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粉末冶金TiAl基合金顯微組織及力學性能的研究
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TF125.22 TG146.23

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國家863高技術新材料委員會資助!項目 (批準號 :71 5- 0 0 5- 0 0 4 0 )


Investigation of the Microstructures and Mechanical Properties of P/M TiAl-Based Alloys
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    摘要:

    采用粉末冶金方法制備多種成分的ＴｉＡｌ基合金，并研究其顯微組織及室溫、高溫力學性能，結(jié)果表明，采用粉末冶金方法能制備成分均勻、顯微組織細小的Ｔｉ－Ａｌ－Ｃｒ－Ｎｂ系列合金。添加合金元素對粉末冶金ＴｉＡｌ基合金的顯微組織具有顯著影響。粉末冶金ＴｉＡｌ基合金的力學性能與其顯微組織有密切的關系，顯微組織越細小，其室溫強度及延性越高，但在高溫下，其屈服強度隨晶粒尺寸增加而增加。所制備出的Ｔｉ－４７Ａｌ－３

    Abstract:

    The TiAl based alloys with various compositions were prepared by powder metallurgy(P/M), and their microstructures and mechanical properties studied. It was shown that homogeneous Ti Al Cr Nb alloys with fine microstructures can be obtained by means of powder metallurgy. The addition of alloying elements has a significant effect on the microstructure; for example additions of Cr and B will refine the grain size. The mechanical properties of the P/M Ti Al based alloys are related to their microstructures. The finer the microstructure, the higher the room temperature strength and ductility. At high temperatures the strength increases with increasing grain size. P/M processed Ti 47Al 3Cr was found to have good room temperature properties : an ultimate strength of 526 MPa and an elongation of 1 5%.

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劉詠 黃伯云.粉末冶金TiAl基合金顯微組織及力學性能的研究[J].稀有金屬材料與工程,2000,(4):251~254.[Liu Yong, Huang Baiyun, Zhou Kechao, He Yuehui. Investigation of the Microstructures and Mechanical Properties of P/M TiAl-Based Alloys[J]. Rare Metal Materials and Engineering,2000,(4):251~254.]
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