Multiscale modelling of stress and strain partitioning in high strength dual phase steels

Asgari, Alireza, Ghadbeigi, Hassan, Pinna, Chrostophe and Hodgson, Peter D. 2013, Multiscale modelling of stress and strain partitioning in high strength dual phase steels, Computer methods in materials science, vol. 12, pp. 163-174.

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Title Multiscale modelling of stress and strain partitioning in high strength dual phase steels
Author(s) Asgari, Alireza
Ghadbeigi, Hassan
Pinna, Chrostophe
Hodgson, Peter D.
Journal name Computer methods in materials science
Volume number 12
Start page 163
End page 174
Total pages 12
Publisher AKAPIT
Place of publication Lodz, Poland
Publication date 2013
ISSN 1641-8581
Summary Multiscale modelling of stress and strain partitioning in DP steel was carried out using both realistic microstructure-based RVE models as well as stochastic microstructures generated by Monte Carlo method. The stochastic microstructure models were shown to resemble that of realistic microstructures, enabling research on the specific aspects of the microstructure that could be difficult to control and study during experimental work. One such feature of the realistic microstructures studied in this work was the grain size and microstructure morphology. The microstructures were generated with varying average grain sizes while all other parameters, such as boundary conditions, material properties and volume fractions of martensite and ferrite were kept constant. It is found that the effect of grain size is much more pronounced during the initial localisation of the plastic deformation at and around the interface of the phases. In addition, the decrease in ductility and increase in strength of the DP steels are directly related to the refinement of grain sizes of each phase and the stress-strain partitioning in between them.
Language eng
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C2 Other contribution to refereed journal
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