刊名:Journal of Iron and Steel Research, International
出版年:2016
出版时间:December 2016
年:2016
卷:23
期:12
页码:1297-1302
全文大小:2078 K
卷排序:23
文摘
The hot deformation behavior of Ti-5. 6Al-4. 8Sn-2. 0Zr-l. 0Mo-0. 35Si-0. 85Nd alloy in β/quasi-β forging process was studied using isothermal compression tests over temperature range from 1040 °C to 1100 °C and strain rates form 0. 001 s−1 to 70 s−1. The results show that the flow stress and microstructure are sensitive to thermomechanical parameters. The processing maps based on the dynamic materials model at strain of 0. 3 and 0. 7 were established. The optimum deformation thermomechanical parameters at a strain of 0. 7 have two regions that exhibit the peak of power dissipation efficiency. One is the region of 1062–1100 °C and 10−3–10−1.5 s−1; and another which represents dynamic recrystallization is 1040–1045 °C and 10−18–10−09 s−1. The instable region is located where the strain rate is larger than 1 s−1 which corresponds to the mechanical instability.