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
收藏
页码：232 / 241
页数：10
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