吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1197-1201.doi: 10.13229/j.cnki.jdxbgxb201604027

• Orginal Article • Previous Articles     Next Articles

Flow stress behavior of in situ particulate reinforced titanium atrix composite at elevated temperature

LIU Li-ping1, 2, LIU Yong-bing1, JI Lian-feng1, CAO Zhan-yi1, YANG Xiao-hong1   

  1. 1.College of Materials Science and Engineering, Jilin University, Changchun 130022, China;
    2.Department of Engineering and Technology, Changchun Vocational Institute of Technology, Changchun 130033, China
  • Received:2015-08-17 Online:2016-07-20 Published:2016-07-20

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Abstract: The flow stress behavior of an in situ synthesized TiB and TiC reinforced Ti matrix composite was studied by isothermal hot compression tests with temperature ranging from 550 ℃ to 750 ℃ and strain rate from 0.0001 s-1 to 0.0004 s-1. Results show that the flow stress decreases with the increase in temperature, and increases with the increase in strain rate. The softening mechanism during the hot deformation is mainly determined by dynamic recovery with the support of dynamic recrystallization. The constitutive parameters of the composite were calculated on the basis of Arrhenius model and Zener-Hollomon parameter, and the constitutive equation in hyperbolic form was established.

Key words: composite materials, constitutive equation, hot compression test, flow stress behavior

CLC Number: 

  • TG115
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