International Journal of Plasticity最新文献

{"title":"High-velocity fragmentation and spall fracture of steel AF9628","authors":"T. Virazels, J. García-Molleja, J.C. Nieto-Fuentes, M. Gonzales, F. Sket, J.A. Rodríguez-Martínez","doi":"10.1016/j.ijplas.2025.104454","DOIUrl":"https://doi.org/10.1016/j.ijplas.2025.104454","url":null,"abstract":"This paper investigates the mechanics of high-velocity fragmentation and spall fracture of steel AF9628. For this purpose, we have conducted an experimental campaign comprising 25 ring expansion tests and 36 planar plate impact experiments utilizing a single-stage light-gas gun, resulting in the largest and most comprehensive investigation to date on the dynamic fracture properties of AF9628. The ring expansion tests involve the axial impact of a conical-nosed cylindrical projectile on a stationary thin-walled tube, over which the specimen is inserted. The cross-section of the cylindrical part of the projectile exceeds the inner diameter of the tube, prompting expansion of the sample as the projectile advances, ultimately leading to the formation of multiple necks and fractures across the circumference of the ring. The experiments were documented using two high-speed cameras to capture time-resolved insights into the specimen’s deformation and fracture mechanisms. The video footage was synchronized with a photonic Doppler velocimetry system to measure the time evolution of the radial speed of the ring, thereby establishing a correlation between the nucleation of necks, the formation of fragments, and the actual strain rate in the specimens, which ranged from <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mo is=\"true\">≈</mo><mn is=\"true\">8000</mn><mspace width=\"0.33em\" is=\"true\" /><msup is=\"true\"><mrow is=\"true\"><mtext is=\"true\">s</mtext></mrow><mrow is=\"true\"><mo is=\"true\">−</mo><mn is=\"true\">1</mn></mrow></msup></mrow></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.317ex\" role=\"img\" style=\"vertical-align: -0.235ex;\" viewbox=\"0 -896.2 4787.2 997.6\" width=\"11.119ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMAIN-2248\"></use></g><g is=\"true\" transform=\"translate(1056,0)\"><use xlink:href=\"#MJMAIN-38\"></use><use x=\"500\" xlink:href=\"#MJMAIN-30\" y=\"0\"></use><use x=\"1001\" xlink:href=\"#MJMAIN-30\" y=\"0\"></use><use x=\"1501\" xlink:href=\"#MJMAIN-30\" y=\"0\"></use></g><g is=\"true\"></g><g is=\"true\" transform=\"translate(3388,0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMAIN-73\"></use></g></g><g is=\"true\" transform=\"translate(394,362)\"><g is=\"true\"><use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-2212\"></use></g><g is=\"true\" transform=\"translate(550,0)\"><use transform=\"scale(0.707)\" xlink:href=\"#MJMAIN-31\"></use></g></g></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow is=\"true\"><mo is=\"true\">≈</mo><mn is=\"true\">8000</mn><mspace is=\"true\" width=\"0.33","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"51 1","pages":""},"PeriodicalIF":9.8,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144899709","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":"Modeling the effects of slip, twinning, and notch on the deformation of single-crystal austenitic manganese steel","authors":"S. Virupakshi ,&nbsp;X. Zheng ,&nbsp;K. Frydrych ,&nbsp;I. Karaman ,&nbsp;A. Srivastava ,&nbsp;K. Kowalczyk-Gajewska","doi":"10.1016/j.ijplas.2025.104453","DOIUrl":"10.1016/j.ijplas.2025.104453","url":null,"abstract":"<div><div>The objective of this work is to deconvolute the interaction of slip, twinning, and notch on the deformation response of an austenitic manganese (Hadfield) steel using detailed finite element simulations. The simulations employ a rate-dependent crystal plasticity constitutive model that incorporates both slip and twinning deformation mechanisms. The model accounts for the spatially non-uniform appearance of new twin-related orientations, hardening due to slip–twin interactions, and modified properties of the twinned crystal. Limited experiments on single-crystal dog-bone and single-edge notch specimens, with two crystal orientations, are also conducted to aid the simulation. Several features of the experimental observations are accurately captured in the simulations. For example, simulations accurately capture distinct stress–strain responses associated with different crystallographic orientations, including variations in initial hardening behavior followed by either decreasing or increasing hardening depending on the dominant deformation mechanisms. The simulation also captures the observed orientation-dependent asymmetric deformation of the notch in single-edge notch specimens. Additionally, by selectively activating deformation mechanisms, the role of twinning is isolated and its influence on both global and local response is clearly demonstrated. These results provide a mechanistic understanding of how deformation mode interactions and local geometry (i.e., notch) influence the response of these materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104453"},"PeriodicalIF":12.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902419","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":"Uncovering two-step shear banding initiation in metallic glasses via complex network theory-based spatial structural parameters","authors":"Yu-Nuo Zhou ,&nbsp;Zeng-Yu Yang ,&nbsp;Hai-Ying Wang ,&nbsp;Lan-Hong Dai","doi":"10.1016/j.ijplas.2025.104456","DOIUrl":"10.1016/j.ijplas.2025.104456","url":null,"abstract":"<div><div>The structural origin of shear banding in metallic glasses remains elusive due to its inherent multi-scale complexity and nonlinearity. Although significant efforts have been made to characterize medium-range-order structures (MROs) formed by interconnected icosahedra, the spatial features of these structures and the atomic-level origin of shear banding are still ambiguous. In this study, two spatial parameters: “icosahedral packing tightness” and “structural integrity threshold”, are proposed based on complex network theory. These two parameters integrate local connections within neighboring icosahedra and their spatial distribution, quantitatively describing the structural evolution under interactions dominated by shear, dilatation, and rotation. A two-step structural softening mechanism for shear banding is revealed: first, the loose boundaries of icosahedral clusters are peeled by small-scale atomic behaviors, leaving densely packed cores that resist softening. Under increasing load, the dilatation expands until the general icosahedral arrangement within the stiff clusters becomes relaxed. The accumulated energy is subsequently released through the further enhancement of rotational softening of the whole rigid structure in a narrow band, leading to shear band formation. Our approach provides a comprehensive framework for characterizing structural features from short range to medium-to-long range in metallic glasses, offering new insights into the detailed origin of shear banding.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104456"},"PeriodicalIF":12.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907983","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 rate-dependent elastoplastic ordinary state-based peridynamic model for concrete under impact loading","authors":"Shuyu Wang ,&nbsp;Linjuan Wang ,&nbsp;Yunteng Wang ,&nbsp;Fengrui Liu ,&nbsp;Libin Zhao","doi":"10.1016/j.ijplas.2025.104427","DOIUrl":"10.1016/j.ijplas.2025.104427","url":null,"abstract":"<div><div>The complex deformation and fracture behaviors of concrete under impact loading, including tension–compression asymmetry, nonlinear equation of state, plasticity sensitivity, nonlocal effects, and discontinuous fracture, pose significant challenges to constitutive modeling and fracture simulation. Ordinary state-based peridynamics (OSB-PD) shows promise for addressing these challenges, with advantages in nonlocality, elimination of zero-energy modes, and dynamic fracture modeling. However, its advancement is hindered by two critical issues: the lack of a clear elastoplastic constitutive framework analogous to classical continuum mechanics, and the absence of OSB-PD models that simultaneously capture all these complex behaviors. This paper proposes such a framework, defining OSB-PD invariants, constitutive relations, and yield criteria with correspondences to classical counterparts. Based on this framework, a rate-dependent elastoplastic OSB-PD model for concrete is developed, incorporating key mechanical features under impact loading. The simulations results of the model are consistent with the experimental data from the three-point bending beam and SHPB tests, capturing the nail-like crack tip in bending tests and the double-peak phenomenon in SHPB tests. The proposed framework extends readily to other elastoplastic models and demonstrates significant potential for concurrent handling of material fracture and deformation under dynamic loading.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104427"},"PeriodicalIF":12.8,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144857904","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":"Achieving superior thermal stability in an Al-Mg-Mn-Sc alloy by suppressing Al3(Sc, Zr) phase aggregation subjected to cryogenic homogeneous deformation","authors":"Hao Gu ,&nbsp;Qun Yu ,&nbsp;Zhibao Xie ,&nbsp;Charlie Kong ,&nbsp;M.W. Fu ,&nbsp;Hailiang Yu","doi":"10.1016/j.ijplas.2025.104452","DOIUrl":"10.1016/j.ijplas.2025.104452","url":null,"abstract":"<div><div>Nanometer precipitates are essential for enhancing high specific strength in aluminum alloys, yet their coarsening at elevated temperatures causes severe property degradation. Recently, second-phase engineering for tailoring precipitate size and spatial distribution in the matrix has become a recent research hotspot. Here, we report that cryorolling (CR) refines and homogenizes Al₃(Sc,Zr) precipitates in an Al-Mg alloy containing scandium and zirconium, yielding exceptional thermal stability and mechanical performance. Crystal plasticity simulations were carried out for cryogenic and room-temperature deformation behaviors, which reveal that CR promotes a more coordinated strain distribution, accumulation of high-density dislocations under high stress and stress gradient, activation of hard-oriented slip systems, and coordinated operation of multiple slip systems, resulting in a more uniform deformation path than room-temperature rolling (RTR). The resulting precipitate refinement and uniform deformation minimize spatial clustering of Al₃(Sc,Zr), suppressing short-range diffusion of Sc and Zr and retarding the coarsening kinetics of Al₃(Sc,Zr). After annealing at 480 °C for 1 h, the average particle size of the Al₃(Sc,Zr) phase in the CR samples remained essentially unchanged. In contrast, the Al₃(Sc,Zr) phase in the RTR samples underwent significant coarsening, exhibiting an average particle size 71 % larger than that in the CR samples. Because Al₃(Sc,Zr) impedes grain-boundary migration and dislocation climb at elevated temperatures, the fine-grained microstructure and high dislocation density in the CR material are retained, leading to superior thermal stability during annealing. This study demonstrates a promising route for enhancing the thermal stability of high-strength aluminum alloys that is readily scalable to industrial production.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104452"},"PeriodicalIF":12.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851565","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":"Self-stabilized energy dissipation boundary during shear banding of amorphous solids","authors":"J.R. Deng ,&nbsp;C.F. Xu ,&nbsp;X.Q. Zhang ,&nbsp;M.Q. Jiang ,&nbsp;X.C. Tang ,&nbsp;X.H. Yao","doi":"10.1016/j.ijplas.2025.104440","DOIUrl":"10.1016/j.ijplas.2025.104440","url":null,"abstract":"<div><div>Amorphous alloys possess many desirable physical and mechanical characteristics, but their practical utility is constrained by catastrophic shear banding–a consequence of restricted energy dissipation governed by dual self-stabilized boundaries: (1) energy diffusion boundaries and (2) cluster cooperative motion boundaries. The restricted energy dissipation capacity stems from the finite thickness of shear bands, which defines a self-stabilized energy dissipation boundary during plastic deformation. This research confirmed the existence of characteristic shear band thickness and offered a novel perspective on the performance regulation of amorphous solids by revealing the self-organized stabilization of shear bands through experiments and simulations. Critically, the stabilization mechanism deviates from Stokes–Einstein predictions and follows an Arrhenius-type diffusion process, where the diffusion boundary at the shear band-matrix interface regulates free volume transport. The critical scale of shear band thickness is found to be the best strategy for minimizing energy. This discovery introduces a novel approach to optimize mechanical qualities in various application circumstances by altering material microstructures.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104440"},"PeriodicalIF":12.8,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144825335","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":"Unveiling the dislocation mechanism induced by irradiation defects in austenitic FeCrNi alloy","authors":"Qiaosheng Xia ,&nbsp;Dongpeng Hua ,&nbsp;Yeran Shi ,&nbsp;Qing Zhou ,&nbsp;Bida Zhu ,&nbsp;Xiaofei Yu ,&nbsp;Haifeng Wang ,&nbsp;Weimin Liu","doi":"10.1016/j.ijplas.2025.104451","DOIUrl":"10.1016/j.ijplas.2025.104451","url":null,"abstract":"<div><div>Understanding the interaction between irradiation defects and gliding dislocations is crucial for achieving strength-ductility synergy in irradiated nuclear structural materials for reactor safety and longevity. Here, we employ MD to investigate irradiation-induced defect formation and their interactions with gliding dislocations in a polycrystalline FeCrNi alloy during tensile deformation. Our findings reveal that stacking faults (SFs) were nucleated from the local stress concentration region on grain boundaries caused by absorbing point defects, and gradually transformed into twin with increasing irradiation dose. The density of sessile stair-rod loops, in contrast to the dynamic equilibrium observed for mobile Shockley loops, exhibits an increasing trend with higher irradiation doses and tends to aggregate into stacking fault tetrahedra (SFT) at the later stages of irradiation. During plastic deformation, in addition to the hindering effect inducing radiation hardening, it was also found that Shockley loop could facilitate double cross-slip of screw dislocations at adjacent crystal planes, which complicates dislocation motion and sustains ductility. Additionally, irradiation-induced voids can trigger dislocation renucleation through interacting with a pair of dislocations with opposite signs, leading to the transformation of SF into nanotwin, thus mitigating ductility loss. These mechanisms driven by 3D grain boundary network and random defect distributions offer novel insights into designing radiation-tolerant polycrystalline FeCrNi alloys for nuclear applications.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104451"},"PeriodicalIF":12.8,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144819507","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":"Strength and ductility synergy of SiC reinforced aluminum matrix composites through interface replacement strategy","authors":"Yanzhi Peng ,&nbsp;Min Song ,&nbsp;Caiju Li ,&nbsp;Zunyan Xu ,&nbsp;Li Fu ,&nbsp;Liyuan Liu ,&nbsp;Liang Liu ,&nbsp;Xiaofeng Chen ,&nbsp;Jianhong Yi ,&nbsp;Jürgen Eckert","doi":"10.1016/j.ijplas.2025.104450","DOIUrl":"10.1016/j.ijplas.2025.104450","url":null,"abstract":"<div><div>Introducing intragranular reinforcements plays an important role in improving the strength and ductility of composites. However, it is still a challenge to regulate the distribution of reinforcements in Al matrix composites. In the present work, the surface of nano-SiC_p coated by a thin layer of amorphous SiO₂ was realized through oxidation treatment to achieve interfacial replacement, which reduces the binding force between the particles by two orders of magnitude. This strategy realizes a uniform dispersion of the nanoparticles in the matrix. The results show that more than 60 % of the oxidized SiC particles (SiC_op) are distributed inside the grains, while the amount of the raw SiC_p without oxidation is only 35 %. The presence of an inter-diffusion amorphous interlayer improves the interface bonding between SiC_op and the aluminum matrix. Due to this unique structure design, the SiC_op/Al-11Si composites exhibit a simultaneous increase in strength and ductility. The yield strength, ultimate tensile strength and elongation to failure of 9 wt. % SiC_op/Al-11Si are 273.4 ± 4.6 MPa, 400.8 ± 6.9 MPa and 6.8 ± 0.4 %, respectively. Altogether, this study provides a simple and feasible method for fabricating strong and ductile SiC_p/Al matrix composites, and provides a conceptual framework for designing other ceramic particle-reinforced metal matrix composites.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104450"},"PeriodicalIF":12.8,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144802832","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 computational model for simulating thermo-elasto-plastic failures using non-localizing and localizing gradient damage","authors":"Sandipan Baruah,&nbsp;Indra Vir Singh","doi":"10.1016/j.ijplas.2025.104442","DOIUrl":"10.1016/j.ijplas.2025.104442","url":null,"abstract":"<div><div>The conventional strategy for simulating thermo-mechanical failures using localizing gradient damage is based on an elastic material-model. It does not incorporate the physics of plastically-driven failures under combined thermal and mechanical loads. Moreover, the conventional formulation neglects the effect of damage on heat-capacity and avoids certain essential physics-based couplings among the deformations, damage and temperature. Therefore, in this work, a novel computational framework based on non-localizing and localizing gradient damage is developed for simulating thermo-elasto-plastic failure of materials, under the influences of both mechanical and thermal loads. The present strategy is derived from the law of thermodynamic power-balance and the free-energy density function. Unlike previous works, the present framework considers the effect of damage-based degradation on both thermal conductivity and heat-capacity. A new set of constitutive relations for thermo-elasto-plastic damage are developed in incremental form to incorporate the stress fields, local and non-local equivalent plastic strains, damage and temperature. Using these constitutive equations, new formulations of coupled-stiffness matrices and heat-capacity matrices are derived in the context of gradient damage. The cross-influences of damage, temperature and deformation on each other are incorporated through these matrices. The capability of the present framework is demonstrated by solving several examples on thermo-elasto-plastic ductile failures using finite element approach.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104442"},"PeriodicalIF":12.8,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144797126","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":"Anisotropic yield loci and inverse Swift effect in extruded AZ31 Mg alloy under multi–degree-of-freedom torsional–axial non-proportional loading paths","authors":"Mingyang Jiao ,&nbsp;Zhijia Liu ,&nbsp;Jing Tan ,&nbsp;Yang Li ,&nbsp;Yan Peng ,&nbsp;Ruihong Li ,&nbsp;Chuanpu Liu ,&nbsp;Baodong Shi ,&nbsp;Xianhua Chen ,&nbsp;Fusheng Pan","doi":"10.1016/j.ijplas.2025.104439","DOIUrl":"10.1016/j.ijplas.2025.104439","url":null,"abstract":"<div><div>The deformation mechanisms of Mg alloy under multi<strong>–</strong>degree-of-freedom axial, torsional, and combined loadings remains critically unclear. This is particularly significant in the case of the anisotropic evolution of yield loci and inverse Swift effect, which are crucial for optimizing the forming technologies for engineering parts. In order to clarify the underlying deformation mechanisms, combined multi–degree-of-freedom axial–torsional non-proportional loading paths are specially designed. The anisotropic evolution of the yield loci and Swift–inverse Swift effects in extruded AZ31 Mg alloys are investigated. The strong loading-path–dependent twinning activities and underlying deformation mechanisms are clarified in detail. The findings reveal that the inverse Swift effect during free rotational tension (FR_Ten) is attributed to the residual shear stress and initial texture heterogeneity, while the spontaneous macroscopic rotation during free rotational compression (FR_Com) is found to originate from the heterogeneous local strain induced by the interactions of the <span><math><mrow><mo>{</mo><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>2</mn><mo>}</mo></mrow></math></span> twins. Free end torsion (FE_Tor) pre-straining induces subsequent yield locus (SYL) rotation towards the positive τ axis and expansion along the negative σ axis. The anisotropic Swift–inverse Swift effects are accurately captured by the plastic strain-components on the yield loci. Tensile twinning and basal slip coordinate the plastic deformation under FR_Com-dominated loading paths, owing to the low twin favourability, and the relative activities of non-basal slips under FR_Ten-dominated loading paths are significantly improved. The evolutions of the Swift–inverse Swift effects are determined by elastic pre-loadings, resulting in loading–path-dependent anisotropic evolutions of mechanical responses.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"193 ","pages":"Article 104439"},"PeriodicalIF":12.8,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144792291","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}