摘要:为了解700℃超临界电站锅炉过/再热器用主要候选材料Inconel 740H晶界M(23)C6相在蠕变过程中的粗化行为,对通过真空感应熔炼和真空电弧重熔双联工艺制备的合金,在750℃/200 MPa条件下分别开展蠕变中断与蠕变断裂试验,并利用扫描电镜、透射电镜、能谱分析仪等测试方法对晶界M(23)C6相进行表征.采用Image-Pro Plus软件对相参量进行定量统计,进而分析其变化趋势.研究表明:在所研究温度、应力及时间范围内,随着蠕变时间的延长,晶界富Cr的M(23)C6相逐渐由粒状、短棒状发展成为长条、半连续的链状分布;粒子沿平行于晶界方向的长大速率明显高于沿垂直于晶界方向的长大速率,但二者的粗化均表现出尺寸三次方与时间之间呈线性关系的规律;相数量的增加与蠕变时间亦呈线性关系;与尺寸的粗化相比,相数量的增长较为缓慢,外加应力在一定程度上促进了M(23)C6的析出.
注:因版权方要求,不能公开全文,如需全文,请咨询杂志社
热门期刊服务
China Ocean Engineering Journal of Bionic Engineering Earthquake Engineering and Engineering Vibration Chinese Journal of Mechanical Engineering Water Science and Engineering Frontiers of Information Technology Electronic Engineering Chinese Journal of Chemical Engineering International Journal of Computing Journal of Integrative Agriculture International Journal of Oral Science Journal of Beijing Institute of Technology Journal of Systems Engineering and Electronics