Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4919455
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Funding
- Australian Research Council-Discovery Project [DP130101882]
- Commonwealth of Australia under the International Science Linkages program
- U.S. DOE [FWP 06SCPE401, W-7405-ENG-36, DE-AC52-06NA25396]
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In-situ neutron diffraction during cyclic tension-compression loading (similar to+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, alpha'-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 epsilon-martensite strain remained compressive as it accommodated most of the internal strains caused by the shape misfit associated with the gamma ->epsilon and/or epsilon ->alpha' transformations. (C) 2015 AIP Publishing LLC.
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