Thermal stability of multi-spray<BR> deposition heat resistant<BR>Al-Fe-V-Si alloy

ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 12 No. 2 April 2002

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Thermal stability of multi-spray
deposition heat resistant
Al-Fe-V-Si alloy

LU Bin(卢斌), YI Dan-qing(易丹青), LI Wen-xian(黎文献),
YU Zhi-ming(余志明), ZHOU Lin(周琳)

(Department of Materials Science and Engineering,
Central South University, Changsha 410083, China)

Abstract: Rapidly solidified Al-8.4Fe-1.3V-1.7Si heat resistant alloy was made by using multi-layer spray deposition technique. Its thermal stability of mechanical properties was investigated by the means of tensile and hardness tests, thermal stability of microstructure by transmission electron microscopy (TEM), X-ray dif fraction (XRD). The results show that after heat exposure (HE) at 753K for 500h the tensile strength and hardness of Al-Fe-V-Si alloy at 623K maintains the same values as those at room-temperature. HE dose not obviously affect the thermal stabilities of Al₁₂(Fe,V)₃Si phase but the lattice constant of Al₁₂(Fe,V)₃Si phase decrease.

Key words: heat resistant Al alloys; heat exposure; microstructure; metastable phase; mechanical property

Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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