Transition of creep mechanism by solute hydrogen in Zircaloy-4

被引：4

作者：

Matsunaga, Tetsuya ^{[1
,2
]}

Hongo, Hiromichi ^{[1
]}

Tabuchi, Masaaki ^{[1
]}

Satoh, Yuhki ^{[2
]}

Abe, Hiroaki ^{[2
]}

机构：

[1] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[2] Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 684卷

关键词：

Zircaloy-4; Creep; Solute hydrogen; Straight dislocation; Dislocation network; Cross-slip; JOGGED-SCREW MODEL; ZIRCONIUM ALLOYS; BEHAVIOR; DEFORMATION; EVOLUTION;

D O I：

10.1016/j.msea.2016.12.057

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of solute hydrogen up to 200 ppm on the creep mechanism of Zircaloy-4 was discussed to ascertain the safety of nuclear power plants. Creep tests performed at 673 K and revealed that the addition of solute hydrogen decreased the creep rate in intermediate stress regions. According to the followed transmission electron microscopy, the phenomenon reflected the change of rate-controlling mechanisms without or with solute hydrogen: cross-slip in a non-hydrogenated sample with H=10 ppm; solute-atmosphere dragging process in hydrogenated samples with H=100 and 200 ppm. Because cross-slip works as the annihilation process for the glide dislocations in Zircaloy-4, it is considered that the suppression of cross-slip by solute hydrogen leads to a decrease in the creep rate.

引用

页码：191 / 195

页数：5

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