Achieving Ti6Al4V alloys with both high strength and ductility via selective laser melting

被引：84

作者：

Liu, Jiangwei ^{[1
]}

Sun, Qidong ^{[1
]}

Zhou, Chang'an ^{[1
]}

Wang, Xiebin ^{[2
]}

Li, Hu ^{[3
]}

Guo, Kai ^{[1
]}

Sun, Jie ^{[1
]}

机构：

[1] Shandong Univ, Sch Mech Engn, Key Lab High Efficiency & Clean Mech Manufacture, Jinan 250061, Shandong, Peoples R China

[2] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China

[3] Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 766卷

基金：

国家重点研发计划;

关键词：

Selective laser melting; Ti6Al4V alloy; Ductility; Tensile strength; Microstructural control; MECHANICAL-PROPERTIES; HEAT-TREATMENT; TENSILE PROPERTIES; MICROSTRUCTURE; TI-6AL-4V; TEMPERATURE; BEHAVIOR; TRANSFORMATION; COMPONENTS; DEFECTS;

D O I：

10.1016/j.msea.2019.138319

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Improving the ductility of manufactured Ti-based alloys by selective laser melting (SLM) while still maintaining the high mechanical strength is one of the major challenges in additive manufacturing. In this work, a systematic investigation on the process parameters for achieving such a material is performed. By employing the optimal parameters during SLM, the fabrication of strong and ductile Ti6Al4V alloys was achieved. The ultimate tensile strength of SLM-built Ti6Al4V alloy was measured as 1170 MPa, while the elongation to failure remained over 10%. Through analysis of the microstructure and mechanical properties of the SLM-built Ti6Al4V alloy, it was found that the process parameters play an essential role in the tensile behavior, in particular the ductility of SLM-built Ti alloy. The considerable enhancement of the mechanical properties in our work is mainly attributed to the limitation of martensite formation and the minimization of pores.

引用

页数：8

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