International Journal of Plasticity最新文献

{"title":"Mitigating embrittlement of sigma phase in dual-phase high-entropy alloys through heterostructure design","authors":"Sihao Zou ,&nbsp;Chunyu Dong ,&nbsp;Xiaodong Tan ,&nbsp;Zhiyuan Liang ,&nbsp;Weizong Bao ,&nbsp;Binbin He ,&nbsp;Wenjun Lu","doi":"10.1016/j.ijplas.2025.104272","DOIUrl":"10.1016/j.ijplas.2025.104272","url":null,"abstract":"<div><div>The design of dual-phase high-entropy alloys (HEAs) often involves extensive alloying, which can lead to the formation of topologically close-packed (TCP) phases, significantly reducing tensile ductility. Balancing the high hardness of TCP phases while minimizing their embrittling effects is crucial for developing high-performance HEAs. This study, which focuses on the brittle sigma phase, proposes an innovative heterogeneous structural coupling design strategy that simultaneously enhances the strengthening effect of the sigma phase while minimizing its embrittlement role. A (FeCoCrNi)₉₀Al₁₀ HEA with sigma phase is employed as the model material, where a bimodal grain heterogeneous structure is achieved through a short-term high-temperature annealing process at 850 °C for 5 min. A small amount of sigma phase precipitates (∼0.8 vol.%) in the recrystallization (RX) region, modulating the hardness difference between the RX and non-recrystallized (NRX) regions. This induces significant heterogeneous deformation-induced (HDI) stress, while promoting coordinated deformation between regions, thereby triggering continuous work hardening and plastic deformation. As a result, the HEA exhibits an exceptional combination of high strength (1412 MPa) and ductility (14.9 %). The underlying deformation mechanism involves strain hardening driven by HDI stress, which strengthens the RX region and minimizes local strain mismatch between the sigma phase and the FCC matrix, suppressing the nucleation and propagation of interfacial cracks. The present approach presents a promising pathway for co-designing strength and ductility in metallic materials susceptible to TCP phase formation.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"187 ","pages":"Article 104272"},"PeriodicalIF":9.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A meso-scale model to predict flow stress and microstructure during hot deformation of IN718WP","authors":"Nilesh Kumar ,&nbsp;Franz Miller Branco Ferraz ,&nbsp;Ricardo Henrique Buzolin ,&nbsp;Esmaeil Shahryari ,&nbsp;Maria C. Poletti ,&nbsp;Surya D. Yadav","doi":"10.1016/j.ijplas.2025.104271","DOIUrl":"10.1016/j.ijplas.2025.104271","url":null,"abstract":"<div><div>This research presents a dislocation-based hot deformation model to address a nickel-based superalloy's flow stress response and discontinuous dynamic recrystallization (DDRX) behavior. The developed model can predict the flow curves and subsequent microstructure evolutions during the hot deformation. The evolution of microstructure-reliant internal variables was predicted and validated thoroughly. Furthermore, the influence of strain rate and temperature on the glide and climb velocities have also been discussed to reveal more insights into the microstructural development. Dislocation density and DDRX fraction predicted from the model was compared with dislocation density and DDRX fraction obtained from electron backscattered diffraction (EBSD) measurements with reasonable matching. Higher temperatures and slower strain rates provide favorable conditions for DDRX in this alloy. The importance of this model relies on its prediction capability in terms of flow curve, mobile and immobile dislocation densities, DDRX fraction, grain size and dislocation velocities. Single set of parameters were obtained from twelve experimental curves and rest of the eleven curves were predicted by the model using those parameters. The present research approach is helpful to predict the multiple flow curves along with the corresponding microstructure evolution in LSFE materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"187 ","pages":"Article 104271"},"PeriodicalIF":9.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strain-rate and temperature dependent optimum precipitation sizes for strengthening in medium-entropy alloys","authors":"Ziyi Yuan ,&nbsp;Cen Chen ,&nbsp;Xu Zhang ,&nbsp;Lingling Zhou ,&nbsp;Xiaolei Wu ,&nbsp;Fuping Yuan","doi":"10.1016/j.ijplas.2025.104268","DOIUrl":"10.1016/j.ijplas.2025.104268","url":null,"abstract":"<div><div>The (FeCoNi)₈₆Al₇Ti₇ medium-entropy alloy (MEA) with varying sizes and fixed volume fraction of coherent L1₂ precipitates was fabricated, and the effects of precipitation size on mechanical properties at varying strain rates and temperatures were investigated experimentally. An optimum precipitation size for precipitation strengthening can be always observed for the experimental curves under different strain rates and temperatures. The dominant precipitation mechanism under dynamic conditions is found to be transited from the dislocation-shearing mechanism to the Orowan dislocation-looping mechanism with increasing precipitation size. A novel theoretical model was developed to consider the effects of strain rate and temperature on the precipitation shearing strengthening and the Orowan looping strengthening. The predicted precipitation strengthening curves as a function of precipitation size by the newly-developed model are observed to be well consistent with the experimental results under different strain rates and temperatures. The optimum precipitation size for the strongest precipitation strengthening is found to be strain-rate and temperature dependent, and shift to higher values with increasing strain rate and decreasing temperature, as predicted by the theoretical model and validated by the experimental results.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"187 ","pages":"Article 104268"},"PeriodicalIF":9.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Attribution of heterogeneous stress distributions in low-grain polycrystals under conditions leading to damage","authors":"Samuel D. Dunham ,&nbsp;Yinling Zhang ,&nbsp;Nan Chen ,&nbsp;Coleman Alleman ,&nbsp;Curt A. Bronkhorst","doi":"10.1016/j.ijplas.2025.104258","DOIUrl":"10.1016/j.ijplas.2025.104258","url":null,"abstract":"<div><div>In high-purity polycrystalline metallic materials, voids tend to favor grain boundaries as nucleation sites due to the elevated stress states produced by granular interactions and the weakened grain boundary from the relative atomic disorder. To quantify the key factors of this elevated stress state, simple compression of a small multi-grain cylinder of body-centered cubic tantalum was simulated using a single crystal plasticity model that incorporates non-Schmid effects. Four increasingly complex synthetic microstructures were created to tractably incorporate grain boundary interactions, and a statistically significant number of combinations were performed by varying the initial crystallographic orientations of the microstructure. Most of these simulations produce the maximum von Mises stress on a grain boundary and less frequently at the multi-grain junctions. To build a statistical model for the maximum von Mises stress at the grain boundary, physically based features that could contribute to the elevated stress state were selected. Then, a learning algorithm based on information theory was used to identify which of these features contributed the most information to the data set. The identified features include a grain’s propensity to accommodate both elastic and plastic deformations and their directional components. The misalignment of the direction of each grain’s mechanical response was found to be strongly correlated to the magnitude of the stress near the grain boundary. For all of the synthetic microstructures, the statistical models produce a residual distribution that is nearly Gaussian with a variance of, at most, 10% of the prior distribution. The successful performance of the statistical model implies the correct identification of the physical features that cause severe stress localization in polycrystalline materials. The statistical models constructed here can be used to formulate a physically motivated void nucleation model which is sensitive to a microstructure’s propensity to produce elevated stress states. These statistical models also enable the design of material microstructures, in which the crystallographic orientation is chosen to resist void nucleation.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"186 ","pages":"Article 104258"},"PeriodicalIF":9.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-physics model for the evolution of grain microstructure","authors":"I.T. Tandogan ,&nbsp;M. Budnitzki ,&nbsp;S. Sandfeld","doi":"10.1016/j.ijplas.2024.104201","DOIUrl":"10.1016/j.ijplas.2024.104201","url":null,"abstract":"<div><div>When a metal is loaded mechanically at elevated temperatures, its grain microstructure evolves due to multiple physical mechanisms. Two of which are the curvature-driven migration of the grain boundaries due to increased mobility, and the formation of subgrains due to severe plastic deformation. Similar phenomena are observed during heat treatment subsequent to severe plastic deformation. Grain boundary migration and plastic deformation simultaneously change the lattice orientation at any given material point, which is challenging to simulate consistently. The majority of existing simulation approaches tackle this problem by applying separate, specialized models for mechanical deformation and grain boundary migration sequentially. Significant progress was made recognizing that the Cosserat continuum represents an ideal framework for the coupling between different mechanisms causing lattice reorientation, since rotations are native degrees of freedom in this setting.</div><div>In this work we propose and implement a multi-physics model, which couples Cosserat crystal plasticity to Henry–Mellenthin–Plapp (HMP) type orientation phase-field in a single thermodynamically consistent framework for microstructure evolution. Compared to models based on the Kobayashi–Warren–Carter (KWC) phase-field, the HMP formulation removes the nonphysical term linear in the gradient of orientation from the free energy density, thus eliminating long-range interactions between grain boundaries. Further, HMP orientation phase field can handle inclination-dependent grain boundary energies. We evaluate the model’s predictions and numerical performance within a two-dimensional finite element framework, and compare it to a previously published results based on KWC phase-field coupled with Cosserat mechanics.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104201"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stress-fractional modelling of dilatancy behavior under monotonic loading based on a new yield surface of coarse-grained soil","authors":"Erlu Wu ,&nbsp;Wanli Guo ,&nbsp;Na Li ,&nbsp;Ping Jiang ,&nbsp;Wei Wang ,&nbsp;Yifei Sun","doi":"10.1016/j.ijplas.2024.104236","DOIUrl":"10.1016/j.ijplas.2024.104236","url":null,"abstract":"<div><div>Fractional calculus has been proven to be a powerful modeling tool for soil, which is often used to develop the dilatancy equation in the model construction. However, the existing fractional-order dilatancy equation incorporating the state parameter has the unsatisfying simulations on the dilatancy behaviors of coarse-grained soil, which strongly depends on the material state, i.e., the stress and void ratio. For that, a new fractional-order dilatancy model incorporating the stress and strain states is developed for coarse-grained soil. Originally, a new yield function applicable to coarse-grained soil is proposed by modifying the yield function of Cam-clay model, in which a parameter controlling the shape of the yield surface is introduced. Then, a fractional-order dilatancy model for coarse-grained soil is derived by using the fractional derivative of the new yield function. Meanwhile, an evolution law for the order of fractional derivative is put forward, which shows the development with the shear strain. Ulteriorly, drained triaxial compression test results of three coarse-grained soils with only one void ratio and two coarse-grained soils with three void ratios are simulated, and it is found that there is a good agreement between the model simulations and test results. Finally, the elastoplastic model developed by incorporating the modified yield function and fractional-order dilatancy model into Cam-clay model is used to simulate the bearing capacity of one foundation, and the result reveals that the introduction of fractional calculus will not encounter convergence issue in finite element analysis.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104236"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating the role of combined latent hardening due to slip-slip and slip-twin interaction for modeling the evolution of crystallographic texture in high nitrogen steels","authors":"Bhanu Pratap Singh,&nbsp;Jyoti Ranjan Sahoo,&nbsp;Sumeet Mishra","doi":"10.1016/j.ijplas.2024.104215","DOIUrl":"10.1016/j.ijplas.2024.104215","url":null,"abstract":"<div><div>A thorough framework for addressing the evolution of crystallographic texture in high nitrogen steels is developed in the present work. The elementary doctrine of the proposed framework is the inclusion of latent hardening due to slip-slip interaction along with slip-twin interaction in the visco-plastic self-consistent (VPSC) model for simulating the evolution of crystallographic texture in high nitrogen steels. The latent hardening due to slip-slip interaction is accounted for by specifying the complete interaction matrix (12 × 12), which allows all possible interactions between different slip systems. The latent hardening due to slip-slip interaction acts in combination with the latent hardening due to slip-twin interaction in raising the deformation resistance of the slip systems, which in turn enhances the propensity of twinning for the orientations along the β-fiber between the ideal Copper and S position. As a result, these β-fiber orientations are destabilized and reorient towards the <span><math><mi>α</mi></math></span>-fiber orientations in the Euler space. The proposed modeling framework is validated against experimental orientation distribution function sections after different rolling reductions. It was observed that inclusion of the combined latent hardening effect provides a superior agreement with the experimental textures compared to the standard approach of considering only the latent hardening due to slip-twin interaction in low stacking fault energy materials. The modeling work is aptly supported by detailed microstructural characterization involving estimation of twin fraction via X-ray line profile analysis, twin characteristics via transmission electron microscopy and the reorientation caused due to twinning via electron back scatter diffraction.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104215"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ experiment and numerical modelling of the intragranular and intergranular damage and fracture in plastic deformation of ductile alloys","authors":"Wang Cai ,&nbsp;Chaoyang Sun ,&nbsp;Chunhui Wang ,&nbsp;Lingyun Qian ,&nbsp;M.W. Fu","doi":"10.1016/j.ijplas.2024.104217","DOIUrl":"10.1016/j.ijplas.2024.104217","url":null,"abstract":"<div><div>In this research, a unified damage indication considering the intragranular and intergranular damage initiation and evolution was developed for studying the damage and fracture behaviours of the excellent ductile alloys represented by TWIP steels, and a cohesive zone model-crystal plasticity finite element method (CZM-CPFEM) approach was developed, where the crystal plasticity with coupled slip and twinning and the strain energy-based damage criterion was employed to reveal the plastic deformation and damage in grain interior (GI), while the quadratic nominal stress (QUADS) and the power law of the CZM were selected to describe the damage and cracking at the grain boundaries (GBs). The stress-strain responses, twin evolutions, damage nucleation and cracking of fine-grained (FG) and fine-/ultrafine-grained (F/UFG) TWIP steels were validated by in-situ SEM/EBSD tensile experiments. The effects of grain size, misorientation angle, grain orientation and initial microvoids on the GI and GB damage and fracture were studied and analysed by combining micromechanical tests and the CZM-CPFEM approach. The results demonstrated that the interaction of deformation mechanisms promoted the preferential initiation of microcracks at GBs and their junctions, while slip bands and twin bundles in GI induced the rapid growth and extension of the localized microcracks, eventually resulting in the mixed fracture mode of intergranular and intragranular cracks. In addition, GB damage was dominant for F/UFG TWIP steels. Increasing grain size can effectively suppress GB damage and increase the proportion of GI damage. Larger misorientation angles can weaken GB properties, while smaller misorientation angles effectively promote strain/stress coordination and delay GI and GB damage. Larger Schmid factors for slip and twinning are favourable for activating dislocations and twins, promoting strain/stress coordination to retard microcrack initiation and improving uniform elongation. Moreover, both initial microvoids can effectively reduce uniform tensile strength (UTS) and fracture strain. Specifically, the microvoids located at GBs and their junctions increase the percentage of GB damage and the possibility of intergranular cracking, especially at the quadruple junctions of GBs.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104217"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FCC/B2 phase boundary variant-sensitive fatigue cracking in a eutectic high entropy alloy at high temperature","authors":"Qinan Han ,&nbsp;Siyu Zhao ,&nbsp;Yuanbo T. Tang ,&nbsp;Zhanglun Lu ,&nbsp;Maureen A. Lopez ,&nbsp;Ang Li ,&nbsp;Haitao Cui ,&nbsp;Roger C. Reed","doi":"10.1016/j.ijplas.2024.104223","DOIUrl":"10.1016/j.ijplas.2024.104223","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) show the potential for high-temperature structural applications, with their superior fatigue properties of particular significance. However, fatigue cracking can be initiated in these materials with phase boundaries (PBs) as a specific source of weakness. In this work, a model eutectic HEA is studied using both <em>in situ</em> and <em>ex situ</em> methods with emphasis on unravelling the roles of two variants of FCC/B2 PBs – (i) PBs between B2/Prior FCC (denoted here as Type I PB) and (ii) PBs between B2/eutectic FCC (denoted as Type II PB). Our work addresses two fundamental questions. First, do these two types of PB confer differences in behaviour on the microstructural scale? And second, under what conditions is fatigue cracking promoted or hindered? Our work demonstrates conclusively that the two variants of PB do indeed behave differently being influenced by a varying hardness mismatch on either side of the PBs – as confirmed by our nanoindentation results. Moreover, the PBs demonstrate different roles in fatigue cracking, being capable of both promotion and inhibition, depending on the angle between the crack direction and the directional morphology of the eutectic lamellar structure. In addition, certain microstructural orientations demonstrate the greatest resistance to fatigue cracking. These findings provide new insights for improving fatigue-resistant design by microstructural engineering, because the strengthening effect of PBs can be leveraged, and the eutectic lamellar direction can be optimised.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104223"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling inter- and intra-granular dislocation transport using crystal plasticity","authors":"Subhendu Chakraborty ,&nbsp;Abigail Hunter ,&nbsp;D.J. Luscher","doi":"10.1016/j.ijplas.2024.104222","DOIUrl":"10.1016/j.ijplas.2024.104222","url":null,"abstract":"<div><div>This work presents the development of a crystal plasticity material model that incorporates both dislocation transport within grains and dislocation transfer across grain boundaries. This model has been implemented in the open-source finite element code MOOSE. In addition, a novel geometry-based criterion is developed to determine the direction of dislocation transfer across grain boundaries. The transfer criterion incorporates the geometric features of the grain boundary, such as the grain boundary plane normal, and its misorientation, which is accounted for through the orientation of the incoming and outgoing slip systems. The model is tested with several cases, including a copper single crystal, bi-crystal, and polycrystal. The development of the transfer criterion, implementation of the model, and its application to these test cases are discussed in detail.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104222"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}