Study on plasma wire and arc additive manufacturing process of titanium alloys with twin-wire feeding

被引：0
|
作者：
Xu J. [1 ]
Peng Y. [1 ]
Zhou Q. [1 ]
Wang K. [1 ]
Zhu J. [2 ]
机构：
[1] Nanjing University of Science and Technology, Nanjing
[2] Nanjing Institute of Technology, Nanjing
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 09期
关键词：
Additive manufacturing; Microstructures; Tensile strength; Titanium alloy; Twin-wire feeding;
D O I：
10.12073/j.hjxb.2019400236
中图分类号：
学科分类号：
摘要：
TC4-TA2 titanium alloy component was deposited by plasma wire arc additive manufacturing with twin-wire feeding and its good depositional morphology and excellent mechanical properties were expected. OM, SEM, EDS, XRD, tensile and hardness test were carried out to study the macro and microstructure of the component, as well as mechanical properties. The results showed that there were two kinds of microstructures in the component. They were the colonies of α phase which was distribute in the junction of the deposited layer and the lamellar of α + β phase which was distribute in the center of the deposited layer. The tensile strength of specimens in the vertical and horizontal directions were 998 MPa and 1 037 MPa, respectively. Meanwhile, their elongation at break were 9.2% and 5.7% and the fracture appeared as brittle cleavage fracture. The experimental results showed that the plasma arc additive manufacturing with twin-wire feeding can realize the preparation of dissimilar titanium alloy components. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
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页码：59 / 64
页数：5
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