Dynamic shear–strain localization and inclusion effects in lath martensitic steels subjected to high pressure loads

Hatem, Tarek M.; Zikry, M. A.

doi:10.1016/j.jmps.2010.04.009

Cited by 25 publications

(7 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shanthraj et.al [29] developed an integrated framework to examine dislocation interactions at block and packet boundaries to investigate failure of martensitic steel accounting for the morphology and orientation for a small number of packets/blocks. A dislocation-density based crystalline model proposed by Hatem and Zikry [30] was applied to investigate the deformation and shear strain localization [31] in lath martensitic steel with a small number of prior austenite grains (PAG). A martensitic steel (M190) and two dual phase ferrite-martensite steels (DF140T and DP980) have also been analysed using a VT-based approach [32,33] and predictions of deformation in micropillar compression tests were compared with experimental data.…”

Section: Introductionmentioning

confidence: 99%

Microscale modelling of the deformation of a martensitic steel using the Voronoi tessellation method

Sun

Meade

O’Dowd

2018

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Microscale modelling of the deformation of a martensitic steel using the Voronoi tessellation method

Sun

Meade

O’Dowd

2018

Journal of the Mechanics and Physics of Solids

View full text Add to dashboard Cite

“…To represent the microstructure of martensite, we used a combination of blocks and packets, which is based on the approach developed by Hatem and Zikry [52]. Blocks are collections of laths with low misorientation, and packets are collections of blocks that have the same habit plane [1,2].…”

Section: Resultsmentioning

confidence: 99%

Dynamic fracture predictions of microstructural mechanisms and characteristics in martensitic steels

Zikry

2015

Engineering Fracture Mechanics

Self Cite

View full text Add to dashboard Cite

a b s t r a c tA dislocation-density-based multiple-slip crystalline plasticity formulation, and an overlapping fracture method were used to investigate the effects of carbide precipitates, M 23 C 6 , and martensitic block size on dynamic fracture in martensitic steels. The interrelated effects of dislocation-density evolution, orientation relations (ORs), adiabatic heating, and heat conduction on fracture behavior were investigated. Precipitates interfaces are shown to be the sites of crack nucleation due to dislocation-density impedance. Dislocation-densities are also shown to relieve tensile stresses and blunt crack propagation. These predictions indicate that the size refinement of martensitic blocks increases crack deflection at block/packet boundaries, which can significantly improve fracture toughness.

show abstract

“…Some parameters of the crystal model were selected from the existing literature. The magnitudes of the Burgers vectors of ferrite and martensite are 2.5 × 10 −10 m and 3 × 10 −10 m, respectively [14,49]. The initial dislocation densities of the slip systems were set to 10 13 m −2 for martensite and 10 9 m −2 for ferrite [45,47].…”

Section: Mechanical Behavior Of Dp800mentioning

confidence: 99%

Study of the Mechanical Behavior of Dual-Phase Steel Based on Crystal Plasticity Modeling Considering Strain Partitioning

Dan

Ren

et al. 2018

Metals

View full text Add to dashboard Cite

The similar crystal structures of martensite (BCT) and ferrite (BCC) cause difficulty in distinguishing the grain orientations of individual phases in dual-phase (DP) steels. A dislocation-based multiphase mixed hardening model is presented, considering both ferrite and martensite strain partitioning, to describe the texture-dependent mechanical behavior of DP steels more precisely. This model is based on the ideals that (i) the volume fractions of the constituent phases and the corresponding strain partitioning function are obtained through in situ tensile experimentation, and (ii) the grain orientations of ferrite and martensite are assumed to be in accordance with the overall texture. We applied the model to calculate the macroscopic and microscopic mechanical behavior of DP800 steel using a crystal plasticity finite element (CPFE) code. The results show that the calculated stress-strain response and textural evolution are in good agreement with the experimental results. The dislocation evolution indicates that the rapid hardening of ferrite induces a high hardening rate for DP steels early in plastic deformation. In addition, for the grains corresponding to the texture center orientations of DP800, the activity and dislocation density evolutions of the slip systems are studied.

show abstract

Dynamic shear–strain localization and inclusion effects in lath martensitic steels subjected to high pressure loads

Cited by 25 publications

References 47 publications

Microscale modelling of the deformation of a martensitic steel using the Voronoi tessellation method

Microscale modelling of the deformation of a martensitic steel using the Voronoi tessellation method

Dynamic fracture predictions of microstructural mechanisms and characteristics in martensitic steels

Study of the Mechanical Behavior of Dual-Phase Steel Based on Crystal Plasticity Modeling Considering Strain Partitioning

Contact Info

Product

Resources

About