An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, New South Wales 2522 (Australia)
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800 (Australia)
- Electron Microscopy Centre, University of Wollongong, Wollongong, New South Wales 2500 (Australia)
In-situ neutron diffraction during cyclic tension-compression loading (∼+3.5% to −2.8%) of a 17Mn-3Al-2Si-1Ni-0.06C steel that exhibits concurrent transformation and twinning -induced plasticity effects indicated a significant contribution of intragranular back stresses to the observed Bauschinger effect. Rietveld analysis revealed a higher rate of martensitic transformation during tension compared to compression. Throughout cycling, α′-martensite exhibited the highest phase strains such that it bears an increasing portion of the macroscopic load as its weight fraction evolves. On the other hand, the ε-martensite strain remained compressive as it accommodated most of the internal strains caused by the shape misfit associated with the γ→ε and/or ε→α′ transformations.
- OSTI ID:
- 22398959
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
In Situ Local Measurement of Austenite Mechanical Stability and Transformation Behavior in Third-Generation Advanced High-Strength Steels
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journal | May 2018 |
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