Delayed hydride cracking in Zr-2.5Nb pressure tube material: influence of fabrication routes

被引：30
|
作者：
Singh, RN [1 ]
Roychowdhury, S [1 ]
Sinha, VP [1 ]
Sinha, TK [1 ]
De, PK [1 ]
Banerjee, S [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Mat Sci, Bombay 400085, Maharashtra, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 374卷 / 1-2期
关键词：
mechanical properties; diffusion; hydrogen embrittlement; hydrides; zirconium;
D O I：
10.1016/j.msea.2004.03.008
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The delayed hydride cracking (DHC) velocity was measured for Zr-2.5Nb alloy pressure tubes manufactured from cold-worked and stress-relieved (CWSR) route and quenched and aged (Q&A) route at 162, 203, and 250degreesC. It was observed that the DHC velocity in the pressure tubes produced from Q&A route is about half to one-third of that observed in the tubes produced from CWSR route. The lower DHC velocity in Q&A tubes compared to that in the CWSR tubes have been rationalized in terms of the difference in strength and effective hydrogen diffusivity compared to the tubes manufactured from CWSR route. A modification to Dutton-Puls model of DHC is suggested by proposing alternate expression for the elastic stress-field ahead of a sharp crack for an elasto-plastic material. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：342 / 350
页数：9
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