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Abstract：
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Elevated temperature tensile test was used to investigate the influence of forming parameters on deformation behavior of TC4,and the optimal deformation condition was identified,that is: pre-heating(and holding) at 900 ℃ for 15 min,forming at 900 and with an initial strain rate of 5×10-3s-1.It was found that for commercial production,the suitable processing window can be slightly adjusted or widened: the holding time can be prolonged to 30 min,the temperature can be raised from 900 to 920 ℃,and the initial strain rate can be increased from 1×10-3 to 1×10-2 s-1.OM and SEM was used to analyze the microstructure evolution under different holding time,original strain rates and temperatures.The microstructure of different strain and the fractograph of different temperature were also presented.The result indicates that the part can deform in high strain rate range under longer holding time and higher temperature,so the production efficiency is improved.At last,the internality reason of that deformation condition was presented from microstructure study.
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Reference：
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