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《High Power Laser & Particle Beams》 2002-02
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Experimental study of effect of heating speed on mechanical properties of LY12 aluminum alloys

YANG Yun min 1, CHEN Yu ze 2, YIN Yi hui 2, PENG Xiang he 1, WANG Jun 1,2 (1. College of Civil Engineering ,Chongqing University, Chongqing 400044, China; 2. Institute of Structure Mechanics, CAEP, Mianyang 621900, China)  
A systematic investigation to the responses of specimens made of LY12 aluminum alloy subjected to different levels of pre load and heated with different heating rate is performed using a Gleeble 1500 thermal mechanical material testing system. The near tip metallurgraphics is also observed and analyzed. The investigation results show that both temperature and heating rate play significant roles in the mechanical behavior of LY12. For the same level of pre load, an increase in heating rate will increase both the yield and fracture temperature, and the high heating rate induced inconsistence of local temperature accounts for the severe defect in the material and the failure of the meterial.
【Fund】: 国家自然科学基金 ( 196 72 0 5 9)资助项目 ;; 中国工程物理研究院基金 ( 980 30 412 )
【CateGory Index】: TG115
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