Constitutive and transformation kinetics modeling of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:mrow><mml:mi>ε</mml:mi></mml:mrow></mml:math>-, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msup><mml:mi>α</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math>-Martensite and mechanical twinning in steels containing austenite

Aristeidakis, John S.; Haidemenopoulos, Gregory N.

doi:10.1016/j.actamat.2022.117757

Cited by 18 publications

(3 citation statements)

References 50 publications

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“…Figure 11 shows the true stress–strain and strain hardening rate (SHR) curves of HV and LV steels annealed at 600 °C, 700 °C and 725 °C for 30 min, respectively. As is well-known, strains are mainly modified by dislocation slip in the early stages of deformation, whereas later stresses are mainly released through the combined effect of precipitates, dislocations and the TRIP effect which, together, determine the plasticity of the material [ 32 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Vanadium Microalloying and Intercritical Annealing on Yield Strength–Ductility Trade-Offs of Medium-Manganese Steels

Tang²,

Shi

et al. 2023

Materials

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In this paper, we investigate the effects of vanadium on the strength and ductility of medium-manganese steels by analyzing the microstructural evolution and strain hardening rates and performing quantitative calculations. Two significantly different contents of vanadium, 0.05 and 0.5 wt.%, were independently added to model steel (0.12C-10Mn) and annealed at different intercritical temperatures. The results show that higher vanadium addition increases the yield strength but decreases the ductility. The maximum yield strength can increase from 849 MPa to 1063 MPa at low temperatures. The model calculations reveal that this is due to a precipitation strengthening increment of up to 148 MPa and a dislocation strengthening increment of 50 MPa caused by a higher quantity of V4C3 precipitates. However, the high density of vanadium carbides leads them to easily segregate at grain boundaries or phase interfaces, which prevents strain from uniformly distributing throughout the phases. This results in stress concentrations which cause a high strain hardening rate in the early stages of loading and a delayed transformation-induced plasticity (TRIP) effect. Additionally, the precipitates decrease the austenite proportion and its carbon concentrations, rendering the TRIP effect unsustainable. Accordingly, the ductility of high vanadium steels is relatively low.

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Section: Discussionmentioning

confidence: 99%

Effects of Vanadium Microalloying and Intercritical Annealing on Yield Strength–Ductility Trade-Offs of Medium-Manganese Steels

Tang²,

Shi

et al. 2023

Materials

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Section: Formation Of Shear Bandsmentioning

confidence: 99%

“…A schematic representation of the sequence of the events taking place during the formation of shear bands in ASSs during deformation is reproduced in Figure 3(a) to (f). 63,67 The sequence of formation can be explained in the following steps: When undergoing deformation, the dissociation of a perfect dislocation results in the formation of a wide stacking fault as described in Figures 2 and 3(a). These stacking faults could form on (a) interaction of active slip planes of different families, (b) grain boundaries and annealing twin boundaries (c) interfaces of different phase crystals and inclusions.…”

Section: Mechanism Of Deformation-induced Transformation Of Austenite...mentioning

confidence: 99%

A critical review on deformation-induced transformation kinetics of austenitic stainless steels

Jain,

Varshney

2024

Materials Science and Technology

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Deformation-induced austenite to martensite transformation is an important phenomenon during the deformation of metastable fully austenitic transformation induced plasticity (TRIP) steels. The kinetics of austenite to martensite transformation influence the deformation behaviour of austenitic stainless steels but is often neglected by the materials community. In this paper, after an initial discussion on thermodynamics and mechanism, the importance of deformation-induced transformation kinetics is briefly outlined and the influence of various parameters like grain size, deformation temperature, strain rate, stress state and prior austenite deformation on the transformation kinetics is critically assessed. Variation of transformation kinetics with various parameters has been identified and justified. These variations could act as a ready reference for designing austenitic stainless steels with the desired set of mechanical properties and deformation behaviour. Further in this paper, selected models that can predict the transformation kinetics are reviewed and compared. In the end, research fronts related to transformation kinetics that can be further explored have been identified.

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基于模拟-建模研究化学与温度对难熔高熵合金力学行为和变形机制的影响

Li,

Ren,

Liu

et al. 2023

Acta Mech. Sin.

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Constitutive and transformation kinetics modeling of ε-, α′-Martensite and mechanical twinning in steels containing austenite

Cited by 18 publications

References 50 publications

Effects of Vanadium Microalloying and Intercritical Annealing on Yield Strength–Ductility Trade-Offs of Medium-Manganese Steels

Effects of Vanadium Microalloying and Intercritical Annealing on Yield Strength–Ductility Trade-Offs of Medium-Manganese Steels

A critical review on deformation-induced transformation kinetics of austenitic stainless steels

基于模拟-建模研究化学与温度对难熔高熵合金力学行为和变形机制的影响

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