Mechanical behavior of porous commercially pure Ti and Ti-TiB composite materials manufactured by selective laser melting

被引：232

作者：

Attar, H. ^{[1
,2
]}

Loeber, L. ^{[2
]}

Funk, A. ^{[2
]}

Calin, M. ^{[2
]}

Zhang, L. C. ^{[1
]}

Prashanth, K. G. ^{[2
]}

Scudino, S. ^{[2
]}

Zhang, Y. S. ^{[3
]}

Eckert, J. ^{[2
,4
]}

机构：

[1] Edith Cowan Univ, Sch Engn, Perth, WA 6027, Australia

[2] IFW Dresden, Inst Complex Mat, D-52425 Dresden, Germany

[3] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China

[4] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 625卷

基金：

澳大利亚研究理事会;

关键词：

Mechanical behavior; Porous Ti; Porous Ti-TiB composite; Selective laser melting; BIOMEDICAL TI-24NB-4ZR-8SN ALLOY; COMMON CASTING TECHNIQUE; MATRIX COMPOSITES; POWDER-METALLURGY; MICROSTRUCTURAL CHARACTERIZATION; COMPRESSIVE PROPERTY; WEAR PERFORMANCE; TITANIUM-ALLOY; BIOMATERIALS; DENSIFICATION;

D O I：

10.1016/j.msea.2014.12.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Commercially pure titanium (CP-Ti) and Ti-TiB composite parts with three different porosity levels (i.e. 10%, 17% and 37%) were produced by selective laser melting (SLM). Scanning electron microscopy (SEM) investigations show that martensitic (alpha') microstructure exists in SLM-processed CP-Ti parts, whilst SLM-processed Ti-TiB composites present needle-shape TiB particles distributed in alpha-Ti matrix. Mechanical properties of these porous samples decrease with porosity level increasing. The yield strength and elastic modulus of porous CP-Ti parts range 113-350 MPa and 13-68 GPa respectively, which are much lower than those for porous Ti-TiB counterparts (234-767 MPa and 25-84 GPa respectively) mainly due to the strengthening effect induced by TiB particles in Ti-TiB samples. Compression stress-strain curves of 37% porous CP-Ti parts show a typical three-stage behavior of ductile porous metals. Also, the elastic moduli of both 37% porous CP-Ti and Ti-TiB samples are similar to that of human bone. SEM investigations of the porous CP-Ti samples after compression testing show that no crack presents until 50% compressive strain and most of deformation is absorbed by porous areas. In contrast, mu-CT investigations indicate that all porous Ti-TiB samples fail at early stages of compression testing due to cracks resulting from insufficient ductility of struts of porous areas, because they are not able to accommodate high strains of the deformation at high strengths. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：350 / 356

页数：7

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