A dislocation density based model for twinning induced softening of TWIP steel

Guo, Xiangru; Sun, Chaoyang; Li, Runguang; Guo, Ning; Yu, Wan-Chin; Su, Zexing; Yan, Shunping

doi:10.1016/j.commatsci.2017.07.013

Cited by 14 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The classic mixture law taking the role of twins into account in dislocation multiplication in the form of average twin spacing was proposed by Bouaziz et al [12] and was developed by Allain et al [13] based on the geometrical revolution of microtwins. On this basis, this model was employed to describe the twin nucleation, propagation and growth of TWIP steel single crystal, and the results showed that the twinning induced softening, which originate from a lower critical twinning stress of twin growth than nucleation [14]. However, the effects of strain rate or temperature were absent in these models.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical behaviour induced by adiabatic temperature rise of Fe–Mn–Al–C steel

Wang

Sun

Qian

et al. 2021

Materials Science and Technology

View full text Add to dashboard Cite

The dynamic mechanical behaviour induced by adiabatic temperature rise of Fe–Mn–Al–C twinning-induced plasticity steel was investigated via the dynamic tensile test and a dynamic constitutive model. The twinning kinetics and recovery factor, which are all rate- and temperature-dependent, were introduced to describe the stress–strain relationships. Verified by experimental flow stress and twin volume fraction, simulated results are in good agreement with experimental ones. Because of the more active twinning that contributing plasticity at a higher strain rate, the decreasing plasticity from dislocation slip induces a retardation of dislocation multiplication and is responsible for the low strain hardening rate. In the later stage, the adiabatic heating promotes dislocation annihilation by enhanced dynamic recovery, resulting in the negative rate-dependent hardening.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical behaviour induced by adiabatic temperature rise of Fe–Mn–Al–C steel

Wang

Sun

Qian

et al. 2021

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…Twinning-induced plasticity (TWIP) steel exhibits superior strength and ductility caused by the excellent work-hardening capability, which has met the tremendous demand of reliability and cost-effectiveness of structural applications in the automotive industry [1][2][3]. The high strain hardening rate (SHR) is largely due to the mechanical twins that act as obstacles for gliding dislocations, which gradually reduces the dislocation mean free path (MFP) by the dynamic Hall-Petch effect [4,5]. Moreover, the improvement of work-hardening capability contributes to uniform elongation by suppressing the deformation heterogeneity and delaying the plastic instability.…”

Section: Introductionmentioning

confidence: 99%

Strain rate-dependent hardening with dislocation-twin interaction of Fe–Mn–Al–C steel using crystal plasticity

Sun

et al. 2019

Materials Science and Technology

Self Cite

View full text Add to dashboard Cite

A crystal plasticity finite element model with dislocation-twin interaction was developed to study the strain rate-dependent hardening of Fe–Mn–Al–C twinning-induced plasticity steel. Microstructural state variables including twinning space and dislocation density were incorporated to describe the mechanical twins hindering gliding dislocations. In situ scanning electron microscope tension and electron backscatter diffraction tests were conducted as validation and supplement. Predicted stress and strain hardening rate at various strain rates agree well with the experimental results. The increasing strain hardening stage is attributed to the dynamic competition between deformation twinning and dynamic recovery of dislocations. The intergranular deformation heterogeneity associated with the competitive activities of deformation mechanisms was also studied. The results indicate a larger contribution of slip to overall hardening than twinning. GRAPHICAL ABSTRACT

show abstract

Constitutive Modeling with Critical Twinning Stress in CoCrFeMnNi High Entropy Alloy at Cryogenic Temperature and Room Temperature

et al. 2020

View full text Add to dashboard Cite

A dislocation density based model for twinning induced softening of TWIP steel

Cited by 14 publications

References 43 publications

Dynamic mechanical behaviour induced by adiabatic temperature rise of Fe–Mn–Al–C steel

Dynamic mechanical behaviour induced by adiabatic temperature rise of Fe–Mn–Al–C steel

Strain rate-dependent hardening with dislocation-twin interaction of Fe–Mn–Al–C steel using crystal plasticity

Constitutive Modeling with Critical Twinning Stress in CoCrFeMnNi High Entropy Alloy at Cryogenic Temperature and Room Temperature

Contact Info

Product

Resources

About