Transactions of Materials and Heat Treatment

Title：Research on material constant values of TiB_2/Al during elevated temperature tensile test

Authors： GUO Sheng-li1 LI De-fu1 CHEN Dong2 WANG Hao-wei2(1. Processing Engineering Research Center General Research Institute for Nonferrous Metals Beijing 100088 China 2. State Key Laboratory of Metal Matrix Composite Shanghai Jiaotong University Shanghai 20

Unit：

KeyWords： in-situ TiB2/6351 composite flow stress Zener-Hollomon parameter deformation activation energy

ClassificationCode：TB331

year,vol(issue):pagenumber：2009,34(3):18-21

Abstract：

The elevated temperature tensile test of in-situ TiB2(mass fraction is 8%)/6351 Al composites was carried out in the range of deformation temperature 350-500℃and strain rate 0.0001-1s-1. The material constant values were studied using a hyperbolic sine model. The results show that the hyperbolic sine can satisfactorily describe the correlation between flow stress σP and Z parameter. The values of A , α and n in the analytical expressions of flow stress σP are fitted to be 605.5×1012 s-1,0.027MPa-1 and 10.018. The hot deformation activation energy in Z parameter expression is 256.78kJ·mol-1.

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Reference：

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