Influence of Interfacial Bonding between Metal Droplets on Tensile Properties of 7075 Aluminum Billets by Additive Manufacturing Technique

被引：0

作者：

Hansong Zuo ^{[1
]}

Hejun Li ^{[1
]}

Lehua Qi ^{[2
]}

Songyi Zhong ^{[2
]}

机构：

[1] State Key Laboratory of Solidification Processing, Northwestern Polytechnical University

[2] School of Mechanical Engineering, Northwestern Polytechnical University

来源：

Journal of Materials Science & Technology | 2016年 / 32卷 / 05期

基金：

国家教育部博士点专项基金资助; 中国国家自然科学基金;

关键词：

Aluminum alloys; Mechanical properties; Fracture behavior; Interfacial bonding; Additive manufacturing;

D O I：

暂无

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

7075 aluminum billets were fabricated by micro droplet deposition manufacturing technique,and the influence of interfacial bonding between metal droplets on the tensile properties was studied.Three sets of samples were manufactured under different temperature conditions,and their mechanical properties were compared.The results show that the temperature of the metal droplets and substrate signi?cantly affect the tensile strength of the sample.Moreover,with proper temperature setting,the 7075 aluminum billets manufactured by micro metal droplet deposition could achieve very good mechanical properties with a tensile strength of 373 MPa and an elongation of 9.95%,which are very similar to those of an extruded sample.Moreover,a metallurgical bonding diagram based on numerical calculations of interfacial temperature was established to predict the interfacial bonding state.In addition,the fracture morphologies of these specimens were observed.It is indicated that there was a signi?cant transformation of failure mechanism with the improvement of metallurgical bonding,which agreed well with the numerical results.

引用

页码：485 / 488

页数：4

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