检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:姜华[1] 李相辉[1] 盖其东[1] 陈昊 JIANG Hua;LI Xiang-hui;GAI Qi-dong;CHEN Hao(Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Beijing 100095,China;The Sixth Military Representative Office of the Military Equipment Department in Beijing,Beijing 100024,China)
机构地区:[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095 [2]空军装备部驻北京地区第六军事代表室,北京100024
出 处:《铸造》2019年第6期574-577,共4页Foundry
摘 要:采用扫描电子显微镜(SEM)、电子探针(EPMA)和拉伸性能测试等手段,研究了搅动法细晶铸造K492M合金的显微组织和拉伸性能。显微组织观察表明,铸态组织主要包括γ基体、γ′相、碳化物及γ/γ′共晶;热处理后,合金枝晶干和枝晶间处的γ′相由大、小两种尺寸组成,共晶组织未完全溶于基体;碳化物沿晶界析出,呈链状分布。合金在750℃的抗拉强度和伸长率分别为(1157±12)MPa和(9.1±2)%。抗拉断口SEM观察显示,断裂机理主要为韧窝断裂。The microstructure and tensile properties of K492 alloy produced by the mould agitation have been investigated by means of SEM (Scanning Electron Microscope), EPMA (Electrical Probe Metal Analysis) and mechanical test in the present study. The microstructure observation reveals that the as-cast microstructure with refined grains is composed of γ matrix,γ′ phase, MC carbide and γ/γ′ eutectic;after solid solution heat treatment,γ' precipitates with two obviously distinct size existed in the dendrite core and interdendritic region. Fine carbides precipitate along the grain boundary and γ/γ′ eutectic phase incompletely dissolve in matrix. Tensile properties at 750 ℃ were measured, and results obtained show that tensile strength and elongation are (1 157±12)MPa and(9.1±2)%, respectively. Furthermore, tensile fractured surfaces examined under SEM show that the deformation mechanism at 750 ℃ is dimple fracture.
分 类 号:TG132.32[一般工业技术—材料科学与工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.74