Microstructural Effects of High Strain Rate Deformation

Leslie, W. C.

doi:10.1007/978-1-4615-8696-8_34

Cited by 29 publications

(6 citation statements)

References 51 publications

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“…This is also supported by the increased retained austenite content caused by a re-austenitisation followed by rapid quenching ( _ T > 10 4 C=s) and after cessation of the deformation. Another possible explanation could be that the twins were induced by deformation, which has been reported by several researchers when studying high strain rate behaviour for numerous metallic materials [22][23][24][25]. Murr et al [24] for example, studied deformation induced twins in bcc iron during impact crater testing at different impact velocities ranging from 0.5 km/s to 3.8 km/s.…”

Section: Formation Mechanisms and Microstructure Evolution Of Wlsmentioning

confidence: 97%

Formation mechanisms of white layers induced by hard turning of AISI 52100 steel

et al. 2015

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Section: Formation Mechanisms and Microstructure Evolution Of Wlsmentioning

confidence: 97%

Formation mechanisms of white layers induced by hard turning of AISI 52100 steel

et al. 2015

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“…Constituent deformation mechanisms are taken largely from [36], in which the mechanisms are deduced from changes in the preferred orientation (crystallographic texture) with deformation. For simplicity, we do not include twinning modes in either phase, though they are observed experimentally in the α phase at shock pressures below the transformation threshold [45,46]. Table 1 lists parameters for the material model.…”

Section: Model Specificsmentioning

confidence: 99%

Crystal level continuum modelling of phase transformations: the α ↔ epsi transformation in iron

Barton¹,

Benson²,

Becker³

2005

Modelling Simul. Mater. Sci. Eng.

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We present a crystal level model for thermo-mechanical deformation with phase transformation capabilities. The model is formulated to allow for large pressures (on the order of the elastic moduli) and makes use of a multiplicative decomposition of the deformation gradient. Elastic and thermal lattice distortions are combined into a single lattice stretch to allow the model to be used in conjunction with general equation of state relationships. Phase transformations change the mass fractions of the material constituents. The driving force for phase transformations includes terms arising from mechanical work, the temperature dependent chemical free energy change on transformation, and the interaction energy among the constituents. Deformation results from both these phase transformations and elasto-viscoplastic deformation of the constituents themselves. Simulation results are given for the α to ϵ phase transformation in iron. Results include simulations of shock-induced transformation in single crystals and of compression of polycrystals. Results are compared with available experimental data.

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“…For example, the annihilation process of dislocations, typical for large plastic deformation, is reduced. As it was concluded by Leslie [14], in ferrite structure, strained at low temperature or at high strain rates, the edge components of dislocations can move at higher rates than screw components. Hence, elongated segments of the latter remain in the structure.…”

Section: Modellingmentioning

confidence: 81%