U.S.-China Cooperative Research (Materials Science): Casting Defect Formation Including Hot Tearing

这是2。美国密歇根大学材料科学与工程系Robert D. Pehlke与哈尔滨工业大学金属材料与技术系铸造部李庆春的年度合作研究项目，哈尔滨，中国。该项目由美国国家科学基金会和哈尔滨工业大学联合资助。研究项目将集中于铸件缺陷的形成，重点是热撕裂。几个面前。将解决线路研究问题，包括(1)测量绿砂和干砂的抗压强度/阻力；(2)砂/金属界面摩擦行为的定量估计或测量；(3)确定/估计更准确的断裂或撕裂标准；(4)绝对熔化温度80%及以上的铸造合金力学性能测定。断裂标准的评估将在密歇根大学进行，选定合金的高温机械性能测量将在哈尔滨工业大学进行研究。高温砂的特性和砂/金属界面的摩擦行为的其他问题将由两个机构的小组共同承担。该项目的目标是为密歇根大学自1979年以来在计算机领域得到美国国家科学基金会支持的一项重大研究活动做出贡献。铸件辅助设计。这项研究也将有助于哈尔滨工业大学正在进行的研究。

This is a two.year collaborative research project between Robert D. Pehlke of the Department of Materials Science and Engineering, University of Michigan, and Li Qingchun of the Casting Division of the Department of Metallic Materials and Technology of the Harbin Institute of Technology, Harbin, China. The project is sponsored jointly by NSF and the Harbin Institute of Technology. The research program will focus on defect formation in castings with an emphasis on hot tearing. Several front.line research issues will be addressed, including (1) measurements of compressive >strength/resistance of green and dry sands; (2) quantitative estimates or measurements of frictional behavior at the sand/metal interface; (3) >determination/estima>tion of more accurate fracture or tearing criteria; and (4) mechanical property measurements of casting alloys at and above 80 percent of the absolute melting temperature. The assessment of fracture criteria would be undertaken at the University of Michigan, and the high temperature mechanical property measurements for selected alloys would be studied at the Harbin Institute of Technology. The other issues of high temperature sand properties and the frictional behavior at the sand/metal interface would be jointly undertaken by groups at both institutions. The goal of this project is to contribute to a major research activity conducted at the University of Michigan with NSF support since 1979 in the field of computer.aided design for castings. The research will also contribute to ongoing research at the Harbin Institute of Technology.