Role of thermo-mechanical gyrations on the α/β interface stability in a Ti6Al4V AM alloy
Abstract
Fluctuating energy distributions experienced during Additive Manufacturing yield an evolution of spatial and temporal transients within a part. In general, the in-situ monitoring of these transients is near to impossible during manufacturing. In order to then gain perspective into the impact on these localized thermo-mechanical transients on the interface stability, rapid thermo-mechanical reversals with known boundary conditions are imposed on an AM Ti6Al4V alloy which resulted in a phase transformation leading to an increased β phase stability. Our goal with this study is to comprehend the kinetics of this phase transformation with concepts of stored energy due to plastic strain accumulation and diffusion kinetics. Atom Probe Tomography is employed to study the partitioning of the solute elements across the interface. As expected, the thermo-mechanically cycled samples showed a reduced Vanadium concentration across the β phase. Finally, this concentration profile across the interface, alongside a full-width-half-max analysis, provided insight on the potential phase transformation kinetics involved in the α → β transformation subject to thermo- mechanical gyrations.
- Authors:
-
[2];
[3];
[3];
[3];
- Univ. of Tennessee, Knoxville, TN (United States)
- The Ohio State Univ., Columbus, OH (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- 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:
- 1831682
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scripta Materialia
- Additional Journal Information:
- Journal Volume: 204; Journal ID: ISSN 1359-6462
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; thermo-mechanical reversals; α/β; solute concentrations; atom probe tomography; stored energy; thermodynamic analysis
Citation Formats
Kumar, Sabina, Vijayan, Sri Ram, Nandwana, Peeyush, Poplawsky, Jonathan D., Chen, Yan, and Babu, Sudarsanam. Role of thermo-mechanical gyrations on the α/β interface stability in a Ti6Al4V AM alloy. United States: N. p., 2021.
Web. doi:10.1016/j.scriptamat.2021.114134.
Kumar, Sabina, Vijayan, Sri Ram, Nandwana, Peeyush, Poplawsky, Jonathan D., Chen, Yan, & Babu, Sudarsanam. Role of thermo-mechanical gyrations on the α/β interface stability in a Ti6Al4V AM alloy. United States. https://doi.org/10.1016/j.scriptamat.2021.114134
Kumar, Sabina, Vijayan, Sri Ram, Nandwana, Peeyush, Poplawsky, Jonathan D., Chen, Yan, and Babu, Sudarsanam. Sun .
"Role of thermo-mechanical gyrations on the α/β interface stability in a Ti6Al4V AM alloy". United States. https://doi.org/10.1016/j.scriptamat.2021.114134. https://www.osti.gov/servlets/purl/1831682.
@article{osti_1831682,
title = {Role of thermo-mechanical gyrations on the α/β interface stability in a Ti6Al4V AM alloy},
author = {Kumar, Sabina and Vijayan, Sri Ram and Nandwana, Peeyush and Poplawsky, Jonathan D. and Chen, Yan and Babu, Sudarsanam},
abstractNote = {Fluctuating energy distributions experienced during Additive Manufacturing yield an evolution of spatial and temporal transients within a part. In general, the in-situ monitoring of these transients is near to impossible during manufacturing. In order to then gain perspective into the impact on these localized thermo-mechanical transients on the interface stability, rapid thermo-mechanical reversals with known boundary conditions are imposed on an AM Ti6Al4V alloy which resulted in a phase transformation leading to an increased β phase stability. Our goal with this study is to comprehend the kinetics of this phase transformation with concepts of stored energy due to plastic strain accumulation and diffusion kinetics. Atom Probe Tomography is employed to study the partitioning of the solute elements across the interface. As expected, the thermo-mechanically cycled samples showed a reduced Vanadium concentration across the β phase. Finally, this concentration profile across the interface, alongside a full-width-half-max analysis, provided insight on the potential phase transformation kinetics involved in the α → β transformation subject to thermo- mechanical gyrations.},
doi = {10.1016/j.scriptamat.2021.114134},
journal = {Scripta Materialia},
number = ,
volume = 204,
place = {United States},
year = {Sun Jul 18 00:00:00 EDT 2021},
month = {Sun Jul 18 00:00:00 EDT 2021}
}
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