Critical grain size to limit the hydrogen-induced ductility drop in a metastable austenitic steel

被引：51

作者：

Macadre, Arnaud ^{[1
]}

Nakada, Nobuo ^{[2
]}

Tsuchiyama, Toshihiro ^{[1
,3
]}

Takaki, Setsuo ^{[1
,3
]}

机构：

[1] Kyushu Univ, Int Inst Carbon Neutral Energy Res, Fukuoka 812, Japan

[2] Tokyo Inst Technol, Tokyo, Japan

[3] Kyushu Univ, Fukuoka 812, Japan

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 33期

关键词：

Austenite; Grain size; Hydrogen embrittlement; Ultra-fine grains; STAINLESS-STEELS; EMBRITTLEMENT; BEHAVIOR; TENSILE; PLASTICITY; REFINEMENT;

D O I：

10.1016/j.ijhydene.2015.06.111

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The metastable austenitic stainless steel is Fe-16Cr-10Ni, of which the grain size can be controlled between 1 and 21 mu m. Hydrogen precharging causes a critical drop in ductility during tensile tests for the largest grain size (21 mu m). In order to understand how efficient grain refinement is against hydrogen-induced ductility reduction, by varying the heat treatment conditions, it was possible to manufacture six different grain sizes and pinpoint the grain size at which the drop of ductility is critical. This change in ductility was associated with a transition from fully ductile fracture surface to a fracture surface composed of dimples, quasi-cleavages and intergranular fracture. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：10697 / 10703

页数：7

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