Plastic accomodation during growth of the martensic plates in Fe-Ni alloys

Datta, R.; Ghosh, Gautam; Raghavan, V.

doi:10.1016/0036-9748(86)90254-1

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…In contrast, the growth of the lath martensite stops inside the grain and is not related to such obstacles. It was suggested in [144,372] that plastic accommodation of the transformation strain (see also [79,127]) causes arrest of the lengthening and plate to lath morphological transition in steels, which is important for optimization of steels mechanical properties and steel design. This was done, however, utilizing relatively simple model.…”

Section: Macroscale Nucleation Of a Martensitic Platementioning

confidence: 99%

Phase transformations, fracture, and other structural changes in inelastic materials

Levitas

2021

International Journal of Plasticity

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Section: Macroscale Nucleation Of a Martensitic Platementioning

confidence: 99%

Phase transformations, fracture, and other structural changes in inelastic materials

Levitas

2021

International Journal of Plasticity

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“…Additionally, strengthening of the austenite, as promoted by plastic accommodation of the transformation strain in the austenite during martensite formation, 28,29,[36][37][38] contributes to the strain energy term suppressing the transformation process. 39,40 However, martensite formation does not completely stop, because growth of pre-existing nuclei can still occur to a limited extend.…”

Section: Multiple Transformation Rate Maximamentioning

confidence: 99%

“…stress assisted, 22 and growth 35 ). Plastic deformation by dislocation production in austenite stabilises austenite against movement of an existing martensite/austenite interface into austenite, 29,36,37 often referred to as mechanical stabilisation of austenite. 38 Conversely, dislocations in austenite have been considered as martensite nucleation sites and hence can promote martensite formation.…”

Section: Introductionmentioning

confidence: 99%

Thermally activated growth of lath martensite in Fe–Cr–Ni–Al stainless steel

Villa¹,

Hansen²,

Pantleon³

et al. 2015

Materials Science and Technology

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The austenite-to-martensite transformation in a partially hardened stainless steel containing 17wt %Cr, 7wt %Ni and 1wt % Al was investigated with Vibrating Sample Magnetometry and Electron Back-Scatter Diffraction. Magnetometry demonstrated that measurable martensite formation can be suppressed on fast cooling to 77K as well as on subsequent fast heating to 373 K. Surprisingly, martensite formation was observed during moderate heating from 77 K, instead. Electron Back-Scatter Diffraction demonstrated that the morphology of martensite is lath type. The kinetics of the transformation is interpreted in terms of athermal nucleation of lath martensite followed by thermally activated growth. It is anticipated that substantial autocatalytic martensite formation occurs during thermally activated growth. The observation of several retardations and accelerations of the transformation rate during slow isochronal cooling is interpreted in terms of the contribution of self-induced mechanical stabilization of austenite during martensite formation.

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“…Firstly, the contribution of strain energy may arise from the generation of a compressive state of stress in austenite during the transformation process [41,43,44], which thermodynamically stabilizes austenite against its transformation into martensite [45][46][47]. Secondly, the contribution of strain energy may result from strengthening of the parent austenite phase during martensite formation [38,48,49], which inhibits growth of the martensite lath [48,50]. Strengthening of the austenite during martensite formation was suggested as the athermal mechanism controlling the overall kinetics of martensitic transformations in steel [38,48].…”

Section: Introductionmentioning

confidence: 99%