Stress-dependent hardening-to-softening transition of hydrogen effects in nanoindentation of a linepipe steel

被引：42

作者：

Lee, Dong-Hyun ^{[1
]}

Lee, Jung-A ^{[1
]}

Seok, Moo-Young ^{[1
]}

Baek, Un Bong ^{[2
]}

Nahm, Seung Hoon ^{[2
]}

Jang, Jae-il ^{[1
]}

机构：

[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[2] Korea Res Inst Stand & Sci, Div Ind Metrol, Taejon 305340, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 04期

关键词：

Hydrogen; Nanoindentation; Hardness; Linepipe steel; AUSTENITIC STAINLESS-STEEL; MECHANICAL-PROPERTIES; INDENTER ANGLE; TITANIUM-ALLOY; DEFORMATION; EMBRITTLEMENT; LOAD; IRON; PLASTICITY; FRACTURE;

D O I：

10.1016/j.ijhydene.2013.11.060

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：

We explored the influences of hydrogen on small-scale strength of a linepipe steel through nanoindentation experiments with four pyramidal indenters. Interestingly, a transition from hydrogen-induced hardening to softening was observed as indenter sharpness increases. The transition was analyzed based on the enhancement in hydrogen's elastic shielding effects for a sharper indenter, which could be indirectly evidenced by the stress effects on indentation pile-up, dislocation density, and rate dependency of hardness. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：1897 / 1902

页数：6

共 45 条

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