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Hot Compression Behaviors of C_(sf)/Mg Composite and Its Constitutive Relation

ZHANG Liang;WANG Zhenjun;SHANG Hongfu;ZHU Shixue;National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University;  
Csf/Mg composite prepared by vacuum infiltration method was hot compressed on Gleeble1500 D simulator.The plastic deformation behavior was investigated at 596-696 K, strain rate of 5×10-3- 5×10-1s-1and the largest true strain of0.6. According to the experiment results, a strain compensated constitutive model was established by multivariate nonlinear regression method. The disadvantage of Arrhenius model only calculating the peak stress and steady state stress was overcomed. The results show the average error of the flow stress calculated by the established constitutive model and the experiment one is only 8.95%,and then the correlation coefficient is 0.9549.
【Fund】: 国家自然科学基金资助项目(51365043);; 西北工业大学凝固技术国家重点实验室开放基金资助项目(SKLSP201228);; 南昌航空大学轻合金加工科学与技术国防重点学科实验室开放基金资助项目(GF201301007)
【CateGory Index】: TB333;TB302
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