First-principles and experimental investigations on ductility/brittleness of intermetallic compounds and joint properties in steel/aluminum laser welding

作     者：Tian LI Dian-wu ZHOU You-rui-ling YAN Ping PENG Jin-shui LIU 李田;周惦武;严佑锐凌;彭平;刘金水

作者机构：State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China School of Materials Science and EngineeringHunan UniversityChangsha 410082China 

基　　金：the National Natural Science Foundation of China(Nos.51674112 51774125) 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2021年第31卷第10期

页      码：2962-2977页

摘      要：Morphology,distribution,composition,forming ability,structural stability and intrinsic mechanical properties of the intermetallic compounds(IMCs)formed in steel/aluminum laser welding were determined through scanning electron microscope,energy dispersive spectrometer,X-ray diffractometer and first-principles *** was found that the mechanical properties of the joint are limited by the Fe−Al IMCs,whose brittleness is attributed to the orbital hybridization between Al(s),Al(p)and Fe(d).However,the joint properties are improved by adding interlayer,which is ascribed to some changes of electronic structure of the generated *** transition mechanism of IMCs changing from brittle to ductile is mainly due to the weak ability of interlayer elements to attract *** mechanical properties of the joint are closely related to the ductility or brittleness of the ***,the addition of Ti foil interlayer effectively improves the mechanical properties of the joints,which means that the experimental verification is in good agreement with the theoretical calculation predictions.

主 题 词：first-principles calculation elastic constant ductility brittleness laser welding mechanical properties 

学科分类：080503[080503] 0806[工学-电气类] 08[工学] 0805[工学-能源动力学] 0802[工学-机械学] 080201[080201] 

核心收录：

D　O　I：10.1016/S1003-6326(21)65706-0

馆 藏 号：203105936...