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Appl. Sci. 2016, 6(3), 70; doi:10.3390/app6030070

Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents

Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohisung 807, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Chien-Hung Liu
Received: 21 December 2015 / Revised: 13 February 2016 / Accepted: 15 February 2016 / Published: 2 March 2016
(This article belongs to the Special Issue Selected Papers from the 2015 International Conference on Inventions)
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Abstract

The deformation behavior and fracture characteristics of NiAl intermetallic alloy containing 5~7 at% Cu are investigated at room temperature under strain rates ranging from 1 × 103 to 5 × 103 s1. It is shown that the copper contents and strain rate both have a significant effect on the mechanical behavior of the NiAl alloy. Specifically, the flow stress increases with an increasing copper content and strain rate. Moreover, the ductility also improves as the copper content increases. The change in the mechanical response and fracture behavior of the NiAl alloy given a higher copper content is thought to be the result of the precipitation of β-phase (Ni,Cu)Al and γ'-phase (Ni,Cu)3Al in the NiAl matrix. View Full-Text
Keywords: intermetallic; NiAl alloy; strain rate effect; fracture properties; precipitate intermetallic; NiAl alloy; strain rate effect; fracture properties; precipitate
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Chen, T.-H.; Wu, J.-H. Mechanical Behavior and Fracture Properties of NiAl Intermetallic Alloy with Different Copper Contents. Appl. Sci. 2016, 6, 70.

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