Effects of hydrogen on fatigue behavior of near-alpha titanium alloys

被引：17

作者：

Sinha, V. ^{[1
]}

Schwarz, R. B. ^{[2
]}

Mills, M. J. ^{[1
]}

Williams, J. C. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

[2] Los Alamos Natl Lab, Struct Properties Relat Grp, Mail Stop G755, Los Alamos, NM 87545 USA

来源：

SCRIPTA MATERIALIA | 2018年 / 153卷

关键词：

Titanium alloys; Hydrogen; Fatigue; Scanning electron microscopy; Fractography; DWELL-SENSITIVE FATIGUE; EMBRITTLEMENT; LIFE;

D O I：

10.1016/j.scriptamat.2018.03.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of hydrogen content on fatigue response was examined for a near-a titanium alloy, Ti-6Al-2Sn-4Zr-2Mo-0.1Si, in bimodal microstructural condition with similar to 70 vol% primary a. The hydrogen content was varied in the range 7-127 ppm (by weight). The fracture mechanism at crack-initiation sites changed from ductile tearing with localized plasticity in low (<50 ppm) hydrogen alloys to a more brittle fracture with facets in high (>= 100 ppm) hydrogen alloys. The variation in fatigue life (by a factor of <= 1.8) was partially associated with the differences in hydrogen level and partially with the statistical scatter in life. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：81 / 85

页数：5

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