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Metals 2016, 6(3), 45; doi:10.3390/met6030045

Simulation and Experimental Investigation for the Homogeneity of Ti49.2Ni50.8 Alloy Processed by Equal Channel Angular Pressing

1
Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
2
Center for Biomedical Materials and Engineering, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
3
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Ana Sofia Ramos
Received: 12 January 2016 / Revised: 2 February 2016 / Accepted: 15 February 2016 / Published: 25 February 2016
(This article belongs to the Special Issue Intermetallics 2016)
View Full-Text   |   Download PDF [2232 KB, uploaded 25 February 2016]   |  

Abstract

Ti49.2Ni50.8 shape memory alloy (SMA) was processed by equal channel angular pressing (ECAP) for eight passes at 450 °C. The deformation homogeneity was analyzed on various planes across the thickness by Deform-3D software. Strain standard deviation (SSD) was used to quantify deformation homogeneity. The simulation result shows that the strain homogeneity is optimized by the third pass. Deformation homogeneity of ECAP was analyzed experimentally using microhardness measurements. Experimental results show that the gradual evolution of hardness with increasing numbers of passes existed and the optimum homogeneity was achieved after three passes. This is in good agreement with simulation results. View Full-Text
Keywords: TiNi shape memory alloy; equal channel angular pressing; finite element method; strain homogeneity; microhardness TiNi shape memory alloy; equal channel angular pressing; finite element method; strain homogeneity; microhardness
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Zhang, D.; Osman, M.; Li, L.; Zheng, Y.; Tong, Y. Simulation and Experimental Investigation for the Homogeneity of Ti49.2Ni50.8 Alloy Processed by Equal Channel Angular Pressing. Metals 2016, 6, 45.

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