MICROSTRUCTURE AND MECHANICAL PROPERTIES OF NOVEL 718 SUPERALLOY
来源期刊：Acta Metallurgica Sinica2006年第6期
论文作者：J.L. Qu X.D. Lü Q. Deng Z.Y. Zhong J.H. Du J.Y. Zhuang
Key words：novel 718 superalloy; microstructure; mechanical property; stress rupture; creep;
Abstract: Recently, a novel 718 superalloy with remarkable structural stability at 680℃ has been designed and fabricated by CISRI (Central Iron and Steel Research Institute) etc. Phase identification of novel 718 alloy under the above-mentioned heat-treatment condition was performed using optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results show that the novel 718 alloy has outstanding structural stability at 680℃. The novel 718alloy possess excellent structural stability and good mechanical properties, which is attributed to y-phase strengthening and also to the specific sandwich structure of the γ′ + γ" strengthening phase.
J.L. Qu1，X.D. Lü1，Q. Deng1，Z.Y. Zhong1，J.H. Du1，J.Y. Zhuang1
(1.Department of Superalloy, Central Iron and Steel Research Institute, Beijing 100081, China)
Abstract:Recently, a novel 718 superalloy with remarkable structural stability at 680℃ has been designed and fabricated by CISRI (Central Iron and Steel Research Institute) etc. Phase identification of novel 718 alloy under the above-mentioned heat-treatment condition was performed using optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results show that the novel 718 alloy has outstanding structural stability at 680℃. The novel 718alloy possess excellent structural stability and good mechanical properties, which is attributed to y-phase strengthening and also to the specific sandwich structure of the γ′ + γ" strengthening phase.
Key words:novel 718 superalloy; microstructure; mechanical property; stress rupture; creep;
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