Microstructure and Mechanical Properties of Novel 718 Superalloy

Acta Metallurgica Sinica (English Letters) ›› 2006, Vol. 19 ›› Issue (6): 418-424 .

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Microstructure and Mechanical Properties of Novel 718 Superalloy

J.H. Du, X.D. Lü, J.L. Qu,,,

Department of superalloy, Central Iron and Steel Research Institute

Received:2006-04-12 Revised:2006-08-23 Online:2006-12-25 Published:2009-10-10

Abstract

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 718 alloy possess excellent structural stability and good mechanical properties, which is attributed to ?酌'-phase strengthening and also to the specific sandwich structure of the ?酌' ＋ ?酌'' strengthening phase.

Key words: novel 718 superalloy, microstructure, mechanical property,

J.H. Du, X.D. Lü, J.L. Qu. Microstructure and Mechanical Properties of Novel 718 Superalloy[J]. Acta Metallurgica Sinica (English Letters), 2006, 19(6): 418-424 .

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Microstructure and Mechanical Properties of Novel 718 Superalloy

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