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Title: An in-situ neutron diffraction study of a multi-phase transformation and twinning-induced plasticity steel during cyclic loading

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.
Authors:
 [1] ; ; ;  [2] ;  [1] ;  [3] ;  [4] ;  [5]
  1. School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, New South Wales 2522 (Australia)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  3. (Australia)
  4. Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800 (Australia)
  5. Electron Microscopy Centre, University of Wollongong, Wollongong, New South Wales 2500 (Australia)
Publication Date:
OSTI Identifier:
22398959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM ALLOYS; COMPARATIVE EVALUATIONS; COMPRESSION; LOADING; MANGANESE ALLOYS; MARTENSITE; NEUTRON DIFFRACTION; NICKEL ALLOYS; PHASE TRANSFORMATIONS; PLASTICITY; STEELS; STRAINS; STRESSES; TWINNING