Critical Assessment 7: Quenching and partitioning
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TLDR
A critical assessment of the field of quench and partitioning can be found in this paper, with particular focus on the physical metallurgy and transformation mechanisms, process variations, mechanical behaviour, and industrial implementation.Abstract:
Quenching and partitioning is a relatively new heat treatment concept to generate microstructures containing retained austenite stabilised by carbon partitioning from martensite. Research on quench and partitioning has been conducted by numerous groups, and this critical assessment provides some of the authors’ perspectives on progress and understanding in the field, with particular focus on the physical metallurgy and transformation mechanisms, process variations, mechanical behaviour, and industrial implementation. While much progress has been made, the field provides rich opportunity for further understanding and development.read more
Citations
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Journal ArticleDOI
Thermal and mechanical stability of retained austenite surrounded by martensite with different degrees of tempering
TL;DR: In this paper, the effect of tempering in martensite is isolated from other factors influencing the stability of austenite, and the thermal stability during heating of retained Austenite was evaluated by monitoring phase fractions as a function of controlled temperature employing both dilatometry and magnetometry measurements.
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Near-Ac3 austenitized ultra-fine-grained quenching and partitioning (Q&P) steel
TL;DR: In this article, the influence of an intercritical anneal and a full austenitizing close to the A c 3 temperature on the mechanical properties of a quenching and partitioning (Q&P) processed medium Mn steel is reported.
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Carbon and strain partitioning in a quenched and partitioned steel containing ferrite
TL;DR: In this paper, the authors applied a hot rolling direct quenching and partitioning (HDQ&P) process to a low-C low-Si Al-added steel and obtained a Q&P steel containing 40 % of ferrite.
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Microstructural evolution during quenching and partitioning of 0.2C-1.5Mn-1.3Si steels with Cr or Ni additions
D.T. Pierce,D.T. Pierce,D.R. Coughlin,Kester D. Clarke,Kester D. Clarke,E. De Moor,Jonathan D. Poplawsky,D. L. Williamson,B. Mazumder,B. Mazumder,John G. Speer,A. Hood,Amy J. Clarke,Amy J. Clarke +13 more
TL;DR: In this article, the influence of Cr and Ni additions and quench and partition (Q&P) processing parameters on the microstructural development, including carbide formation and austenite retention during Q&P, was studied in two steels with a base composition of 0.2C-1.3Si wt.% and additions of 1.5
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Controlling the work hardening of martensite to increase the strength/ductility balance in quenched and partitioned steels
TL;DR: In this article, martensite properties were varied through heat treatment in a low carbon Q&P steel consisting of retained austenite and martensites and additional conditions were produced by reheating the steel to 450°C for 30min or to 700°C followed immediately by quenching.
References
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A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels
D.P. Koistinen,R.E. Marburger +1 more
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Carbon partitioning into austenite after martensite transformation
TL;DR: In this paper, a model is developed to describe the endpoint of carbon partitioning between quenched martensite and retained austenite, in the absence of carbide formation.
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The effect of morphology on the stability of retained austenite in a quenched and partitioned steel
TL;DR: In this paper, X-ray diffraction and transmission electron microscopy experiments are employed to investigate the mechanical stability of retained austenite in a quenching and partitioning steel.