TY - JOUR
T1 - Microstructure evolution during indentation of Inconel-718 created by additive manufacturing
AU - Rifat, Mustafa
AU - DeMeter, Edward C.
AU - Basu, Saurabh
N1 - Funding Information:
This material is based upon work supported by the National Science Foundation under Grant No. 1825686 .Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/4/20
Y1 - 2020/4/20
N2 - Finishing of components originating from additive manufacturing (AM) is critically important for providing them with adequate tolerances and fatigue life. These processes often rely on surface deformation for removal of roughness features and enhancing the underlying microstructures. Optimization of finishing processes is however challenging for AM components as their mechanics of deformation is complicated by microstructure/defect/roughness combinations present in as-received surfaces. In this work, the mechanics of surface deformation in additively manufactured IN718 is studied via indentation. Effects of graded surface microstructure, surface texture and porosity defects on microstructure evolution trajectories are delineated. Using these insights, a finite element based numerical framework of surface deformation of additively manufactured IN718 is created. Utility of this framework in analysis of surface deformation of various microstructure/defect/roughness combinations is demonstrated. Implications of these insights in the optimization of finishing processes of various additively created parts is discussed.
AB - Finishing of components originating from additive manufacturing (AM) is critically important for providing them with adequate tolerances and fatigue life. These processes often rely on surface deformation for removal of roughness features and enhancing the underlying microstructures. Optimization of finishing processes is however challenging for AM components as their mechanics of deformation is complicated by microstructure/defect/roughness combinations present in as-received surfaces. In this work, the mechanics of surface deformation in additively manufactured IN718 is studied via indentation. Effects of graded surface microstructure, surface texture and porosity defects on microstructure evolution trajectories are delineated. Using these insights, a finite element based numerical framework of surface deformation of additively manufactured IN718 is created. Utility of this framework in analysis of surface deformation of various microstructure/defect/roughness combinations is demonstrated. Implications of these insights in the optimization of finishing processes of various additively created parts is discussed.
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U2 - 10.1016/j.msea.2020.139204
DO - 10.1016/j.msea.2020.139204
M3 - Article
AN - SCOPUS:85081115401
SN - 0921-5093
VL - 781
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
M1 - 139204
ER -