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放电等离子烧结TiAl基合金的显微组织及力学性能

Xin LU,Xinbo HE,Shiqiong LI,Xuanhui QU

Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing（2008）

Cited 6|Views2
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Abstract
以Ti-47.5Al-2.5V-1.0Cr合金粉末为原料,采用放电等离子烧结工艺制备出TiAl基合金,并研究了制备工艺、显微组织与室温力学性能三者的关系.结果表明,采用放电等离子烧结方法可制备出致密度高、组织均匀的TiAl基合金.烧结温度对合金的显微组织影响显著,且其室温力学性能与显微组织密切相关,显微组织越细小,室温强度和塑性越高.当烧结温度为1100℃时,制备出的TiAl-V-Cr合金显微组织类型为细小双态组织,具有35.2%的压缩率和3321MPa的断裂强度,显示出较好的室温压缩性能.
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Key words
Mechanical properties,Microstructure,Spark plasma sintering (SPS),TiAl based alloy
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