The role of hydrogen in hydrogen embrittlement fracture of lath martensitic steel

被引：324

作者：

Nagao, Akihide ^{[1
,2
]}

Smith, Cynthia D. ^{[3
]}

Dadfarnia, Mohsen ^{[1
,4
]}

Sofronis, Petros ^{[1
,4
]}

Robertson, Ian M. ^{[3
,4
]}

机构：

[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[2] JFE Steel Corp, Steel Prod Res Dept, Steel Res Lab, Kawasaki Ku, Kawasaki, Kanagawa 2100855, Japan

[3] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[4] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka 8190395, Japan

来源：

ACTA MATERIALIA | 2012年 / 60卷 / 13-14期

基金：

美国国家科学基金会;

关键词：

Martensite; Hydrogen embrittlement; Intergranular and quasi-cleavage fractures; Scanning electron microscopy; Transmission electron microscopy; ASSISTED CRACKING; QUASI-CLEAVAGE; TRANSFORMATION; TEMPERATURE; IRON;

D O I：

10.1016/j.actamat.2012.06.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure associated with the hydrogen-induced features "flat" and "quasi-cleavage" on the fracture surface of a lath martensitic steel has been visualized in a transmission electron microscope by using focused-ion beam machining to extract samples perpendicular to the fracture surface. Beneath both hydrogen-induced fracture surfaces there is direct evidence, in the form of intense slip bands and destruction of lath boundaries, for significant plasticity. These observations are considered in terms of the fundamental hydrogen embrittlement mechanisms, and the conclusion is reached that the failure is driven by a hydrogen-enhanced and plasticity-mediated decohesion mechanism. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：5182 / 5189

页数：8

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