Microstructure and properties of the interlayer heat-affected zone in X80 pipeline girth welds

作     者：Fang Bai Hongsheng Ding Lige Tong Liqing Pan Fang Bai;Hongsheng Ding;Lige Tong;Liqing Pan

作者机构：School of Mathematics and PhysicsUniversity of Science and Technology Beijing Pipeline Institute China Petroleum Pipeline Engineering Co.Ltd. School of Energy and Environmental EngineeringUniversity of Science and Technology Beijing College of ScienceChina Three Gorges University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2020年第30卷第1期

页      面：110-117页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：Girth weld Interlayer heat-affected zone Thermal simulation Granular bainite Toughness 

摘      要：The heat-affected zone between the layers of a weld metal is a sensitive and important component of girth welds in X80 ***,only a few studies have focused on the interlayer heat-afected zone(IHAZ).In this work,thermal simulation was conducted to investigate the relationship between IHAZ microstructure and *** showed that the toughness of the weld metal improved after a single welding thermal cycle but decreased after double welding thermal cycles,particularly when the weld metal was subjected to unaltered coarse grains of *** relationship between the microstructure and properties of IHAZ was established to present the correlation of toughness with granular bainite content,grain size,and high-angle grain boundary content.