Deformation Characteristics and Mechanical Properties of Ti/Al Bimetallic Composite Materials Fabricated by Wire Plus Arc Additive Manufacturing  

作　　者：夏玉峰 ZHANG Xue CHEN Lei JIANG Xianhong LIAO Hailong XIA Yufeng;ZHANG Xue;CHEN Lei;JIANG Xianhong;LIAO Hailong(College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China)

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第4期885-892,共8页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51775068)。

摘　　要：We focused on Ti/Al composite materials fabricated by wire and arc addictive manufacturing,and the microstructure and interface characteristics of them before and after hot compression deformation were compared.After compression deformation,allαstructures of titanium were compacted with the emergence of Widmanstatten structures.Coarsened coloniesαof titanium were elongated and waved along the original growth direction,resulting in anisotropy of grains.Pores and Ti/Al intermetallic compounds of aluminum are significantly decreased after hot compression.Meanwhile,a good bonding interface between titanium and aluminum is obtained after hot compression,and the element diffusion is more intense.In addition,the mechanical properties and fracture behaviors of Ti/Al composite material with different clad ratio that is defined as the ratio of the thickness of titanium to that of the Ti/Al composite material are investigated by uniaxial tensile test.The experimental results show that the ultimate tensile strength of Ti/Al composite material is between that of single deposited titanium and aluminum,while the elongation of Ti/Al composite material with low clad ratio is lower than that of single aluminum due to the metallurgical reaction.As the clad ratio increases,the two component layers are harder to separate during deformation,which is resulted from the decrease of the inward contraction stress of three-dimensional stress caused by necking of aluminum.This work may promote the engineering application of Ti/Al bimetallic structures.

关 键 词：wire plus arc additive manufacturing aluminium alloy titanium alloy bimetallic composite materials deformation mechanical properties 

分 类 号：TB331[一般工业技术—材料科学与工程]