热变形后<b>Ni-30%Fe</b>模型合金中奥氏体的亚动态软化行为

热变形后Ni-30%Fe模型合金中奥氏体的亚动态软化行为

陈文雄¹^,², 胡宝佳¹^,², 贾春妮¹^,², 郑成武¹^,²(

), 李殿中¹^,²

Post-Dynamic Softening of Austenite in a Ni-30%Fe Model Alloy After Hot Deformation

CHEN Wenxiong¹^,², HU Baojia¹^,², JIA Chunni¹^,², ZHENG Chengwu¹^,²(

), LI Dianzhong¹^,²

图3. Ni-30%Fe合金在应变速率 $ε ˙$ =0.001 s^-1、温度T=900 ℃条件下等温热压缩变形时的应力-应变曲线(虚线)及初始应变分别为0.3和0.8条件下不同保温时间后第2道次压缩变形时的应力-应变曲线(实线)

Fig.3. Flow curve of the hot deformation of the Ni-30%Fe model alloy at temperature T=900 ℃, strain rate $ε ˙$ =0.001 s^-1 (dash line), and flow curves of the second-pass deformation after different annealing time at the first strains of 0.3 and 0.8, respectively (solid lines)