Effect of pore structure on mechanical properties of porous TiAl

Based on two sets of TiAl powder, two kinds of porous TiAl were separately fabricated by powder metallurgical route including four stages. The porous TiAl with single pore structure (SPS) was prepared using pre-alloyed TiAl powder prior mechanical ball milling. Another porous TiAl with composite por...

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Bibliographic Details
Published inMaterials science and technology Vol. 32; no. 15; pp. 1592 - 1596
Main Authors Hao, G. L., Xu, Q. P., Wang, H., Li, X. Y.
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 12.10.2016
SAGE Publications
Subjects
Mechanical property
Microstructure
Sintering
TiAl porous materials
TiAl porous materials
Microstructure
Sintering
Mechanical property
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Summary:Based on two sets of TiAl powder, two kinds of porous TiAl were separately fabricated by powder metallurgical route including four stages. The porous TiAl with single pore structure (SPS) was prepared using pre-alloyed TiAl powder prior mechanical ball milling. Another porous TiAl with composite pore structure (CPS) was manufactured depending on composite mixture of Ti/Al elemental powders. The sintering was achieved at much lower temperature for the pre-alloyed power than for the elemental composite mixture. Compressive mechanical tests indicate that much higher mechanical strength can be obtained for SPS than for CPS at the same porosity. It was suggested that the difference of mechanical properties is ascribed to the variety of the compressive deformation process.
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2015.1132588