Characterization of MAR-M247 deposits fabricated through scanning laser epitaxy (SLE)

Amrita Basak, Suman Das

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

This paper aims to characterize the microhardness and the process-induced residual stress in nickel-base superalloy MAR-M247 fabricated using a laser-powder bed fusion (LPBF)-based additive manufacturing (AM) process, scanning laser epitaxy (SLE). The SLE fabricated MARM247 samples are investigated using optical microscopy, scanning electron microscopy, x-ray diffraction, and Vickers microhardness measurements. The results show that the average Vickers microhardness values do not show any significant variation with changes in SLE processing parameters. However, the microhardness values are unevenly distributed and show variations along the build direction and the laser movement direction. Overall the hardness values are within ±2σ limits for all the SLE deposited MAR-M247 samples. The effect of heat treatment on the microhardness and the residual stress is also investigated. The results show that the microhardness increases and the residual stress decreases after the heat treatment. This work is sponsored by the Office of Naval Research through grant N00014-14-1-0658.

Original languageEnglish (US)
Pages167-177
Number of pages11
StatePublished - Jan 1 2020
Event28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017 - Austin, United States
Duration: Aug 7 2017Aug 9 2017

Conference

Conference28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017
CountryUnited States
CityAustin
Period8/7/178/9/17

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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    Basak, A., & Das, S. (2020). Characterization of MAR-M247 deposits fabricated through scanning laser epitaxy (SLE). 167-177. Paper presented at 28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017, Austin, United States.