Micromechanics based modeling to predict flow behavior and plastic strain localization of dual phase steels

Micromechanical modelling of bending under tension forming behaviour of dual phase steel 600

“…Moreover, predominant stress localization regions are detected, apparently, near to the interface between the soft Ferrite matrix and the hard Martensite islands. The same findings given by Paul [4], the stress distributions both in Martensite and Ferrite matrix are not uniform or similar and varies depended on the shapes of single phase morphology.…”

“…Recently, Paul and Kumar [4] successfully predicted the plastic strain localization and plastic instability of DP steel by the micromechanics approach. Kouznetsova and Geers [9] developed a multi-scale model to predict the grain orientation.…”

“…Their macroscopic mechanical properties not only depend on the mechanical properties of the individual phases, but also it depends on the spatial distribution and morphology of the Martensite phase [4]. Since the macroscopic mechanical properties of DP steels strongly depend on the microstructure, a microscopic sub-structure continuum model provides an accurate way of predicting micro-mechanical behaviour.…”

Real microstructure based micromechanical model to simulate microstructural level deformation behavior and failure initiation in DP 590 steel

“…initiation and separation of surfaces) occurs quickly in that localized zone by initiation, growth and coalition of voids or decohesion of ferrite-martensite interface. By knowing the importance of strain localization in fracture process many researchers studied strain localization on different steels; they are DP steels [22,23,26,27], TWIP steels [24], Ferrite-pearlite steel [28], etc. In this work, flow behavior and plastic strain localization of DP 590 steel is investigated.…”

Prediction of Ductile Fracture Behaviors for 42CrMo Steel at Elevated Temperatures

“…Yoon and Lee (Ref 12) found that the fracture mechanism changes from brittle to ductile with increase of the forming temperature for AZ31 magnesium alloy sheet. Paul and Kumar (Ref 13,14) employed a micromechanics-based approach by means of representative volume element to predict the flow behavior, plastic strain localization, and plastic instability of dual phase steels. Shore et al (Ref 15) optimized the hot forming parameters for Incoloy 901 alloy to avoid the risk of premature fracture.…”