Alloys-by-design: Application to new superalloys for additive manufacturing

Yuanbo T. Tang, Chinnapat Panwisawas, Joseph N. Ghoussoub, Yilun Gong, John W.G. Clark, Andre A.N. Nemeth, D. Graham McCartney, Roger C. Reed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

New grades of γ/γ′ nickel-based superalloy for the additive manufacturing process are designed using computational approaches. Account is taken of the need to avoid defect formation via solidification and solid-state cracking. Processing trials are carried out using powder-based selective laser melting, comparing with the heritage alloys IN939 and CM247LC. Microstructural characterisation, calorimetry and hot tensile testing are used to assess the approach employed. The superior processability and mechanical behaviour of the new alloys are demonstrated. Suggestions are made for refinements to the modelling approach.
Original languageEnglish
Pages (from-to)417-436
Number of pages20
JournalActa Materialia
Volume202
Early online date11 Sept 2020
DOIs
Publication statusPublished - 1 Jan 2021

Bibliographical note

Acknowledgments:
The authors acknowledge funding from Innovate UK, formerly the Technology Strategy Board (TSB), under project number 104047, and specifically the Materials and Manufacturing Division. They appreciate inspiring discussions with Dr. Ravi Aswathanarayanaswamy of Renishaw plc. Helpful comments from Dr. Jitendra Patel and Dr. Robin Wilson of Innovate UK are acknowledged. C.P. would like to acknowledge the funding from Innovation Fellowship funded by Engineering and Physical Science Research Council (EPSRC), UK Research and Innovation, under the grant number: EP/S000828/1.

Keywords

  • Alloys-By-Design
  • Additive Manufacturing
  • Selective laser melting
  • Nickel-based superalloys
  • Cracking mechanisms
  • Micromechanics

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