Fatigue Crack Propagation Rate of High Strength Steel's Welded Joints

被引：0

作者：

Li, Hong-Tao ^{[1
,2
]}

Song, Xu-Ding ^{[1
]}

机构：

[1] Changan Univ, Key Lab Technol & Equipment Highway Construct, Minist Educ, Xian 710064, Peoples R China

[2] Luoyang Inst Sci & Technol, Dept Mech Engn, Luoyang 471023, Peoples R China

来源：

PROCEEDINGS OF THE 2ND ANNUAL INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL ENGINEERING (AME 2016) | 2016年 / 85卷

关键词：

High Strength Low Alloy Steel; Fatigue Crack; Da/dN-Delta K Curve; Fatigue fracture; Microstructure; LOW-ALLOY STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high strength low alloy steel's (HG785D) welded joint was formed by strength match under MAG (80% Ar + 20% CO2). The microstructure, micro-hardness and fatigue crack growth rate of the parent metal, weld and heat affected zone were tested and analyzed. The results show that the heat affected zone's hardness is highest and the parent metal's hardness is lowest; Different part of the butt joint's fatigue crack propagation rate is different at the same stress ratio, the heat affected zone's fatigue crack propagation rate is the fastest while the weld joint is the lowest. And through the analysis of fatigue fracture and the weld microstructure from the parent metal to the weld joint, the reason why different part's fatigue crack growth rate is different is that their metallographic microstructure is different. Chinese library classification: TG407.

引用

页码：450 / 456

页数：7

共 7 条

[1]

[Anonymous], 1991, GBT43421991

[2]

[Anonymous], 2000, GB63982000

[3] Effects of alloying elements on the microstructure and inclusion formation in HSLA multipass welds [J].