Compression properties and work-hardening effect of the NiAl-matrix composite with TaB₂ and TaB

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• 作者：H.L. Zhao ; F. Qiu ; S.B. Jin ; Q.C. Jiang ; ^{jqc@jlu.edu.cn}
• 关键词：A. Nickel aluminides ; based on NiAl ; B. Work-hardening ; D. Microstructure ; F. Mechanical testing
• 刊名：Intermetallics
• 出版年：2012
• 期刊代码：36_09669795
• 类别：ms
• 出版时间：August, 2012
• 卷：27
• 期：Complete
• 页码：1-5
• 文件大小：1093 K

摘要

The microstructure, compression property and work-hardening effect of the NiAl-matrix composite reinforced by 5 vol.%ceramic particulates (TaB and TaB₂) were investigated. The compression properties and work-hardening capacity (H_c) under the different strain rates were also investigated. The NiAl-matrix composite has strong strain rate sensitivity. A high true ultimate strength of 1399聽MPa, a true fracture strain of 18.7%and H_c聽=聽1.84 were obtained under the strain rate of 1.0聽脳聽10^鈭?聽s^鈭?. The good compression properties may be attributed to the refinement of the grain size and the good combination between the ceramic particulates and the NiAl-matrix.