Evaluation of hydrogen-induced cracking in high-strength steel welded joints by acoustic emission technique

被引：23
作者：
Shiraiwa, Takayuki [1 ]
Kawate, Miki [1 ]
Briffod, Fabien [1 ]
Kasuya, Tadashi [1 ]
Enoki, Manabu [1 ]
机构：
[1] Univ Tokyo, Dept Mat Engn, Sch Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
来源：
MATERIALS & DESIGN | 2020年 / 190卷 / 190期
关键词：
Hydrogen embrittlement; high-strength steels; Welded joints; Acoustic emission; Finite element analysis; GENERAL MATHEMATICAL-DESCRIPTION; CRITICAL STRESS INTENSITY; X70 PIPELINE STEEL; HEAT-AFFECTED ZONE; ASSISTED CRACKING; COLD CRACKING; THERMAL-DESORPTION; FRACTURE-BEHAVIOR; DELAYED FRACTURE; FATIGUE LIFE;
D O I：
10.1016/j.matdes.2020.108573
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hydrogen-induced cracking behavior in high-strength steel mainly composed of martensite was analyzed by acoustic emission (AE) technique and finite element method (FEM) in slow strain-rate tensile (SSRT) tests and welding tests. The crack initiation was detected by the AE signals, and the time evolution of stress concentration and hydrogen diffusion were calculated by FEM. The effect of hardness and plastic strain on the hydrogen diffusion coefficient was explicitly introduced into the governing equation in FEM. The criterion and indicator parameter for the crack initiation were derived as a function of maximum principal stress and locally accumulated hydrogen concentration. The results showed that the cracking criterion derived by AE and FEM is useful for predicting the cold cracking behavior and determining the critical preheat temperature to prevent hydrogen-induced cracking. (C) 2020 The Authors. Published by Elsevier Ltd.
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页数：17
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