标题：Topologically close-packed phase precipitation in Ni-based superalloys
作者：Sun, Fei; Zhang, Jianxin
作者机构：[Sun, Fei; Zhang, Jianxin] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China.
会议名称：International Conference on Key Engineering Materials and Computer Science (KEMCS 2011)
会议日期：AUG 06-07, 2011
来源：KEY ENGINEERING MATERIALS AND COMPUTER SCIENCE
关键词：Superalloys; TCP phases; Ruthenium (Ru); Refractory elements;; Segregation
摘要：The addition of refractory elements is effective in improving the comprehensive performance of Ni-based superalloys, and meanwhile, the precipitation trend of TCP phases increases with the elements content due to the segregation of refractory elements during high temperature service. The precipitation of TCP phases obviously decreased the creep properties and creep rupture life of superalloys. The toughness and plastic of superalloys also dramatically deteriorated. The addition of Ruthenium (Ru) is shown to suppress the formation of TCP phases in Ni-based superalloys, resulting in much improved the creep resistance and the microstructural stability. The studies on TCP phases in Ni-based superalloys including crystallography and precipitation of TCP phases and the effect of alloy composition on TCP phases are reviewed.