Influence of strain rate and strain at temperature on TRIP effect in a metastable austenitic stainless steel

Kumar, J. V. Tilak; Sudha, J.; Padmanabhan, K. A.; Frolova, Anna; Stolyarov, V. V.

doi:10.1016/j.msea.2020.139046

Cited by 24 publications

(4 citation statements)

References 52 publications

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“…The influence of higher strain rates is analysed since the real vehicle impacts are very often at higher speeds and the corresponding high strain rates. For this reason, the mechanical properties of the flange matrix can be different from the nominal ones or those measured at lower strain rates [ 17 , 21 , 22 ]. Figure 2 illustrates the engineering stress–strain curves for the different strain rates.…”

Section: Results Of Experiments and Their Discussionmentioning

confidence: 99%

Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier

et al. 2023

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This study investigates the influence of strain rate on plastic deformation developed in the flange of a steel road barrier. This effect can be investigated by the use of the uniaxial tensile test. It was found that the strain rate increases yield as well as ultimate strength and gently drops down the elongation at break. Moreover, the accelerated strain rate is connected with matrix heating and increasing the Taylor–Quinney coefficient. Despite the valuable matrix heating and the higher Taylor–Quinney coefficient at the higher strain rates, samples necking is initiated earlier and dislocation density is higher. Flange grains become preferentially aligned along the direction of uniaxial stress, especially at the higher plastic strains. Finally, surface Zn protective layer delamination is initiated quite early beyond the yielding. It is considered that the cracks are due to the different response of the Zn allayer and underlying steel matrix on the plastic straining. Increasing strain rate attenuates the degree of Zn layer delamination.

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Section: Results Of Experiments and Their Discussionmentioning

confidence: 99%

Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier

et al. 2023

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“…Moreover, the transformation-induced plasticity (TRIP) phenomenon appears in the normal range of crack preface. In addition, due to the existence of RA, the interface of pure body-centered cubic structure is replaced by body-centered cubic and face-centered cubic high lattice planes, which is not conducive to crack propagation [19][20][21]. However, the above theory only applies when the RA is distributed in the cracks of martensite lath.…”

Section: Scanningmentioning

confidence: 99%

Characterization of Retained Austenite in Advanced High-Strength Steel

Zhang

et al. 2023

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The retained austenite (RA) in advanced high-strength steels directly affects their plasticity. It is very important for the accurate characterization of their content and types. This paper prepared three specimens with three different Mn contents (1.0%, 1.4%, and 1.7%) that are used to obtain high-strength steel by ultrafast cooling heat treatment. The volume content and distribution of the RA were analysed by an X-ray Debye ring measurement system, electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). In addition, the mechanical tensile test provided the tensile properties and elongation of three specimens. It was finally concluded that when the content of Mn increased, the island-type and thin film-type RA both increased, which may effectively improve the plasticity of the martensitic steels.

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“…Susceptibility of austenite to undergo deformationinduced transformation into martensite primarily depends on the stability of austenite towards the transformation. [16][17][18][19] The rate of austenite to martensite transformation also influences the overall deformation behaviour and mechanical properties of metastable austenitic stainless steels. 20,21 A high transformation rate of austenite into martensite results in quick saturation of martensite content in steel and completion of the deformation-induced transformation at small strains.…”

Section: Introductionmentioning

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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Influence of strain rate and strain at temperature on TRIP effect in a metastable austenitic stainless steel

Cited by 24 publications

References 52 publications

Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier

Influence of Strain Rate on Plastic Deformation of the Flange in Steel Road Barrier

Characterization of Retained Austenite in Advanced High-Strength Steel

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

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