On the thermodynamic stability of retained austenite in 4340 steel

Haidemenopoulos, Gregory N.; Vasilakos, Apostolos N.

doi:10.1016/s0925-8388(96)02574-1

Cited by 25 publications

(32 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[77][78][79][80][81][82] While M d temperature is only chemical composition dependent, the M s temperature is affected by both the size of the retained austenite [83][84][85] and the applied stress. [86][87][88] It is known that the smaller the PAG size, the lower the transformation temperature. [83][84][85] A qualitative explanation for such behavior argues that as the austenite grain size is reduced, there is a Hall-Petch strengthening, thereby making it difficult for martensite to form.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Tensile Response of Two Nanoscale Bainite Composite-Like Structures

Morales-Rivas

Yen

Huang

et al. 2015

JOM

View full text Add to dashboard Cite

The present work is concerned with the study of the relationship between microstructure and ductility of nanostructured bainite. The tensile behavior of two steels treated at the same temperature during different times has been analyzed. Special attention has been paid to the role that the retained austenite mechanical stability plays in enhancing the ductility through its contribution to the work-hardening and the damage resistance of these materials. The results have shown that the relative mechanical properties of the phases present affect both the martensitic transformation behavior and the total elongation.

show abstract

Section: Microstructural Evolutionmentioning

confidence: 99%

“…16,[86][87][88]90,91 The results thus obtained, following the methodology described in Refs. 88 and 91 are presented in Fig.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

Tensile Response of Two Nanoscale Bainite Composite-Like Structures

Morales-Rivas

Yen

Huang

et al. 2015

JOM

View full text Add to dashboard Cite

show abstract

“…It must be added that careful calorimetry measurements are a boon for obtaining vital thermodynamic and kinetic data on martensitic transformation. These data are of immense value in thermodynamic modelling of martensitic phase transformations in general [97][98][99][100][101][102][103][104][105][106][107][108][109]. It is amidst this backdrop, the theme of the present study has been framed.…”

Section: General Remarksmentioning

confidence: 99%

A study on martensitic phase transformation in 9Cr–1W–0.23V–0.063Ta–0.56Mn–0.09C–0.02N (wt.%) reduced activation steel using differential scanning calorimetry

Raju

Ganesh

Kumar

et al. 2010

Journal of Nuclear Materials

View full text Add to dashboard Cite

“…Haidemenopoulos [48,67,68] has proposed a thermodynamically based model to predict the Ms temperature of the retained austenite in low-alloy TRIP steels. This model takes into account the yield strength, stress state, composition, and size of the retained-austenite particles.…”

Section: A Compositional Effectsmentioning

confidence: 99%

Influence of alloying elements on the kinetics of strain-induced martensitic nucleation in low-alloy, multiphase high-strength steels

Samek

Moor

Penning

et al. 2006

Metall Mater Trans A

176

View full text Add to dashboard Cite

Low-alloy multiphase transformation-induced-plasticity (TRIP) steels offer excellent mechanical properties in terms of elongation and strength. This results from the complex synergy between the different phases, i.e., ferrite, bainite, and retained austenite. The precise knowledge of the austenite-to-martensite transformation kinetics is required to understand the behavior of TRIP steels in a wide array of applications. The parameters determining the stability of the metastable austenite were reviewed and investigated experimentally, with special attention paid to the effect of the chemical composition, the temperature, and the size of the austenite particles. The results show that the stability and rate of transformation of the austenite particles in TRIP steels have a pronounced composition dependence: austenite particles transform at a faster rate in CMnSi TRIP steel than in TRIP steels in which Si is fully or partially replaced by Al and P. The results clearly support the view that (1) both a high C content and a submicron size are required for the room-temperature stability of the austenite particles and (2) the effect of the chemical composition on the transformation is due to its influence on the intrinsic stacking-fault energy. In addition, the composition dependence of the Md 30 temperature was derived by regression analysis of experimental data. The influence of the size of the retained austenite particles on their Ms temperature was studied by means of a thermodynamic model. Both the analysis of the transformation-kinetics data and the microstructural analysis by transmission electron microscopy revealed the very limited role of autocatalysis in the transformation.

show abstract

On the thermodynamic stability of retained austenite in 4340 steel

Cited by 25 publications

References 14 publications

Tensile Response of Two Nanoscale Bainite Composite-Like Structures

Tensile Response of Two Nanoscale Bainite Composite-Like Structures

A study on martensitic phase transformation in 9Cr–1W–0.23V–0.063Ta–0.56Mn–0.09C–0.02N (wt.%) reduced activation steel using differential scanning calorimetry

Influence of alloying elements on the kinetics of strain-induced martensitic nucleation in low-alloy, multiphase high-strength steels

Contact Info

Product

Resources

About