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




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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

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





Autor: Diantao Zhang 1,2, Mohamed Osman 1,2,* , Li Li 1,2, Yufeng Zheng 3 and Yunxiang Tong 1,2,*

Fuente: http://mdpi.com/



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