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Age Hardenable Nickel-Based Alloy Developments and Research for New High Temperature Power Cycles Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Grain Refinement on Microstructure and Mechanical Properties of IN718 Superalloy

Authors : Taiwen Huang, Ziqi Jie, Jun Zhang, Lin Liu, Hengzhi Fu

Published in: Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications

Publisher: Springer International Publishing

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Abstract

The mixed refiner of Co3FeNb2 and CrFeNb ternary intermetallic compounds and melt superheating treatment under the modified thermally-controlled solidification (TCS) process have been designed to achieve grain refinement and further improve mechanical properties of IN718 superalloy. It is found that the refinement effect of addition grain refiners under TCS process is quite superior to that by convention casting (CC) process with refiner, as experiment results show that the grain size is refined from 3340 to 126 μm and greatly reduce the amount of porosity, during the refinement process. In addition, the applied melt treatment can refine grain size from 6420  to 89 μm and greatly reduce the amount of porosity. Meanwhile, after grain refinement, the stress rupture property under 650 °C/620 MPa is significantly improved. Grain refinement mechanisms are also discussed.

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previous chapter Effect of Homogenization Temperature on Microstructures of IN718C Alloy with Different Solidification Cooling Rates
next chapter Melt Parameters and Resulting Characteristics in Laboratory-Scale Electroslag Remelting
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Metadata
Title
Grain Refinement on Microstructure and Mechanical Properties of IN718 Superalloy
Authors
Taiwen Huang
Ziqi Jie
Jun Zhang
Lin Liu
Hengzhi Fu
Copyright Year
2018
Book
Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications

Print ISBN: 978-3-319-89479-9

Electronic ISBN: 978-3-319-89480-5

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-89480-5_16

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