Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM)
Abstract
Electron beam melting (EBM) is a metal powder bed fusion additive manufacturing (AM) technology that is used to fabricate three-dimensional near-net-shaped parts directly from computer models. Ti-6Al-4V is the most widely used and studied alloy for this technology and is the focus of this work in its ELI (Extra Low Interstitial) variation. The mechanisms of microstructure formation, evolution, and its subsequent influence on mechanical properties of the alloy in as-fabricated condition have been documented by various researchers. In the present work, the thermal history resulting in the formation of the as-fabricated microstructure was analyzed and studied by a thermal simulation. Subsequently different heat treatments were performed based on three approaches in order to study the effects of heat treatments on the singular and exclusive microstructure formed during the EBM fabrication process. In the first approach, the effect of cooling rate after the solutionizing process was studied. In the second approach, the variation of α lath thickness during annealing treatment and correlation with mechanical properties was established. In the last approach, several solutionizing and aging experiments were conducted.
- Authors:
-
- Worcester Polytechnic Inst., Worcester, MA (United States). Integrative Materials Design Center
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
- OSTI Identifier:
- 1339366
- Alternate Identifier(s):
- OSTI ID: 1412564
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Additional Journal Information:
- Journal Volume: 685; Journal Issue: C; Journal ID: ISSN 0921-5093
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Additive manufacturing; Electron beam melting; Ti-6Al-4V; Microstructure evolution; Mechanical characterization; Heat treatment
Citation Formats
Galarraga, Haize, Warren, Robert J., Lados, Diana A., Dehoff, Ryan R., Kirka, Michael M., and Nandwana, Peeyush. Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM). United States: N. p., 2017.
Web. doi:10.1016/j.msea.2017.01.019.
Galarraga, Haize, Warren, Robert J., Lados, Diana A., Dehoff, Ryan R., Kirka, Michael M., & Nandwana, Peeyush. Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM). United States. https://doi.org/10.1016/j.msea.2017.01.019
Galarraga, Haize, Warren, Robert J., Lados, Diana A., Dehoff, Ryan R., Kirka, Michael M., and Nandwana, Peeyush. Fri .
"Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM)". United States. https://doi.org/10.1016/j.msea.2017.01.019. https://www.osti.gov/servlets/purl/1339366.
@article{osti_1339366,
title = {Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM)},
author = {Galarraga, Haize and Warren, Robert J. and Lados, Diana A. and Dehoff, Ryan R. and Kirka, Michael M. and Nandwana, Peeyush},
abstractNote = {Electron beam melting (EBM) is a metal powder bed fusion additive manufacturing (AM) technology that is used to fabricate three-dimensional near-net-shaped parts directly from computer models. Ti-6Al-4V is the most widely used and studied alloy for this technology and is the focus of this work in its ELI (Extra Low Interstitial) variation. The mechanisms of microstructure formation, evolution, and its subsequent influence on mechanical properties of the alloy in as-fabricated condition have been documented by various researchers. In the present work, the thermal history resulting in the formation of the as-fabricated microstructure was analyzed and studied by a thermal simulation. Subsequently different heat treatments were performed based on three approaches in order to study the effects of heat treatments on the singular and exclusive microstructure formed during the EBM fabrication process. In the first approach, the effect of cooling rate after the solutionizing process was studied. In the second approach, the variation of α lath thickness during annealing treatment and correlation with mechanical properties was established. In the last approach, several solutionizing and aging experiments were conducted.},
doi = {10.1016/j.msea.2017.01.019},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = C,
volume = 685,
place = {United States},
year = {Fri Jan 06 00:00:00 EST 2017},
month = {Fri Jan 06 00:00:00 EST 2017}
}
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