High cycle fatigue behavior of V-microalloyed medium carbon steels: A comparison between bainitic and ferritic-pearlitic microstructures

被引：33

作者：

Hui, Weijun ^{[1
]}

Zhang, Yongjian ^{[1
]}

Zhao, Xiaoli ^{[1
]}

Xiao, Na ^{[1
]}

Hu, Fangzhong ^{[2
]}

机构：

[1] Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China

[2] Maanshan Iron & Steel Co Ltd, Ctr Tech, Maanshan 243002, Anhui, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 91卷

基金：

中国国家自然科学基金;

关键词：

High cycle fatigue; Microalloyed steel; Stress concentration; Microstructure; Fatigue crack growth rate; FORGING CONDITIONS; HIGH-STRENGTH;

D O I：

10.1016/j.ijfatigue.2016.06.013

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

High cycle fatigue behavior of two V-microalloyed medium carbon steels with ferritic-pearlitic and bainitic microstructures were studied by using rotating bending fatigue and fatigue crack growth (FCG) testing. The results show that fatigue strength sigma(w) is a power function of K-t with its coefficient equals to smooth fatigue strength. This function provides a simple method for predicting notch fatigue strength of components. Bainitic steel shows higher sigma(w), lower fatigue notch sensitivity and FCG rate than those of ferritic-pearlitic steel. It is concluded that bainitic steel is. a promising candidate to manufacture automobile security components in terms of fatigue properties. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：232 / 241

页数：10

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