Microscale-calibrated modeling of the deformation response of low-carbon martensite

Ghassemi-Armaki, Hassan; Chen, Peng; Bhat, Shrikant; Sadagopan, Sriram; Kumar, Satish; Bower, Allan F.

doi:10.1016/j.actamat.2013.02.051

Cited by 78 publications

(45 citation statements)

References 51 publications

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“…Bhadeshia [28] pointed out that in TRIP steels it is unlikely that the large tensile elongation is predominantly caused by the transformation from austenite into martensite alone. The martensite colonies act as strong inclusions, akin to reinforcing components in a composite, and should have also played a role in strain hardening [29,30]. A similar conclusion has been reached for TWIP steels where the twinning strain itself makes a significant though small contribution to the total elongation [31].…”

Section: Introductionsupporting

confidence: 56%

Strain hardening in Fe–16Mn–10Al–0.86C–5Ni high specific strength steel

et al. 2016

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Keywords:High specific strength steel Dual-phase nanostructure Strain hardening Ductility In situ high-energy X-ray diffraction a b s t r a c tWe report a detailed study of the strain hardening behavior of a Fee16Mne10Ale0.86Ce5Ni (weight percent) high specific strength (i.e. yield strength-to-mass density ratio) steel (HSSS) during uniaxial tensile deformation. The dual-phase (g-austenite and B2 intermetallic compound) HSSS possesses high yield strength of 1.2e1.4 GPa and uniform elongation of 18e34%. The tensile deformation of the HSSS exhibits an initial yield-peak, followed by a transient characterized by an up-turn of the strain hardening rate. Using synchrotron based high-energy in situ X-ray diffraction, the evolution of lattice strains in both the g and B2 phases was monitored, which has disclosed an explicit elasto-plastic transition through load transfer and strain partitioning between the two phases followed by co-deformation. The unloadingreloading tests revealed the Bauschinger effect: during unloading yield in g occurs even when the applied load is still in tension. The extraordinary strain hardening rate can be attributed to the high back stresses that arise from the strain incompatibility caused by the microstructural heterogeneity in the HSSS.

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Section: Introductionsupporting

confidence: 56%

Strain hardening in Fe–16Mn–10Al–0.86C–5Ni high specific strength steel

et al. 2016

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“…This was confirmed by micro-bending tests differentiating low-angle slip transmission and high-angle dislocation pile-up behavior by slip trace analysis [25]. Also, Ghassemi-Armaki et al found an increase in local strain hardening due to the presence of block boundaries in micro-pillar compression tests [26]. Sub-block boundaries also contribute to boundary strengthening [27].…”

Section: Introductionmentioning

confidence: 83%

Multiple mechanisms of lath martensite plasticity

et al. 2016

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“…Therefore, only the presence of interlath retained austenite seems to explain both the apparent slip traces occurring along lath habit planes and the observed orientation dependent behaviour of lath martensite (e.g. Mine et al, 2013;Ghassemi-Armaki et al, 2013). Moreover, interlath retained austenite may well contribute to the observed ductile fracture behaviour, e.g.…”

Section: Discussionmentioning

confidence: 99%