Effect of hydrogen on martensite formation in austenitic stainless steels in high-pressure torsion

被引：131

作者：

Mine, Yoji ^{[1
,2
]}

Horita, Zenji ^{[3
]}

Murakami, Yukitaka ^{[1
,2
]}

机构：

[1] Kyushu Univ, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Ctr Hydrogen Ind Use & Storage, HYDROGENIUS, Nishi Ku, Fukuoka 8190395, Japan

[3] Kyushu Univ, Dept Mat Sci & Ceram, Nishi Ku, Fukuoka 8190395, Japan

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 10期

关键词：

Severe plastic deformation; Strain-induced martensitic transformation; Hydrogen; Diffusion; Austenitic steel; FATIGUE-CRACK GROWTH; PLASTIC-DEFORMATION; EMBRITTLEMENT; PERMEATION; DIFFUSION; MECHANISM; BEHAVIOR; STRESS;

D O I：

10.1016/j.actamat.2009.03.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The martensitic transformation induced by high-pressure torsion (HPT) and hydrogen desorption in Type 304 and 316L austenitic stainless steels is reported in this paper. When Type 304 with only 2.2 mass ppm hydrogen was subjected to HPT, LIP to 95% of the austenite transformed to martensite. For Type 316L with 1.5 ppm hydrogen content, martensitic transformation during HPT was up to 50%. Martensitic transformation during HPT was suppressed by hydrogen pre-charging to <80% for Type 304 with 24.2 ppm hydrogen and <10% for Type 316L with 22.3 ppm hydrogen. This is presumed to be due to slip localization by hydrogen-enhanced slip planarity. Because of the significantly greater hydrogen solubility and lower diffusivity in austenite as compared to martensite, it is hypothesized that when hydrogen-containing austenite is transformed to martensite, excess hydrogen is released and then diffuses primarily through martensite. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2993 / 3002

页数：10

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