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

页数：4

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