Residual mechanical properties of corroded ultra-high-strength steels and weld metals

被引：17

作者：

Chen, Man-Tai ^{[1
,2
]}

Gong, Zhichao ^{[1
,2
]}

Cao, Huan ^{[1
,2
]}

Zhang, Jingjing ^{[3
]}

Ren, Fengming ^{[4
]}

Ho, Johnny Ching Ming ^{[5
]}

Lai, Mianheng ^{[4
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Civil Engn, Shanghai Key Lab Digital Maintenance Bldg & Infras, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Engn Mech Expt Ctr, Shanghai 200240, Peoples R China

[4] Guangzhou Univ, Sch Civil Engn & Transportat, Guangzhou 510006, Peoples R China

[5] Univ Queensland, Sch Civil Engn, Brisbane, Qld 4072, Australia

来源：

THIN-WALLED STRUCTURES | 2024年 / 205卷

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

Corrosion; High-strength steel; Residual mechanical properties; Tensile coupon tests; Weld metal; CORROSION BEHAVIOR;

D O I：

10.1016/j.tws.2024.112397

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents an in-depth investigation into the residual mechanical properties of ultra-high-strength steels and weld metals after exposure to corrosive environment. The tensile specimens of weld metals were fabricated using ER100S-G, ER110S-G, ER120S-G feedstock wires by robotic gas metal arc welding, whilst ultra-high-strength steel tensile coupon specimens were machined from the Q890 and Q960 steel plates. The high-strength steel and weld metal tensile specimens were exposed to neutral salt spray accelerated corrosion conditions. Six exposure durations were designed to achieve different corrosion degrees of specimens. A total of 23 corroded ultra-high-strength steel tensile coupon specimens and 19 corroded high-strength weld metal specimens were included. The geometric profiles of corroded steel specimens were determined via non-contact 3D laser scanning. Monotonic tensile tests were conducted to determine the stress-strain responses and key mechanical properties of corroded steel and weld specimens. Mechanical properties deterioration of corroded ultra-high-strength steels and weld metals are reported and discussed. Prediction equations on the residual mechanical properties regarding the tensile loading capacity, yield stress and ultimate tensile stress of ultra-high-strength steels and weld metals after exposure to corrosive environment were established.

引用

页数：11