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Temperature Effects on the Deformation and Fracture of a Quenched-and-Partitioned Steel
Technical Paper
2013-01-0610
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Temperature effects on the deformation and fracture of a
commercially produced transformation-induced plasticity (TRIP)
steel subject to a two-step quenching and partitioning (Q&P)
heat treatment are investigated. Strain field evolution at room
temperature is quantified in this 980 MPa grade Q&P steel with
a stereo digital image correlation (DIC) technique from
quasi-static tensile tests of specimens with 0°, 45°, and 90°
orientations. Baseline tensile properties along with the variation
of the instantaneous hardening index with strain were computed.
Variations of the bake-hardening index were explored under
simulated paint bake conditions. Tensile properties were measured
at selected temperatures between -100°C and 200°C and the TRIP
effect was found to be temperature-dependent due to stress-induced
martensitic transformation at lower temperatures versus
strain-induced transformation at higher temperatures. Electron
back-scatter diffraction (EBSD) and X-ray diffraction (XRD) of
regions close to the fracture area were used to explain the
observed temperature variations of the ultimate tensile strength
(UTS), 0.2% yield strength (0.2%YS), uniform elongation (UE) and
total elongation (TE).
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Authors
Topic
Citation
Coryell, J., Savic, V., Hector, L., and Mishra, S., "Temperature Effects on the Deformation and Fracture of a Quenched-and-Partitioned Steel," SAE Technical Paper 2013-01-0610, 2013, https://doi.org/10.4271/2013-01-0610.Also In
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