Fatigue properties of ultra-fine grained dual phase ferrite/martensite low carbon steel

被引：64

作者：

Okayasu, A. ^{[1
]}

Sato, K. ^{[1
]}

Mizuno, M. ^{[1
]}

Hwang, D. Y. ^{[2
]}

Shin, D. H. ^{[2
]}

机构：

[1] Akita Prefectural Univ, Dept Machine Intelligence & Syst Engn, Tuchiya Aza, Yurihonjo 0150055, Japan

[2] Hanyang Univ, Dept Mat Sci & Engn, Ansan 425791, Kyunggi Do, South Korea

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2008年 / 30卷 / 08期

关键词：

equal channel angular pressing; dual phase steel; ultra-fine grain; fatigue properties; fracture mechanism;

D O I：

10.1016/j.ijfatigue.2007.10.011

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An examination has been made of the fatigue properties of ultra-fine grained two phase ferrite/martensite low carbon steel, produced by equal channel angular pressing (ECAP). The fatigue strength and fracture mechanism of the ECAP steel were compared with those of the as-received sample. The fatigue strength of the ECAP steel was twice as high as that of the as-received steel. The fatigue strength was linearly related to the tensile strength for both the ECAP and as-received steels although their slopes were different; the slope for the ECAP steel was greater. In addition, different fracture characteristics were observed; intergranular fractures were dominant in the ECAP steel whereas transgranular fractures occurred in the as-received steel. Such differences in fatigue strength and fracture characteristic are attributed to their material properties. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1358 / 1365

页数：8

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