Tensile Properties of HIP/DB'ed Ni-Base Superalloys

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Hot isostatic pressing(HIP)/diffusion bonding(DB) was employed for cast superalloy MM247 and P/M superalloy Udimet720. The effects of P/M Udimet720 particle size, holding time for HIP/DB and post heat-treatment on the microstructure and tensile properties were investigated. Tensile properties of HIP/DB’ed MM247/Udimet720 were improved at room temperature and 650°C with decreasing powder size from –140mesh to –270mesh, and with increasing HIP/DB time from 2h to 3h. Post-HIP heat-treatments, which strengthen the soft MM247 with cuboidal ’ precipitation, are proposed to enhance the mechanical properties of the HIP/DB’ed MM247/Udimet720.

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Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

635-638

Citation:

N. K. Park and J. T. Yeom, "Tensile Properties of HIP/DB'ed Ni-Base Superalloys", Materials Science Forum, Vols. 475-479, pp. 635-638, 2005

Online since:

January 2005

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$38.00

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[4] J.R. Kattus, Aerospace Structural Metals Handbook (Purdue Res. Found., USA 1999). 4㎛㎛㎛㎛ (a) Udimet720/A-HT (b) MM247/A-HT (c) Udimet720/B-HT (d) MM247/B-HT Figure 6. Microstructures of heat-treated MM247/ Udimet720. A-HT: 1105℃/4h+650℃/24h+760℃/16h, B-HT: 870℃/20h (a) (b) (c) (d).

DOI: https://doi.org/10.2172/7127186