[G] Mechanical Properties of Materials and Sturucture

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[38] Effect of Microstructure Factor on Room-temperature Fracture Toughness of β-Ti Containing γ-TiAl Alloys

*YAMAGATA Ryosuke¹, NAKASHIMA Hirotoyo¹, TAKEMAYA Masao¹ (1. School of Materials and Chemical Technology, Tokyo Institute of Technology)

Keywords:

TiAl基合金,室温破壊靱性,組織制御

β-Ti相を含むTiAl基合金中のβ/α₂/γ粒界組織の体積率を状態図に基づいて制御し，室温破壊靱性と組織因子の関係を調査した．結果，粒界上におけるγ相体積率の増加は破壊靱性の低下を招くことを明らかにした．