Effects of finish rolling deformation on hydrogen-induced cracking and hydrogen-induced ductility loss of high-vanadium TMCP X80 pipeline steel

被引：16
作者：
Li, Longfei [1 ]
Song, Bo [1 ]
Cui, Xiaokang [1 ]
Liu, Zhen [1 ]
Wang, Lei [1 ]
Cheng, Wensen [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 55期
基金：
中国国家自然科学基金;
关键词：
Finish rolling deformation; Hydrogen-induced ductility loss; X80 pipeline steel; Cracking propagation; Nano-scale precipitates; STRESS-CORROSION CRACKING; CRYSTALLOGRAPHIC TEXTURE; GRAIN-BOUNDARY; EMBRITTLEMENT; STRENGTH; MICROSTRUCTURE; INCLUSIONS; RESISTANCE; DIFFUSION; BEHAVIOR;
D O I：
10.1016/j.ijhydene.2020.08.065
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An optimum finish rolling deformation (FRD) of thermomechanical controlled processing (TMCP) is suggested to improve the hydrogen-induced ductility loss of high-vanadium X80 pipeline steel in this study. The results demonstrate that with increasing FRD the microstructure refines, the grain size of the steel decreases and the recrystallization degree deepens. The increase of FRD leads to the reduction of low angle grain boundaries (LAGBs) and the grains oriented with plane {100} parallel to normal direction ({100}//ND) fibres, which plays a significant role in improving the resistance of crack propagation. Besides, the differences of effective hydrogen diffusion coefficient and diffusible hydrogen concentration are negligible among four experimental steels with various FRD. However, the best hydrogen-induced ductility loss resistance is obtained in the steel with 40% FRD containing the most nano-scale precipitates acting as effective hydrogen traps. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：30828 / 30844
页数：17
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