Deformation-Induced Transformation of Retained Austenite in Transformation Induced Plasticity-Aided Steels: A Thermodynamic Model

Mukherjee, Madhumita; Singh, Shiv Brat; Mohanty, O. N.

doi:10.1007/s11661-008-9599-x

Cited by 24 publications

(12 citation statements)

References 27 publications

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“…A V γ vs. strain graph is typically used to illustrate the DIT behavior in steel because it is suitable for comparing macroscopic work hardening behaviors 5,7,29,[31][32][33]38,39,43,44) and considering transformation behaviors using the strain-dominant strain-induced transformation (SIT) model 5,7,31,32,[38][39][40][41][42][43][44] shown in Fig. 1(a).…”

Section: Transformation During Tensile Deformationmentioning

confidence: 99%

Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets

et al. 2021

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Transformation-induced plasticity (TRIP) is a phenomenon that improves the deformability of highstrength steel. TRIP depends on deformation-induced martensite transformation behavior. To clarify the mechanism of the transformation in low-alloy TRIP steel, we evaluated the transformation behavior via in-plane tension and compression experiments. During tensile and compressive deformation, the volume fraction of austenite (V γ ) decreased as strain and stress increased. The rate at which V γ decreased during compressive deformation was slower than that during tensile deformation. However, after continuous deformation (i.e., tensile deformation under compression and vice versa), V γ depended on stress, not strain. The transformation behavior was controlled by the applied stress, regardless of strain path and stored strain. It is appropriate to apply a stress-dominant strain-induced transformation model to explain this macroscopic transformation behavior.

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Section: Transformation During Tensile Deformationmentioning

confidence: 99%

Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets

et al. 2021

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“…The thermodynamic effect via DG MECH is usually not accounted for, or is incorporated using a non-linear nucleation function in order to estimate the rate of transformation. [3][4][5] The problem is that, in most experiments, strain induced transformation is studied by applying a sufficiently large stress to the austenite as it transforms. The influence of stress (through DG MECH ) and strain (via defects) cannot then be isolated.…”

Section: Introductionmentioning

confidence: 99%

Analysis of deformation induced martensitic transformation in stainless steels

Das

Chakraborti

Tarafder

et al. 2011

Materials Science and Technology

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Many studies monitoring the formation of martensite during the tensile deformation of austenite report data which are, in principle, affected by both the applied stress and the resulting plastic strain. It is not clear in these circumstances whether the transformation is stress induced (i.e. the stress provides a mechanical driving force) or whether the generation of defects during deformation helps nucleate martensite in a scenario better described as strain induced transformation. The authors demonstrate in the present work that a large amount of published data relating the fraction of martensite to plastic strain can in fact be described in terms of the pure thermodynamic effect of applied stress.

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“…Mukherjee proposed a thermodynamic model to predict deformation‐induced transformation:

f_{γ ϵ} = f_{γ 0} true[\frac{Δ G^{γ \to α^{'}} + A^{'}}{Δ G^{γ \to α^{'}} + A^{'} - k_{1} ϵ^{q}} true]

where A ′ is the elastic strain energy per unit volume of martensite due to shape change and k 1 ϵ q represents the mechanical driving force provided by the externally applied load, where k 1 and q are a constant and strain exponent, respectively …”

Section: Deformation Mechanism and Austenite Stabilitymentioning

confidence: 99%

The Role of Transformation‐Induced Plasticity in the Development of Advanced High Strength Steels

2018

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Lightweight structural components made of advanced high-strength steels (AHSSs) in the automotive industry can substantially reduce greenhouse gas emissions. The 3rd-generation AHSSs, which consist of medium Mn steel, quenching and partitioning (Q&P) steel, and carbide-free bainitic (CFB) steel, is the current research focus of the steel community. In particular, the retained austenite grains are the intrinsic components of the 3rd-generation AHSSs. These retained austenite grains can demonstrate a transformationinduced plasticity (TRIP) effect by transforming into martensite during mechanical loading, improving the strain-hardening behavior of AHSSs. Consequently, intensive research has been carried out over the past 30 years to understand the role of the TRIP effect on the development of AHSSs. Therefore, this review article is aimed to provide a state-of-the-art summary of recent progress on AHSSs with the TRIP effect. Specifically, the processing, the relationship between microstructure and mechanical properties, and the potential industrial applications of TRIP-enabled AHSSs will be addressed in this review. More importantly, the mechanical stability of the retained austenite grains, which determines the overall performance of the TRIP effect in AHSSs, will be discussed by considering several governing factors.

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Deformation-Induced Transformation of Retained Austenite in Transformation Induced Plasticity-Aided Steels: A Thermodynamic Model

Cited by 24 publications

References 27 publications

Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets

Deformation-induced Martensite Transformation Behavior during Tensile and Compressive Deformation in Low-alloy TRIP Steel Sheets

Analysis of deformation induced martensitic transformation in stainless steels

The Role of Transformation‐Induced Plasticity in the Development of Advanced High Strength Steels

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