these alloys in 1 mol 1(-1) acetic acid/1 mol 1(-1) sodium acetate. The values of k for stress-equalized and stress-equalized/ aged alloy X-750 were higher than those for three other hardened Ni-base alloys (625, 718, and 925) hut were considerably lower than the value for the aged 18Ni steel. A correlation was found between k and the observed resistance to hydrogen embrittlement for three groups of aged alloys: X-750 and 718; 18Ni (250) and 718; and 18Ni (250), 18Ni (300), and 4340 steels. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1941 / 1956
页数：16
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