Microstructure and mechanical properties of selective laser melted Ti6Al4V alloy

被引：21

作者：

Losertova, M. ^{[1
]}

Kubes, V. ^{[1
]}

机构：

[1] VSB Tech Univ Ostrava, Fac Met & Mat Engn, 17 Listopadu 15, Ostrava 70833, Czech Republic

来源：

27TH JOINT SEMINAR DEVELOPMENT OF MATERIALS SCIENCE IN RESEARCH AND EDUCATION | 2017年 / 266卷

关键词：

Selective laser melting; Ti6Al4V; Microstructure; Porosity; Mechanical properties; TITANIUM-ALLOYS; HEAT-TREATMENT;

D O I：

10.1088/1757-899X/266/1/012009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work was focused on the properties of porous Ti6Al4V specimens processed by selective laser melting (SLM) and tested in tension and compression before and after heat treatment. The SLM samples were annealed at 955 degrees C, water quenched and aged at 600 degrees C with following air cooling. The values of the mechanical tests showed that the samples exhibited high mechanical properties. The anisotropy of tensile and compressive strength was observed, which was related to the occurrence of voids. The plastic properties of specimens were improved by means of the heat treatment that led to the transformation of martensitic to lamellar structure composed of alpha + beta phases. The microstructure of SLM samples were evaluated before and after the heat treatment. The brittle nature of failures of non-heat treated samples can be explained by synergy of martensite presence, microcracks and residual stresses produced by SLM.

引用

页数：6

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