片层晶粒体积分数对双态组织γ-TiAl基合金室温力学性能的影响

中国有色金属学报, 2003, 13(2): 448-453.

片层晶粒体积分数对双态组织γ-TiAl基合金室温力学性能的影响

郑瑞廷 ^1, , 张永刚 ^2, , 陈昌麒 ^3, , 程国安 ^4,

1.北京师范大学,射线束技术与材料改性教育部重点实验室,北京,100875;北京航空航天大学,材料科学与工程系,北京,100083

2.北京航空航天大学,材料科学与工程系,北京,100083

3.北京航空航天大学,材料科学与工程系,北京,100083

4.北京师范大学,射线束技术与材料改性教育部重点实验室,北京,100875

基金项目: 国家自然科学基金(59895150)

关键词： γ-TiAl基金属间化合物 , 双态组织 , 力学性能

Effects of volume fraction of lamellar grain and strain rate on mechanical properties of duplex TiAl-based alloy

对热等静压后的Ti-46.5Al-2Cr-1.5Nb-1V合金进行了热处理,获得了一系列含有不同片层晶粒体积分数的双态组织.室温拉伸实验结果表明,片层晶粒体积分数对双态组织TiAl合金的性能影响很大.在应变速率一定的情况下,片层晶粒体积分数的增加会导致双态组织TiAl合金屈服强度的增加以及室温塑性的降低.在近γ组织中,室温塑性随着应变速率的增加而增加,原因主要是在应变速率较高时,有较多的孪晶系开动.

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片层晶粒体积分数对双态组织γ-TiAl基合金室温力学性能的影响

Effects of volume fraction of lamellar grain and strain rate on mechanical properties of duplex TiAl-based alloy

参考文献