INFLUENCE OF ASSOCIATED AND SEPARATE PRECIPITATION OF γ″ AND γ′ ON STRUCTURE STABILITY IN INCONEL718 AND MODIFIED ALLOYS

Acta Metallurgica Sinica (English Letters) ›› 1993, Vol. 6 ›› Issue (6): 410-414.

• Research paper • Previous Articles Next Articles

INFLUENCE OF ASSOCIATED AND SEPARATE PRECIPITATION OF γ″ AND γ′ ON STRUCTURE STABILITY IN INCONEL718 AND MODIFIED ALLOYS

Received:1993-12-25 Revised:1993-12-25 Online:1993-12-25 Published:2009-10-10

Abstract

Abstract: The precipitation behavior in Inconel 718 and modified alloys has been studied by means of TEM.The structure of associated precipitation and compact morphology of γ″+γ′ were ob- tained by modifying the contents of Al,Ti and Nb.Experimental results show that the com- pact morphology of γ″+γ′ has the best structure stability at higher temperatures.Instead of the transformation γ″→δ in alloy 718 the dissolution of strengthening phases in modified alloy leads material degradation.

Key words: superalloy, structure stability, associated precipitation, compact morphology, Inconel 718

DONG jianxin XIE Xishan ZHANG Shouhua University of Science and Technology Beijing,Beijing,China doctorate student,Department of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China. INFLUENCE OF ASSOCIATED AND SEPARATE PRECIPITATION OF γ″ AND γ′ ON STRUCTURE STABILITY IN INCONEL718 AND MODIFIED ALLOYS[J]. Acta Metallurgica Sinica (English Letters), 1993, 6(6): 410-414.

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INFLUENCE OF ASSOCIATED AND SEPARATE PRECIPITATION OF γ″ AND γ′ ON STRUCTURE STABILITY IN INCONEL718 AND MODIFIED ALLOYS

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