Temperature-dependent characteristics of DH36 steel fatigue crack propagation

被引：15
作者：
Zhao, Weidong [1 ]
Feng, Guoqing [1 ]
Ren, Huilong [1 ]
Leira, Bernt Johan [2 ]
Zhang, Ming [1 ]
机构：
[1] Harbin Engn Univ, Dept Shipbldg Engn, Harbin 150001, Heilongjiang, Peoples R China
[2] Norwegian Univ Sci & Technol, Dept Marine Technol, N-7491 Trondheim, Norway
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2020年 / 43卷 / 03期
基金：
中国国家自然科学基金;
关键词：
DH36; steel; failure mode; fatigue crack propagation; FDBT; low temperatures; BRIDGE STEEL; GROWTH; BEHAVIOR; FRACTURE; WELDS;
D O I：
10.1111/ffe.13177
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
DH36 steel is a widely used material in marine engineering. The fatigue crack propagation rates of DH36 steel at low temperatures have a crucial influence on the fatigue strength of structures operating in polar environments. The objective of this paper is to investigate the fatigue crack propagation behaviour of DH36 steel at low temperatures (-60 degrees C to 20 degrees C) by carrying out tensile tests and fatigue crack propagation tests of DH36 steel, in order to obtain the fatigue crack propagation behaviour of DH36 steel. The influence of the elastic modulus on the crack length measured by the compliance method is considered. On the basis of the Paris law, the crack propagation rate at different temperatures is investigated. The results and the observed failure modes indicated that fatigue ductile-to-brittle transition (FDBT) occurred as the temperature was lowered.
引用
收藏
页码：617 / 627
页数：11
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