Simulation of martensitic microstructures in a low-alloy steel

Graf, Marius; Kuntz, M.; Autenrieth, H.; Diewald, Felix; Müller, Ralf

doi:10.1007/s00419-020-01845-6

Cited by 5 publications

(7 citation statements)

References 104 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike the PTMT theory, the habit plane and orientation relationship between parent and product phase are predicted based on the interfacial defects, but without High Resolution TEM the crystallographic geometry of interfacial disconnections is difficult to confirm [ 30 , 31 ]. Due to the simple calculation and highly accurate physical results from the PTMT theory, it has been employed widely to obtain the crystallographic features of alloys during martensitic transformation [ 21 , 32 , 33 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Microstructural Morphology of Ti-6Al-4V Alloy by Crystallographic Analysis and Phase Field Simulation

2022

View full text Add to dashboard Cite

Formation of a habit plane during martensitic transformation is related to an invariant plane strain transformation, which involves dislocation glide and twins. In the current work, the Phenomenological Theory of Martensitic Transformation (PTMT) is employed to study the crystallographic features while the phase field simulation is used to study the microstructure evolution for martensitic transformation of Ti-6Al-4V alloy. Results show that mechanical constraints play a key role in the microstructure evolution. It is shown that a twinned structure with very small twinned variants is geometrically difficult to form due to the lattice parameters of Ti-6Al-4V alloy. It is concluded that the predicted habit plane from the PTMT is consistent with results of the micro-elastic theory. The formation of a triangular morphology is favored geometrically and elastically.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of Microstructural Morphology of Ti-6Al-4V Alloy by Crystallographic Analysis and Phase Field Simulation

2022

View full text Add to dashboard Cite

show abstract

“…The motivation is to provide a simulation model, which is able to predict the martensite microstructure with twelve variants of several prior austenite grains (PAGs) with less computing resources, as it would be necessary with three-dimensional simulations, cf. [1]. An exemplary prior austenite grain (PAG) microstructure with an area of 25 2 µm 2 is discretized with 200 2 4-node fully integrated quadrilateral elements.…”

Section: Phase Field Model For Martensitic Transformationsmentioning

confidence: 99%

Phase field modeling and simulation of the evolution of twelve crystallographic martensite variants in austenitic parent grains

Graf

Kuntz

Autenrieth

et al. 2021

Proc Appl Math and Mech

Self Cite

View full text Add to dashboard Cite

Important criteria for the design of dynamically loaded components are strongly influenced by the microstructural properties. Motivated by this, models were developed which can predict the lifetime of components based on the microstructure. With regard to steel materials, the martensitic microstructure is of great importance. The subject of current research is therefore to work on simulation models that can predict the morphology of the microstructure depending on the process parameters during production. In this context a phase‐field model, which considers twelve crystallographic martensite variants corresponding to the Nishiyama‐Wassermann orientation relationship, is presented. The order parameters are used to interpolate between the initial (austenite) and final (martensite) state. With this model, the evolution of a thermal induced martensitic microstructure is simulated. In order to define the displasive characteristics of the martensite variants, the well‐known phenomenological theory of martensite crystallography is deployed. Simulations using the finite element method in the small strain context show the applicability of the model. A qualitative comparison of the simulated microstructures with experimental data is carried out.

show abstract

“…The transformation strains εi are calculated via the phenomenological theory of martensite crystallography, cf. [1]. For the initial state, nuclei of each variant are randomly distributed at crystal defects (austenit grain boundaries).…”

Section: Phase Field Model For Martensitic Transformationsmentioning

confidence: 99%

“…The phase field model and its numerical implementation applied in this work is described in detail by [1] and is briefly presented in the following. By introducing fields of order parameters φ i , i = 1, ..., 12 as degrees of freedom, the material condition is decribed.…”

Section: Phase Field Model For Martensitic Transformationsmentioning

confidence: 99%

“…A simplified prior austenite grain (PAG) microstructure with a volume of 9.0 3 µm 3 is generated using Neper [2] and discretized with 108 3 8-node fully integrated hexahedron elements. In contrast to [1] an advanced interpolation h i is used to reflect stress-assisted auto-catalytic nucleation. At each time step it is checked at the element level which order parameter had the maximum value in the previous time step.…”

Section: Phase Field Model For Martensitic Transformationsmentioning

confidence: 99%

See 1 more Smart Citation

Phase field modeling and simulation of the evolution of twelve crystallographic martensite variants in austenitic parent grains – three‐dimensional simulations

Graf

Kuntz

Autenrieth

et al. 2021

Proc Appl Math & Mech

Self Cite

View full text Add to dashboard Cite

Due to its outstanding strength martensitic microstructures are of great importance in steels. Accordingly, this work deals with a simulation model capable of simulating the evolution of the martensitic microstructure. The focus is on the consideration of twelve crystallographic martensite variants corresponding to the Nishiyama-Wassermann orientation relationship. For this, the phase field method, which regularizes sharp interfaces as smooth transition zone on basis of order parameters is used. The order parameters are used to interpolate between the initial parent phase austenite and the final product phase martensite. The evolution of a martensitic microstructure initiated by a supercooling under isothermal conditions is considered. In order to define the displacive characteristics of the martensite variants, the well-known phenomenological theory of martensite crystallography is deployed. Three-dimensional simulations using the finite element method in the small strain context show the applicability of the model to polycrystalline structures.

show abstract

Simulation of martensitic microstructures in a low-alloy steel

Cited by 5 publications

References 104 publications

Study of Microstructural Morphology of Ti-6Al-4V Alloy by Crystallographic Analysis and Phase Field Simulation

Study of Microstructural Morphology of Ti-6Al-4V Alloy by Crystallographic Analysis and Phase Field Simulation

Phase field modeling and simulation of the evolution of twelve crystallographic martensite variants in austenitic parent grains

Phase field modeling and simulation of the evolution of twelve crystallographic martensite variants in austenitic parent grains – three‐dimensional simulations

Contact Info

Product

Resources

About