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

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Abstract:

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)

Pages:

635-638

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.635

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Online since:

January 2005

Authors:

Nho Kwang Park, Jong Taek Yeom

Keywords:

Diffusion Bonding (DB), Hot Isostatic Pressing (HIP), MM247, Superalloy, Udimet720

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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References

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DOI: 10.2172/7127186

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