Interaction between recrystallization and phase transformation during intercritical annealing in a cold-rolled dual-phase steel: A cellular automaton model

Zheng, Chengwu; Raabe, Dierk

doi:10.1016/j.actamat.2013.05.040

Cited by 168 publications

(95 citation statements)

References 39 publications

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“…These features indicate that it is possible to model the microstructure evolution within a unified frame [64][65][66]. In contrast to the limited applicability of the macro-scale models, e.g., the phenomenological model and the statistical model, this characteristic of mesoscopic models also shows the latent advantage of the numerical solution of the complexity of microstructural evolution globally , such as normal grain growth [68][69][70][71][72][73][74][75][76], recrystallization [82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98] and phase transformation [100][101][102][103]. 4.…”

Section: Introductionmentioning

confidence: 99%

Prediction of microstructural evolution during hot forging

2014

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-Microstructural evolution, which is governed by temperature, strain and strain rate during hot forging, is a key factor influencing mechanical properties. Understanding the microstructural evolution of metals and alloys in hot forging has a great importance for the designers of metal forming processes. The principal objective of this paper is to provide an overview of the models for the prediction of microstructural evolution for metals and alloys during the hot forging process. In this review paper, the models are divided into four categories, including the phenomenological, physically-based, mesoscale and artificial-neural-network models, to introduce their developments, prediction capabilities and application scopes. Additionally, some limitations and objective suggestions for the further development of the modelling of microstructural evolution during hot forging are proposed.

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Section: Introductionmentioning

confidence: 99%

Prediction of microstructural evolution during hot forging

2014

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“…As the interaction occurs, the kinetics of recrystallization and transformation are increased. 3,6,13,16,21 The austenite phase nucleates first at the deformed ferrite grain boundaries. 22 On the other hand, austenite provides a preferred recrystal- lization nucleation site for the non-recrystallized ferrite.…”

Section: Resultsmentioning

confidence: 99%

“…URA shifts the start temperature of recrystallization to higher values near and above Ac 1 . 3,[7][8][9][10][11][12][13][14][15] So, in the intercritical temperature range, recrystallization and phase transformation proceed concurrently and with a mutual "interaction". The intensity of the interaction depends of the amount of stored energy and determines the final microstructure of the steel.…”

Section: Introductionmentioning

confidence: 99%

Grain-refining ability of ultra-rapid annealing for low-carbon steel: severe plastic deformation

Mostafaei¹,

Kazeminezhad²

2017

Mater. Tehnol.

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To study the grain-refinement ability of ultra-rapid annealing (URA), heating rates from 0.3°C/s up to 1200°C/s with conventional annealing and URA in the intercritical temperature range were performed on severely deformed low-carbon steel. The results show that recrystallization in conventional annealing is completed below the critical temperature of Ac1 without grain refinement. URA up to 730°C at a heating rate of 200°C/s causes grain refinement due to full interaction between the recrystallization and phase transformation. URAs up to 730°C with heating rates of 600°C/s and 1000°C/s lead to partial grain refinement and no grain refinement, respectively. During annealing with a heating rate of 1200°C/s, the temperature should reach 760°C for the occurrence of recrystallization leading to grain refinement. The sample URAed at 600°C/s up to 730°C shows the maximum hardness due to fine grains being partially formed. Keywords: conventional annealing, ultra-rapid annealing, interaction, severe plastic deformation Za {tudij sposobnosti udrobnjenja zrn pri zelo hitrem`arjenju, so bile uporabljene hitrosti segrevanja od 0,3°C/s do 1200°C/s pri obi~ajnem in zelo hitrem`arjenju v interkriti~nem temperaturnem obmo~ju na mo~no deformiranem malooglji~nem jeklu. Rezultati ka`ejo, da je rekristalizacija pri konvencionalnem`arjenju zaklju~ena pod kriti~no temperaturo Ac1 brez udrobnjenja zrn. Zelo hitro`arjenje do 730°C pri hitrosti ogrevanja 200°C/s povzro~i udrobnjenje zrn, zaradi polne interakcije med rekristalizacijo in fazno premeno. Zelo hitro`arjenje do 730°C , s hitrostjo ogrevanja 600°C/s in 1000°C/s povzro~i delno udrobnjenje zrn oz. udrobnjenja zrn ni. Med ogrevanjem s hitrostjo 1200°C/s je potrebno dose~i temperaturo 760°C, da se pojavi rekristalizacija, ki povzro~i udrobnitev zrn. Vzorec po zelo hitrem`arjenju z 600°C/s do 730°C ka`e maksimalno trdoto zaradi delnega nastanka drobnih zrn.

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“…CAFE has been used successfully for predicting ductile to brittle transitional fracture [1], oxide cracking in hot rolling [2], grain instability [3], solidification [4], friction stir welding [5], recrystallisation [6] and dynamic strain induced transformation [7]. Recently we have applied this approach to 3D fracture simulation in polycrystals [8].…”

Section: Introductionmentioning

confidence: 99%

Towards mechanism-based simulation of impact damage using exascale computing

Shterenlikht

Margetts²,

McDonald

et al. 2017

AIP Conference Proceedings

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Abstract. Over the past 60 years, the finite element method has been very successful in modelling deformation in engineering structures. However the method requires the definition of constitutive models that represent the response of the material to applied loads. There are two issues. Firstly, the models are often difficult to define. Secondly, there is often no physical connection between the models and the mechanisms that accommodate deformation. In this paper, we present a potentially disruptive two-level strategy which couples the finite element method at the macroscale with cellular automata at the mesoscale. The cellular automata are used to simulate mechanisms, such as crack propagation. The stress-strain relationship emerges as a continuum mechanics scale interpretation of changes at the micro-and meso-scales. Iterative two-way updating between the cellular automata and finite elements drives the simulation forward as the material undergoes progressive damage at high strain rates. The strategy is particularly attractive on large-scale computing platforms as both methods scale well on tens of thousands of CPUs.

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Interaction between recrystallization and phase transformation during intercritical annealing in a cold-rolled dual-phase steel: A cellular automaton model

Cited by 168 publications

References 39 publications

Prediction of microstructural evolution during hot forging

Prediction of microstructural evolution during hot forging

Grain-refining ability of ultra-rapid annealing for low-carbon steel: severe plastic deformation

Towards mechanism-based simulation of impact damage using exascale computing

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