Determination of hot deformation behavior and processing maps of IN 028 alloy using isothermal hot compression test
Determination of hot deformation behavior and processing maps of IN 028 alloy using isothermal hot compression test
复制标题
DOI：
10.1016/j.msea.2013.10.051
复制
发表时间：
2014-02
期刊：
影响因子：
6.4
通讯作者：
Chaoyang Sun;Geng Liu;Qingdong Zhang;Rui Li;Liliang Wang
中科院分区：
文献类型：
--
作者：
Chaoyang Sun;Geng Liu;Qingdong Zhang;Rui Li;Liliang Wang
利用等温热压缩试验的加工图，研究了IN 028合金在950 ~ 1150℃温度范围和0.01 ~ 30 s−1应变速率范围内的变形行为。用温度和沾污率对其功耗效率和不稳定性参数进行了评价。功率耗散图显示，在温度950 ~ 1050℃，应变速率0.01 s−1时，存在两个精细动态再结晶畴（DRX），其效率峰值为50%；（ii）温度为1150℃，应变速率为1 s−1，峰值效率为36%，活化能为150 kJ/mol。在低温应变速率大于1 s−1和高温应变速率大于10 s−1时，流动行为的不稳定域也能被识别出来。根据加工图，提出了高温合金in028的最佳热加工条件。加工图预测的特征显微结构与显微结构观测结果吻合较好。
The deformation behavior of IN 028 alloy in the temperature range of 950–1150 °C and strain rate range of 0.01–30 s−1has been studied using processing maps by isothermal hot compression tests. The power dissipation efficiency and instability parameter were evaluated with temperature and stain rate. The power dissipation map reveals that two domains of fine dynamic recrystallization (DRX) exist at the (i) temperature 950–1050 °C and strain rate 0.01 s−1with its peak efficiency of 50%; (ii) temperature 1150 °C and strain rate 1 s−1with its peak efficiency of 36%, with activation energy of 150 kJ/mol. The instability domain of flow behavior can also be recognized at the strain rate more than 1 s−1at lower temperature and strain rate more than 10 s−1at high temperature. The optimum hot working conditions for the superalloy IN 028 are suggested based on the processing map. The characteristic microstructures predicted from the processing map agreed well with the results of microstructural observations.