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Title: Revealing cyclic hardening mechanism of a TRIP steel by real-time in situ neutron diffraction

Real-time in situ neutron diffraction was performed on a transformation-induced plasticity (TRIP) steel under cyclic loading at room temperature. By Rietveld refinement and single peak analysis, the volume fraction and average stress estimates as well as dislocation density of individual phases (austenite and martensite phase) were derived. The results reveal that the volume fraction of martensite phase, instead of individual phase strengthening, should be accounted for the remarkable secondary cyclic hardening.
 [1] ;  [1] ;  [1] ;  [2]
  1. ORNL
  2. Tianjin UNiversity, China
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Scripta Materialia; Journal Volume: 89
Research Org:
Oak Ridge National Laboratory (ORNL); Spallation Neutron Source
Sponsoring Org:
SC USDOE - Office of Science (SC)
Country of Publication:
United States
Neutron diffraction; Austenitic steels; Martensitic phase transformation; Low cycle fatigue; Cyclic hardening