Effect of test-piece-preparation method on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting

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  • 電子ビーム積層造形で作製したチタンアルミ合金の力学特性へ及ぼす試験片作製法の影響

Abstract

<p>TiAl has been applied to turbine blades in aerospace industry, because it is a promising lightweight material with high strengths at high temperature. In recent years, production method of TiAl by additive manufacturing has been studied. In this research, the effect of dimensions of TiAl specimens by additive manufacturing had on the tensile and creep properties was studied. It was confirmed that the near-net specimen showed higher tensile strengths and lower creep resistance and life than the specimen cut from the block. This difference would be due to the difference in microstructure caused by the powder melting process including hatching to melt inside the cross section and contouring perimeter.</p>

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