Optimizing Transformation-Induced Plasticity to Resist Microvoid Softening
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11661_2024_Article_7608.pdf
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1.12 MB
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Checksum (MD5)
04e8a0cba14d7e03ade6021347ef274a
Author(s)
Snow, Brandon D.
Olson, G. B.
Parks, D. M.
Date Issued
October 18, 2024
Journal
Metallurgical and Materials Transactions A
Publisher
Springer US
Citation
Snow, B.D., Olson, G.B. & Parks, D.M. Optimizing Transformation-Induced Plasticity to Resist Microvoid Softening. Metall Mater Trans A (2024).
Version
Final published version
Abstract
Many high-performance steels that are critical for energy-efficient, lightweight designs rely on transformation-induced plasticity (TRIP) to achieve superior combinations of strength and ductility/toughness. Further development of these alloys will require greater optimization of the metastable (retained) austenite phase responsible for TRIP. Considering the complex nature of TRIP and its effects on ductile fracture, an integrated computational materials engineering (ICME) approach to materials optimization is desired. In this work, we report the results of a large series of micromechanical finite element calculations that probe the interaction of TRIP and void-mediated ductile fracture mechanisms. The simulations identify the optimal austenite stability for maximizing the benefit of TRIP across a wide range of stress states. The applied stress triaxiality significantly influences the microvoid growth rate and the computationally determined optimal stability. The simulation results are compared with existing experimental data, demonstrating good agreement.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/s11661-024-07608-0
