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The Effect of Processing Variables on Powder Interlayer Bonding in Nickel-Based Superalloys
Olivia Stanners1, Sean John1, Helen M Davies1
1Institute of Structural Materials, Bay Campus, Swansea University, Swansea SA1 8EN, UK.
Materials (Basel, Switzerland)
|February 5, 2020
Summary
Powder Interlayer Bonding (PIB) offers a low-energy solution for joining nickel-based superalloys. This solid-state method successfully bonded superalloys with minimal porosity, outperforming conventional joining techniques.
Area of Science:
- Materials Science
- Metallurgy
- Solid-State Joining
Background:
- Nickel-based superalloys require high energy for joining due to elevated operating temperatures.
- Conventional joining methods like friction welding are energy-intensive.
- Powder Interlayer Bonding (PIB) offers a potentially lower-energy alternative.
Purpose of the Study:
- To investigate the efficacy of Powder Interlayer Bonding (PIB) for joining nickel-based superalloys.
- To evaluate PIB as a viable alternative to conventional joining methods for these alloys.
Main Methods:
- Powder Interlayer Bonding (PIB) process utilizing a localized temperature gradient induced by induction current.
- Solid-state joining by compressing and heating a powder interlayer between faying surfaces.
- Microstructural analysis of bondlines to assess porosity levels.
Main Results:
- Successful joining of nickel-based superalloys was achieved using PIB.
- Observed bondlines exhibited very low porosity.
- The bonded areas demonstrated lower porosity compared to the base superalloy material.
Conclusions:
- Powder Interlayer Bonding (PIB) is a feasible and effective method for joining nickel-based superalloys.
- PIB presents a promising low-energy joining technology for challenging superalloys.
- The process results in high-quality bonds with reduced defects.
