Role of Rhenium in Single Crystal Ni-Based Superalloys

Abstract:

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The effect of rhenium on the microstructure and mechanical properties of single crystal superalloys with a nominal composition of Ni-3Cr-12Co-1Mo-6W-6Al-8Ta-0.1Hf-(0, 2, 4) Re has been studied. With the rise of rhenium content, the size of as-cast  particles becomes smaller. Rhenium addition elevates the incipient melting temperature and slows down the solid solution process. Even after 2000h prolonged aging both at 950°C and 1050°C, no topologically close-packed phase precipitation is found in the three alloys with Re content up to 4%. Re retards the  coarsening and is beneficial to improving the stress rupture life. The deformation mechanisms together with the dislocation configuration have been studied and discussed.

Info:

Periodical:

Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

2257-2262

DOI:

10.4028/www.scientific.net/MSF.638-642.2257

Citation:

T. Jin et al., "Role of Rhenium in Single Crystal Ni-Based Superalloys", Materials Science Forum, Vols. 638-642, pp. 2257-2262, 2010

Online since:

January 2010

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Price:

$35.00

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