Paper Title:

Porous Ti-6Al-4V Alloy Prepared by a Press-and-Sinter Process

Periodical Key Engineering Materials (Volume 520)
Main Theme Powder Metallurgy of Titanium
Edited by Ma Qian
Pages 76-81
DOI 10.4028/www.scientific.net/KEM.520.76
Citation Hai Lian Bi et al., 2012, Key Engineering Materials, 520, 76
Online since August, 2012
Authors Hai Lian Bi, Chang Zhou Yu, Peng Cao, Yue Hui He
Keywords Mechanical Property, Porous Alloy, Powder Sintering, Ti-6Al-4V
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Abstract

This paper reports the synthesis of porous titanium with a nominal composition of Ti-6 wt%Al-4wt%V through a press-and-sinter process. Blended elemental (BE) mixtures of Ti and master alloy Al-40V powders were uniaxially pressed and sintered in vacuum. Porosity of the sintered samples was determined in the range of 23vol. % to 37vol. % by the Archimedes method. Tensile strengths were found to range from 73 to 147MPa and Young’s moduli of the sintered samples varied from 3.4GPa to 13GPa. Both tensile strength and elastic modulus decreased with increasing porosity. Electrochemical assessment of the sintered porous samples showed deteriorated corrosion resistance, as compared to 95% dense Ti-6Al-4V prepared by sintering pre-alloyed powder. The challenge of using blended elemental powder sintering to fabricate porous Ti-6Al-4V alloys is discussed.