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Title: Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5

Abstract

High gamma prime (γ') nickel-based alloys produced by selective electron beam melting are of interest to the turbine industry which requires control of microstructure in relation to loading conditions within complex component geometry. Welding literature predicts cracking and microstructure evolution as a function of alloy composition and process parameters in this class of alloys. In addition, Additive manufacturing causes variations in the above conditions due to the interaction of geometry on processing and heat transfer. The influence of geometry on processing conditions was explored for alloy Rene N5 by characterizing the solidification grain microstructure and solid-state precipitation. A Semi-Analytical Heat Transfer Model was employed to explain the resulting variation in solidification grain morphology that occurred due to the part geometry. Finally, the as-built precipitation structure was found to vary as a function of build height and had no correlation to the solidification grain structure or the layer geometry.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [3];  [1];  [4]; ORCiD logo [5];  [6]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Material Science and Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace and Biomedical Engineering
  4. Air Force Research Lab. (AFRL), Wright-Patterson AFB, OH (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Material Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace and Biomedical Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1471895
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
[ Journal Volume: 49; Journal Issue: 10]; Journal ID: ISSN 1073-5623
Publisher:
ASM International
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Frederick, Curtis, Plotkowski, Alex J., Kirka, Michael M., Haines, Michael P., Staub, Austin X., Schwalbach, Edwin, Cullen, David A., and Babu, Sudarsanam Suresh. Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5. United States: N. p., 2018. Web. doi:10.1007/s11661-018-4793-y.
Frederick, Curtis, Plotkowski, Alex J., Kirka, Michael M., Haines, Michael P., Staub, Austin X., Schwalbach, Edwin, Cullen, David A., & Babu, Sudarsanam Suresh. Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5. United States. doi:10.1007/s11661-018-4793-y.
Frederick, Curtis, Plotkowski, Alex J., Kirka, Michael M., Haines, Michael P., Staub, Austin X., Schwalbach, Edwin, Cullen, David A., and Babu, Sudarsanam Suresh. Wed . "Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5". United States. doi:10.1007/s11661-018-4793-y. https://www.osti.gov/servlets/purl/1471895.
@article{osti_1471895,
title = {Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5},
author = {Frederick, Curtis and Plotkowski, Alex J. and Kirka, Michael M. and Haines, Michael P. and Staub, Austin X. and Schwalbach, Edwin and Cullen, David A. and Babu, Sudarsanam Suresh},
abstractNote = {High gamma prime (γ') nickel-based alloys produced by selective electron beam melting are of interest to the turbine industry which requires control of microstructure in relation to loading conditions within complex component geometry. Welding literature predicts cracking and microstructure evolution as a function of alloy composition and process parameters in this class of alloys. In addition, Additive manufacturing causes variations in the above conditions due to the interaction of geometry on processing and heat transfer. The influence of geometry on processing conditions was explored for alloy Rene N5 by characterizing the solidification grain microstructure and solid-state precipitation. A Semi-Analytical Heat Transfer Model was employed to explain the resulting variation in solidification grain morphology that occurred due to the part geometry. Finally, the as-built precipitation structure was found to vary as a function of build height and had no correlation to the solidification grain structure or the layer geometry.},
doi = {10.1007/s11661-018-4793-y},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = [10],
volume = [49],
place = {United States},
year = {2018},
month = {8}
}

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