Study on the high cycle fatigue behavior of titanium microalloyed high strength beam steel by magnesium treatment

被引：1
|
作者：
Gao, Zhijun [1 ,2 ,4 ]
Pan, Guangfei [2 ]
Song, Yu [3 ]
Wang, Shuize [2 ]
Ye, Xiaoyu [3 ]
Mao, Xinping [2 ]
机构：
[1] Cent Iron & Steel Res Inst Co Ltd, Beijing 100081, Peoples R China
[2] Univ Sci & Technol Beijing, Res Inst Carbon Neutral, Beijing 100083, Peoples R China
[3] Pangang Grp Res Inst Co Ltd, State Key Lab Vanadium Titanium Resources Compreh, Panzhihua 617000, Peoples R China
[4] Cent Iron & Steel Res Inst CISRI, Special Steel Dept, Beijing 100081, Peoples R China
来源：
VACUUM | 2023年 / 216卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Titanium microalloyed steel; High cycle fatigue; Fatigue crack growth rate; Magnesium treatment; CRACK GROWTH; MG; INCLUSIONS; NUCLEATION; EVOLUTION;
D O I：
10.1016/j.vacuum.2023.112389
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Non-metallic inclusions, which was mainly modified by magnesium treatment process in this work, played a decisive role in controlling the high cycle fatigue behavior of titanium microalloyed high strength beam steel. Magnesium treatment process profoundly reduces the large-sized inclusions in experimental steels, leading to a high fatigue strength and crack growth resistance simultaneously. The magnesium treatment process improved fatigue strength by 5.1% despite a 7.3% decrease in tensile strength of 6-Mg steel. In addition, Generalized Pareto Distribution (GPD) statistical method is used to evaluate the maximum inclusion size, which decreases by 25.3% through magnesium treatment process. These findings provide a new strategy to develop a titanium microalloyed beam steel with outstanding fatigue resistance.
引用
收藏
页数：4
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