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Open AccessArticle

The Effect of Processing Variables on Powder Interlayer Bonding in Nickel-Based Superalloys

1
Institute of Structural Materials, Bay Campus, Swansea University, Swansea SA1 8EN, UK
2
Rolls-Royce plc, P.O. Box 31, Derby DE24 8BJ, UK
*
Author to whom correspondence should be addressed.
Materials 2020, 13(3), 601; https://doi.org/10.3390/ma13030601
Received: 28 November 2019 / Revised: 21 January 2020 / Accepted: 25 January 2020 / Published: 29 January 2020
(This article belongs to the Special Issue Advances in Structural Metallic Systems for Gas Turbines)
Powder Interlayer Bonding (PIB) has been considered as a lower-energy joining technology for nickel-based superalloys compared to conventional methods; such as friction welding. Typically; nickel-based superalloys exhibit high energy requirements for joining due to their high operating temperatures. However; PIB utilizes a localized temperature gradient created by an induction current; reducing the energy requirements for the process. PIB is a solid-state joining method that compresses and heats a powder interlayer between two faying surfaces to produce one joined workpiece. It has been successfully used to bond titanium alloys; and the objectives of this work were to explore its application as a joining method for nickel-based superalloys. Initial results showed that joining nickel-based superalloys via PIB is possible; and bondlines with very little porosity were observed. Further analysis showed that these bonded areas had lower porosity than the base material; suggesting PIB could be a successful joining method for difficult-to-join nickel-based superalloys. View Full-Text
Keywords: powder; interlayer; bonding; joining; nickel-based superalloys powder; interlayer; bonding; joining; nickel-based superalloys
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MDPI and ACS Style

Stanners, O.; John, S.; Davies, H.M.; Watkins, I.; Marchisio, S. The Effect of Processing Variables on Powder Interlayer Bonding in Nickel-Based Superalloys. Materials 2020, 13, 601.

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