The Effect of Remelting on the Microstructure and Mechanical Properties of a Nickel Superalloy

Zhi Wei Zhang; Yong Ji Niu; Jian Jun Tian; Ning An; Yang Gao; Chao Wang; Shi Feng Shi

doi:10.4028/www.scientific.net/MSF.849.492

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HomeMaterials Science ForumMaterials Science Forum Vol. 849The Effect of Remelting on the Microstructure and...

The Effect of Remelting on the Microstructure and Mechanical Properties of a Nickel Superalloy

Abstract:

Effect of remelting processes on the microstructure and mechanical properties of as-cast Nimonic 90 superalloy was investigated by OM (optical micrograph), SEM (scanning electron microscopy), EDS (energy-dispersive X-ray) and tensile tests. The results indicated that the microstructure of the as-cast alloy was mainly composed of γ, γ' and carbides which contain Ti and Cr elements. The average grain size of the alloy tends to increase with mould shell temperature ranging from 350°C to 950°C. The strength of the as-cast alloy decreased with the increasing of mold shell temperature, with constant elongation as the mold shell temperature changes.

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Periodical:

Materials Science Forum (Volume 849)

Pages:

492-496

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.849.492

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Online since:

March 2016

Authors:

Zhi Wei Zhang*, Yong Ji Niu, Jian Jun Tian, Ning An, Yang Gao, Chao Wang, Shi Feng Shi

Keywords:

Mechanical Properties, Nickel Superalloy, Remelting Process

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