Effect of hydrogen on dynamic precipitation of carbide in type 304 stainless steel during creep process

被引：12

作者：

He, J ^{[1
]}

Han, G ^{[1
]}

Fukuyama, S ^{[1
]}

Yokogawa, K ^{[1
]}

Kimura, A ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,AOBA KU,SENDAI,MIYAGI 98077,JAPAN

来源：

ACTA MATERIALIA | 1997年 / 45卷 / 08期

关键词：

D O I：

10.1016/S1359-6454(96)00400-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of hydrogen on the creep behavior of type 304L, the solution-treated and sensitized type 304 stainless steels was investigated in 9.9 MPa argon and hydrogen at 823 K. Hydrogen did not affect the creep properties of 304L stainless steel and slightly affected those of the sensitized 304 stainless steel, however, hydrogen decreased the creep strength and increased the creep ductility of the solution-treated 304 stainless steel above the rupture time of 153 h when carbides were precipitated on the grain boundaries. Hydrogen affected the dynamic precipitation of carbide. especially the morphology of the carbide on the grain boundary in the solution-treated 304 stainless steel. The shape of the carbides was changed from granular carbides in argon to plate-shaped carbides in hydrogen. It is suggested that hydrogen decreased ;he interfacial energy of the carbide. The influence of hydrogen on creep properties of the solution-treated 304 stainless steel was mainly due to a change in the shape of the carbide on the grain boundary caused by the hydrogen. The plate-shaped carbide covered a wider area of the grain boundary than granular carbide at the same volume, so grain boundary sliding was more effectively blocked by the carbide in hydrogen. (C) 1997 Acta Metallurgica Inc.

引用

页码：3377 / 3388

页数：12

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