Theoretical Assessment on the Phase Transformation Kinetic Pathways of Multi-component Ti Alloys: Application to Ti-6Al-4V
- Pennsylvania State Univ., University Park, PA (United States). Dept. of Material Sciences and Engineering
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division
- CompuTherm LLC, Madison, WI (United States)
Here we present our theoretical assessment of the kinetic pathways during phase transformations of multi-component Ti alloys. Employing the graphical thermodynamic approach and an integrated free energy function based on the realistic thermodynamic database and assuming that a displacive structural transformation occurs much faster than long-range diffusional processes, we analyze the phase stabilities of Ti-6Al-4V (Ti-6wt.%Al-4wt.%V). Our systematic analyses predict a variety of possible kinetic pathways for β to (α + β) transformations leading to different types of microstructures under various heat treatment conditions. In addition, the possibility of unconventional kinetic pathways is discussed. Lastly, we also briefly discuss the application of our approach to general multicomponent/multiphase alloy systems.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344; FA8650-12-2-7230
- OSTI ID:
- 1262190
- Report Number(s):
- LLNL-JRNL-673240
- Journal Information:
- Journal of Phase Equilibria and Diffusion, Vol. 37, Issue 1; ISSN 1547-7037
- Publisher:
- ASM InternationalCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Selective Laser Melting Produced Ti-6Al-4V: Post-Process Heat Treatments to Achieve Superior Tensile Properties
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journal | January 2018 |
The Heat Treatment Influence on the Microstructure and Hardness of TC4 Titanium Alloy Manufactured via Selective Laser Melting
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journal | July 2018 |
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