Development of a Nickel-base Cast Superalloy with High Strength and Superior Creep Properties

查看全文 作　　者：Jieshan HOU, Jianting GUO, Lanzhang ZHOU and Zhijun LI Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 出　　处：《Journal of Materials Science & Technology》索引2005年第21卷第3期,共6页 摘　　要：Derived from Russian alloy CHS88U, six experimental Ni-base alloys named as A to F in the Ni-Cr-Co-W-Ti-Al-Hf system are designed, evaluated and processed. One of these alloys, F, shows excellent high temperature tensile strength and ductility with superior creep rupture properties. As predicted by using modeling tools such as PHACOM and NEW PHACOMP, there is hardly the tendency for formation of topologically close-packed phase (TCP) phase in alloy F. Furthermore, through microstructural observation, it is also found that no TCP phase is formed in alloy F after long-time exposure at high temperature. So alloy F has well balance of phase stability and mechanical properties in view of application for gas turbines. It is proved that d-electron approach can be applied for design and development of nickel-base superalloys for gas turbine application. 关 键 词：镍超级合金 抗张强度 蠕变寿命 PHACOMP