SAF2205双相不锈钢在高温扭转变形条件下的组织演化（英文）  

Microstructure Evolution of SAF2205 Duplex Stainless Steel During Torsion Deformation at Elevated Temperature

作　　者：张炯炯 姚柯楠 陈汉 朱光 李付国[1] Zhang Jiongjiong;Yao Kenan;Chen Han;Zhu Guang;Li Fuguo(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi＇an 710072, China)

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2018年第6期1689-1694,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51275414)

摘　　要：研究了SAF2205双相不锈钢在高温(600,800和1000℃)扭转变形条件下的微观组织演化。微观组织演化的结果表明,不同程度的再结晶现象出现,对应变形试样中的奥氏体的形貌不同。奥氏体的体积分数随着变形温度的增加而减少。800℃扭转条件下的试样断口形貌和室温下试样断口形貌有很大差异,实验结果表明,当扭转在室温条件下进行时,断口形貌呈现韧性断裂特征,等轴状和抛物线状的韧窝分布在断面上。然而,在800℃条件下扭转的试样的断口形貌主要呈现出沿晶断裂特征。Microstructure evolution of SAF2205 duplex stainless steel during torsion deformation was studied at elevated temperatures（600, 800 and 1000℃）. The results indicate that different degrees＇ recrystallization phenomena appear and the morphology of austenite is different for the deformed samples. The volume fraction of austenite decreases with the increase of deformation temperature. The fracture morphology of the deformed sample at 800℃ is quite different from that of deformed sample at room temperature. The ductile fracture occurs when the torsion is carried out at the room temperature. Also, the equiaxed and parabolic dimples are observed on fracture surface. However, the fracture morphology of the deformed sample at 800℃ is mainly covered by the intergranular fracture.

关 键 词：热扭 SAF2205双相不锈钢 微观组织演化 断口形貌 

分 类 号：TG142.71[一般工业技术—材料科学与工程]