TY - CONF
T1 - Characterization of MAR-M247 deposits fabricated through scanning laser epitaxy (SLE)
AU - Basak, Amrita
AU - Das, Suman
N1 - Funding Information:
This work was sponsored by the Office of Naval Research Cyber-Enabled Manufacturing Systems program through grant N00014-11-1-0670. The authors would like to thank the School of Materials Science and Engineering, Georgia Institute of Technology for providing machine time to perform the XRD experiments, Prof. Hamid Garmestani, School of Materials Science and Engineering, Georgia Institute of Technology for his valuable insight on analyzing the XRD data, and Mr. David Tavakoli, PANalytical XRD facilities manager, Materials Characterization Facility, Georgia Institute of Technology for his assistance with performing the XRD experiments.
Funding Information:
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 ±2 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.
Publisher Copyright:
Copyright © SFF 2017.All rights reserved.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
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M3 - Paper
AN - SCOPUS:85084998095
SP - 167
EP - 177
T2 - 28th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2017
Y2 - 7 August 2017 through 9 August 2017
ER -