Effect of Heat Treatment on Microstructure and Properties of as-Forged TiAl Alloy with ¦Â Phase

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• 作者：Yang Fei^a ; ^b ; ^{fyang0204@hotmail.com} ; Kong Fantao^a ; Chen Yuyong^a ; Xiao Shulong^a
• 关键词：titanium aluminides ; canned forging ; heat treatment ; microstructure and properties
• 刊名：Rare Metal Materials and Engineering
• 出版年：2011
• 出版时间：September 2011
• 年：2011
• 卷：40
• 期：9
• 页码：1505-1509
• 全文大小：693 K

文摘

The canned forging pancake of Ti-45Al-5.4V-3.6Nb-0.3Y alloy was prepared, and the microstructure control and properties for various microstructures of as-forged alloy were studied. Three different microstructures, duplex, nearly lamellar and fully lamellar, were obtained through heat treatments. The microstructure evolution was analyzed and tensile properties were measured. The results show that the treated sample with duplex microstructure exhibits the best ductility, and its elongation reaches 1.35 % the alloy with nearly lamellar microstructure has better strength, i.e.yield strength and fracture strength are 605.31 MPa and 665.75 MPa at room temperature, respectively.