Tensile Properties and Microstructure of DS NiAl-28Cr-5.8Mo-0.2Hf Alloy

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J Mater Sci Technol ›› 2002, Vol. 18 ›› Issue (02): 181-184.

• Research Articles • Previous Articles Next Articles

Tensile Properties and Microstructure of DS NiAl-28Cr-5.8Mo-0.2Hf Alloy

Chuanyong CUI, Jianting GUO, Yihui QI, Hengqiang YE

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:1900-01-01 Revised:1900-01-01 Online:2002-03-28 Published:2009-10-10
Contact: Jianting GUO

Abstract

Abstract: A multiphase alloy NiAl-28Cr-5.8Mo-0.2Hf was directionally solidified in Ar atmosphere in an Al2O3-SiO2 mold by standard Bridgman method. The fracture toughness and tensile properties at 980ºC as well as tensile creep at 1050℃ were studied. It was found that the strength of the present alloy is higher than that of many NiAl-based alloy and the stress exponent n for creep is about 6.69. Then the possible strengthening mechanism and creep mechanism are also discussed.

Key words: Intermetallic NiAl, Microstructure, Mechanical properties

Chuanyong CUI, Jianting GUO, Yihui QI, Hengqiang YE. Tensile Properties and Microstructure of DS NiAl-28Cr-5.8Mo-0.2Hf Alloy[J]. J Mater Sci Technol, 2002, 18(02): 181-184.

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Tensile Properties and Microstructure of DS NiAl-28Cr-5.8Mo-0.2Hf Alloy

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