Study of Lattice Strain Evolution in Stainless Steel Under Tension: The Role of Self‐Consistent Plasticity Model

Guo, Xiaoqian; Wu, Peidong; Wang, Huamiao; Mao, Xianbiao

doi:10.1002/srin.201400570

Cited by 14 publications

(2 citation statements)

References 45 publications

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“…In this work, those modeling elements are incorporated into the elastic viscoplastic self-consistent (EVPSC) model [14,[22][23][24][25][26]. The EVPSC model has been successfully applied to study the evolution of internal elastic strain of stainless steel not exhibiting transformation [14,27], magnesium alloys [28][29][30] and zirconium alloys [31]. The polycrystal model is applied to interpret the hardening, texture and phase evolution during the insitu neutron diffraction measurement on the 304 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of martensitic phase transformation on the behavior of 304 austenitic stainless steel under tension

Wang

Jeong

Clausen

et al. 2016

Materials Science and Engineering: A

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The present work integrates in-situ neutron diffraction, electron backscatter diffraction and crystal plasticity modeling to investigate the effect of martensitic phase transformation on the behavior of 304 stainless steel under uniaxial tension. The macroscopic stress strain response, evolution of the martensitic phase fraction, texture evolution of each individual phase, and internal elastic strains were measured at room temperature and at 75°C. Because no martensitic transformation was observed at 75°C, the experimental results at 75°C were used as a reference to quantify the effect of formed martensitic phase on the behavior of 304 stainless steel at room temperature. A crystallographic phase transformation model was implemented into an elasticviscoplastic self-consistent framework. The phase transformation model captured the macroscopic stress strain response, plus the texture and volume fraction evolution of austenite and martensite. The model also predicts the internal elastic strain evolution with loading in the austenite, but not in the martensite. The results of this work highlight the mechanisms that control phase transformation and the sensitivity of modeling results to them, and point out to critical elements that still need to be incorporated into crystallographic phase transformation models to accurately describe the internal strain evolution during phase transformation.

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Section: Introductionmentioning

confidence: 99%

Effect of martensitic phase transformation on the behavior of 304 austenitic stainless steel under tension

Wang

Jeong

Clausen

et al. 2016

Materials Science and Engineering: A

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“…For a comprehensive discussion and comparison of the different linearization procedures the reader is referred to Lebensohn et al (2007). Different linearization schemes from Secant (stiff) to Tangent (compliant) linearization were explored (results not shown in the interest of space) and it was found that affine linearization (Masson et al, 2000) gave the best overall match for the observed response, similar to the findings of Wang et al,(2010) and Guo et al, (2015) Using the concept of Homogeneous Effective Medium (HEM) and enforcing stress equilibrium, the linearized grain level response and the aggregate response can be related using an interaction equation:…”

Section: The Vpsc Modelsupporting

confidence: 62%

Quasi-static and Dynamic Constitutive Behavior of Precipitate Strengthened Al and Mg Alloys: An Experimental and Crystal Plasticity Modeling Investigation

Bhattacharyya¹

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A present challenge in material science lies in applying the knowledge of single crystal level deformation behavior to predict the polycrystalline response. Mean field polycrystal plasticity models such as Elasto-Plastic Self-Consistent (EPSC) and Visco-Plastic SelfConsistent (VPSC) models provide computationally efficient tools to link the single crystal response to the polycrystal aggregate.Many commercial alloys are precipitation hardenable, and the introduction of second phase particles in the matrix leads to an increase in strength and changes the work hardening behavior. Besides affecting the uniaxial flow behavior, the precipitates also alter the anisotropy of the material. The flow response and anisotropy of two commercial precipitation-hardenable alloys were measured experimentally, as well as modeled and predicted using the crystal plasticity approach.In the first part of the dissertation, EPSC modeling was employed to describe the flow behavior, anisotropy and texture evolution of Mg alloy WE43 in the T5 (hot worked and artificially peak aged) temper, which has recently been proposed as a potential lightweight metallic armor. The independent contribution of texture, grain size and various strengthening mechanisms were determined and their impact on individual slip modes was quantified.Additionally, the strain rate sensitivities of each individual mode were determined. The results show that deformation twinning and basal slip can be treated as rate insensitive at least up to the strain rate regime investigated here. The modeling efforts led to the development of a set of parameters which were then validated using data obtained from T3 and T6 tempered samples which possessed microstructures which were far from that of the material used to develop the model. Furthermore, the aging response and the fracture behavior of this alloy was explored and it was established that the T5 temper has the optimum combination of strength and ductility. The results confirm the notion that the poor ageing hardening characteristics of WE43, as compared to Al alloys, is due to a low number density/volume fraction of the strengthening phases.The second part of the dissertation focuses on modeling the homogenous deformation response of Al-7085 alloy, a new high strength precipitation hardenable alloy which is used for aerospace applications and has also been considered as a lightweight metallic armor. First, the texture evolution and large strain behavior was measured and then modeled using the VPSC code, which permitted the role of latent hardening and grain shape effects to be explored. These initial experimental modeling results highlighted the potential importance of 'backstresses' generated by non-shearable precipitates. To account for this, a micromechanical model of kinematic hardening was implemented within the EPSC framework. This modified EPSC model was then used to predict the flow stress and strain anisotropy of this alloy in various tempers.The results demonstrate that incorporation of precipitate-induced...

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Deformation behavior of Mg-8.5wt.%Al alloy under reverse loading investigated by in-situ neutron diffraction and elastic viscoplastic self-consistent modeling

et al. 2016

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The cyclic deformation behavior of extruded .%Al alloy with a conventional extrusion texture and a modified texture is systematically investigated by in-situ neutron diffraction and elastic viscoplastic self-consistent (EVPSC) modeling incorporating a twinning/de-twinning (TDT) scheme. The role of twinning and de-twinning on the deformation behavior of Mg-8.5wt.% Al alloy is investigated in terms of the macroscopic stress-strain response, the evolution of the activities of various deformation mechanisms, the texture evolution, the evolution of the internal elastic strains, and the evolution of the diffraction peak intensities. The alloy with the conventional extrusion texture undergoes twinning during initial compression and de-twinning during reverse tension. The same alloy does not favor twinning during initial tension, but rather during reverse compression. The alloy with a modified texture undergoes twinning during initial tension followed by detwinning during reverse compression. The results provide insights into the effect of initial texture, loading path, slip, twinning, de-twinning on the cyclic behavior of magnesium.

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Study of Lattice Strain Evolution in Stainless Steel Under Tension: The Role of Self‐Consistent Plasticity Model

Cited by 14 publications

References 45 publications

Effect of martensitic phase transformation on the behavior of 304 austenitic stainless steel under tension

Effect of martensitic phase transformation on the behavior of 304 austenitic stainless steel under tension

Quasi-static and Dynamic Constitutive Behavior of Precipitate Strengthened Al and Mg Alloys: An Experimental and Crystal Plasticity Modeling Investigation

Deformation behavior of Mg-8.5wt.%Al alloy under reverse loading investigated by in-situ neutron diffraction and elastic viscoplastic self-consistent modeling

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