Characterization and Evaluation of Fatigue Fracture of Welded Joints of ASTM A572 Gr65 Steel

YANG Zeyuan; YAN Zhifeng; WANG Shubang; HAN Mingzhu; ZHANG Hongxia

doi:10.7512/j.issn.1001-2303.2022.12.04

Important Issuse | Views : 0 下载量: 72 CSCD: 0

PDF
Export
Share
Collection
Album

Characterization and Evaluation of Fatigue Fracture of Welded Joints of ASTM A572 Gr65 Steel
Vol. 52, Issue 12, Pages: 36-42(2022)
Received：12 February 2022，

Published：20 December 2022
DOI： 10.7512/j.issn.1001-2303.2022.12.04
稿件说明：

移动端阅览

杨泽源，闫志峰，王树邦，等.ASTM A572 Gr65钢焊接接头疲劳断裂表征与评定［J］.电焊机，2022，52（12）：36-42. DOI： 10.7512/j.issn.1001-2303.2022.12.04.

YANG Zeyuan, YAN Zhifeng, WANG Shubang, et al.Characterization and Evaluation of Fatigue Fracture of Welded Joints of ASTM A572 Gr65 Steel[J].Electric Welding Machine, 2022, 52(12): 36-42. DOI： 10.7512/j.issn.1001-2303.2022.12.04.

摘要

ASTM A572 Gr65钢焊接结构件经常要承受动态载荷的作用，接头部位容易发生疲劳失效。在分析ASTM A572 Gr65钢MAG焊接接头力学性能的基础上，结合红外热像法评定了其焊接接头的疲劳性能。结果表明，焊缝区金相组织主要为针状铁素体，其硬度为197~203 HV0.5；焊接接头的屈服强度为350 MPa；在静态载荷和循环载荷下，ASTM A572 Gr65钢焊接接头的表面温度均呈规律性变化，循环载荷下的变形规律与疲劳过程中的温度演化相对应。利用疲劳过程中试件表面的红外温度信息进行评定，疲劳极限为234.18 MPa，与疲劳试验

S-N

曲线得到的结果（246.60 MPa）相比误差为5.04%；疲劳断裂发生于焊缝区，疲劳裂纹源位于试样内部，呈“鱼眼”状。

Abstract

ASTM A572 Gr65 steel welded structure is often subjected to dynamic loads

and the joints are prone to fatigue failure. Based on the analysis of the mechanical properties of MAG welded joint of ASTM A572 Gr65 steel

the fatigue properties of the welded joint were evaluated by infrared thermography. The results show that the metallographic structure of the weld zone is mainly acicular ferrite

and its hardness is 197~203 HV0.5；the yield strength of welded joints is 350 MPa; the surface temperature of welded joints of ASTM A572 Gr65 steel changes regularly under static load and cyclic load. The deformation law under cyclic load corresponds to the temperature evolution during fatigue. The infrared temperature information on the surface of the specimen during fatigue is evaluated. The fatigue limit is 234.18 MPa

and the error is 5.04% compared with the result of 246.6 MPa obtained from the

S-N

curve of fatigue test; the fatigue fracture occurs in the weld zone

and the fatigue crack source is located in the interior of the sample

in the shape of "fish eye".

关键词

Keywords

references

Song Q Y ， Heidarpour A ， Zhao X L ， et al . Post-earthquake fire behavior of welded steel I-beam to hollow column connections： An experimental investigation ［J］. Thin-Walled Structures ， 2016 （ 1 ）： 143 - 153 .

冯祥利，王磊，刘杨 . Q460钢焊接接头组织及动态断裂行为的研究［J］. 金属学报， 2016 ， 52 （ 7 ）： 787 - 796 .

FENG X L ， WANG L ， LIU Y . Study on Microstructure and Dynamic Fracture Behavior of Q460 Steel Welding Joints ［J］. Acta Metallurgica Sinica ， 2016 ， 52 （ 7 ）： 787 - 796 .

贾朋刚，程广福，高秀玲，等 . B780CF高强钢板焊接接头的疲劳性能分析［J］. 焊接， 2017 （ 10 ）： 33 - 36 .

JIA P G ， CHENG G F ， GAO X L ， et al . Fatigue analysis of B780CF steel welded joint ［J］. Welding & Joining ， 2017 （ 10 ）： 33 - 36 .

邱晨，邢佶慧，张丽，等 . Q460高强钢材及T形对接接头超低周疲劳特性［J］. 振动与冲击， 2021 ， 40 （ 16 ）： 166 - 174 .

QIU C ， XING J H ， ZHANG L ， et al . Ultra-low cycle fatigue properties of Q460 high strength T-shape butt weld joints ［J］. Journal of Vibration and Shock ， 2021 ， 40 （ 16 ）： 166 - 174 .

魏世同，姜海昌，陆善平 . 快捷货车转向架用 Q345E 钢板焊接接头疲劳性能研究［J］. 电焊机， 2020 ， 50 （ 1 ）： 105 - 108 .

WEI S T ， JIANG H C ， LU S P . Research on fatigue property of the welded joints of Q345E steel plate for express freight car bogie ［J］. Electric Welding Machine ， 2020 ， 50 （ 1 ）： 105 - 108 .

Ummenhofer T ， Medgenberg J . On the use of infrared thermography for the analysis of fatigue damage processes in welded joints ［J］. International Journal of Fatigue ， 2009 ， 31 （ 1 ）： 130 - 137 .

Rosa G L ， Risitano A . Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components ［J］. International Journal of Fatigue ， 2000 ， 22 （ 1 ）： 65 - 73 .

Luong M P . Nondestructive evaluation of fatigue limit of metals using infrared thermography ［J］. Mater Research Society ， 1997 ， 503 ： 275 - 288 .

Luong M P . Fatigue limit evaluation of metals using an infrared thermographic technique ［J］. Mater Research Society ， 1998 ， 28 ： 155 - 163 .

Cura F ， Curti G ， Sesana R . A new iteration method for the thermographic determination of fatigue limit in steels ［J］. International Journal of Fatigue ， 2005 ， 27 （ 4 ）： 453 - 459 .

Neto D M ， Simoes V M ， Oliveira M C ， et al . Experimental and numerical analysis of the heat generated by plastic deformation in quasi-static uniaxial tensile tests ［J］. Mechanics of Materials ， 2020 ， 146 ： 103398 .

Fatoba O ， Akid R . Uniaxial cyclic elasto-plastic deformation and fatigue failure of API-5L X65 steel under various loading conditions ［J］. Theoretical and Applied Fracture Mechanics ， 2018 ， 94 ： 147 - 159 .

编辑部网址： http：//www.71dhj.com http://www.71dhj.com