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Superplastic deformation of in situ synthesized TiC/7715D matrix composite

机译：原位合成TiC / 7715D基复合材料的超塑性变形

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摘要

The in situ synthesized TiC/7715D titanium matrix composite has been prepared and its superplasticity has been studied. A maximum elongation of 802% was obtained and different types of true strain-true stress curves were observed. The superplastic average activation energies involved were calculated as 366 and 625 kJ/mol, indicates that the deformation mechanism attributes to mainly dynamic recovery (DR) concurrent with grain boundary sliding (GBS)/grain coarsening (Growth) controlled by grain boundary diffusion and dynamically recrystallization (DRX) predominant concurrent with GBS/Growth controlled by lattice diffusion, respectively. They were verified by microstructures observed by optical microscopy (OM) and transmission electron microscopy (TEM).
机译：制备了原位合成的TiC / 7715D钛基复合材料，并对其超塑性进行了研究。获得的最大伸长率为802％，并观察到不同类型的真实应变-真实应力曲线。计算出的超塑性平均活化能分别为366和625 kJ / mol，表明变形机理主要归因于动态恢复（DR）以及受晶界扩散控制的晶界滑动（GBS）/晶粒粗化（Growth）的动态变化。重结晶（DRX）主要与通过晶格扩散控制的GBS /生长同时发生。通过光学显微镜（OM）和透射电子显微镜（TEM）观察到的微观结构验证了它们。

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  • 来源
    《Materials Science and Engineering》 |2009年第2009期|384-388|共5页
  • 作者

    Li Li; Weijie Lu; JiningQin; Yifei Chen; DiZhang; Minmin Wang; FengZhu; Bo Ji;

  • 作者单位

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Dongchuan Road 800#, Shanghai 200240, People's Republic of China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Dongchuan Road 800#, Shanghai 200240, People's Republic of China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Dongchuan Road 800#, Shanghai 200240, People's Republic of China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Dongchuan Road 800#, Shanghai 200240, People's Republic of China;

    State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Dongchuan Road 800#, Shanghai 200240, People's Republic of China;

    Department of Titanium Alloy, Special Steel Branch, Baoshan Iron and Steel Co. Ltd., Shanghai 200940, People's Republic of China;

    Department of Titanium Alloy, Special Steel Branch, Baoshan Iron and Steel Co. Ltd., Shanghai 200940, People's Republic of China;

    Department of Titanium Alloy, Special Steel Branch, Baoshan Iron and Steel Co. Ltd., Shanghai 200940, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    superplasticity; secondary work hardening; titanium matrix composite; activation energy; GBS; DRX;

    机译：超塑性二次加工硬化;钛基复合材料活化能;GBS;DRX;

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