International Journal of Plasticity最新文献

{"title":"Lüders band-assisted high uniform ductility in ultrastrong ferrous medium-entropy alloy via hierarchical microstructure","authors":"Hyeonseok Kwon ,&nbsp;Jae Heung Lee ,&nbsp;Alireza Zargaran ,&nbsp;Stefanus Harjo ,&nbsp;Wu Gong ,&nbsp;Jaemin Wang ,&nbsp;Gang Hee Gu ,&nbsp;Byeong-Joo Lee ,&nbsp;Jae Wung Bae ,&nbsp;Hyoung Seop Kim","doi":"10.1016/j.ijplas.2025.104378","DOIUrl":"10.1016/j.ijplas.2025.104378","url":null,"abstract":"<div><div>In this work, we harness a hierarchical microstructure to tailor both the strengthening and deformation mechanisms of Co₂₁Cr_12.5Fe₅₅Ni₄Mo_7.5 (at %) ferrous medium-entropy alloy (MEA) simultaneously. A simple thermomechanical processing (cold rolling and 90 s of annealing) creates a hierarchical microstructure composed of ultrafine recrystallized grains, non-recrystallized grains with rolling-driven substructures, and intragranular nanoprecipitates. The hierarchical microstructure with the high density of dislocations and ultrafine recrystallized grains leads to a high yield strength of ∼1.60 GPa, but it is well-known that the same features can make materials vulnerable to premature fracture. To solve this issue, Lüders deformation, which was induced by the ultrafine grain boundaries and stress-induced martensitic transformation facilitated by pre-existing martensite nucleation sites, was harnessed: stable propagation of the Lüders band delays massive strain hardening by regulating strain-induced martensitic deformation that ensues and enables a large uniform ductility. Resultantly, tensile strength of ∼1.84 GPa and uniform elongation of ∼20 % are achieved, on par with the finest tensile properties among multi-principal element alloys ever reported. Our results point to a paradigm to achieve a large uniform ductility via harnessing the Lüders deformation without compromising strength, based on the hierarchical microstructure.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104378"},"PeriodicalIF":9.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145705","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":"Grain-scale micromechanical behaviors of hexagonal titanium utilizing in-situ high-energy diffraction microscopy and crystal plasticity finite element simulations","authors":"Yiping Xia ,&nbsp;Yuhang Wang ,&nbsp;He Wu ,&nbsp;Yiming Yang ,&nbsp;Xinbo Ni ,&nbsp;Kesong Miao ,&nbsp;Xuewen Li ,&nbsp;Guohua Fan","doi":"10.1016/j.ijplas.2025.104370","DOIUrl":"10.1016/j.ijplas.2025.104370","url":null,"abstract":"<div><div>Coupling crystal plasticity finite element (CPFE) simulations with in-situ characterization techniques offers a robust framework for exploring the micromechanical behavior of polycrystalline metals. In this study, we tracked the evolution of the complete elastic strain tensor and orientation rotation of hundreds of grains in a hexagonal titanium (Ti) sample under uniaxial tension using in-situ high-energy diffraction microscopy (HEDM). These experimental observations were systematically compared to CPFE simulations instantiated with experimentally characterized results. It was found that CPFE simulations successfully replicate the macroscopic stress-strain response and texture evolution of polycrystalline Ti, however, only partially capture grain-scale micromechanical behaviors, particularly regarding grain-resolved elastic strains and orientation rotations. Detailed grain-to-grain comparison metrics reveal that incorporating residual stresses into CPFE models significantly improves the predictive accuracy of micromechanical behaviors. Moreover, simulations involving pyramidal &lt;a&gt; slip systems with high critical resolved shear stress, show slightly enhanced predictive performance. Further analyses of individual grains showcase how residual stresses and slip systems selections influence the micromechanical behaviors, highlighting the importance of the grain-scale stress state in determining deformation mechanisms. To understand the role of strain gradient effects in grain-scale stress heterogeneity, a non-local dislocation-based CPFE model was further compared to the phenomenological model discussed above. Although pronounced localized stresses and altered deformation mechanisms were observed near grain boundaries, the dislocation-based CPFE model still cannot significantly improve the predictions of grain-scale micromechanical behaviors. This work deepens the fundamental understanding of deformation mechanisms in hexagonal metals, and offers valuable insights into micromechanical modeling of polycrystalline materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104370"},"PeriodicalIF":9.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148071","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":"Enhancement of mechanical properties in AZ91D magnesium alloy via wire arc additive manufacturing: influence of rapid solidification and solute segregation on microstructure and deformation behavior","authors":"Weizong Bao ,&nbsp;Bingnan Qian ,&nbsp;Huaqing Yi ,&nbsp;Sihao Zou ,&nbsp;Ziqi Mei ,&nbsp;Changmeng Liu ,&nbsp;Binbin He ,&nbsp;Yueling Guo ,&nbsp;Wenjun Lu","doi":"10.1016/j.ijplas.2025.104376","DOIUrl":"10.1016/j.ijplas.2025.104376","url":null,"abstract":"<div><div>The short-process fabrication of high-performance magnesium alloys holds great promise for aerospace and automotive applications, driving advancements in high-end manufacturing. In this study, tungsten inert gas (TIG)-protected wire arc additive manufacturing (WAAM) was employed to produce AZ91D Mg alloy with a weakly textured, equiaxed grain structure. The resulting alloy exhibits an ultimate tensile strength of 284 MPa and uniform elongation of 12.5 %, facilitated by enhanced work hardening. Optimized solidification conditions \"freeze\" solute atoms in a supersaturated state, inhibiting diffusion and precipitation, and result in a heterogeneous solute distribution. The elevated Al solute concentration suppresses twin propagation, leading to the formation of refined twin lamellae. The ensuing interactions between these fine twins and dislocations play a pivotal role in enhancing the work hardening capability. Additionally, the gradient distribution of Al solute atoms, together with the grain boundary segregation of Al/Zn, effectively weakens the texture, thereby preserving the mechanical isotropy of the WAAM-AZ91D alloy. Additionally, a gradient distribution of solid solution Al atoms extending from grain boundaries to the interior establishes a hardness gradient, effectively alleviating stress concentrations at grain boundaries during deformation and enabling uniform plastic deformation of WAAM-AZ91D. This work expands the application of post-treatment-free short-process fabrication techniques as an effective strategy for the rapid production of high-performance magnesium alloys, broadening their application scope.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104376"},"PeriodicalIF":9.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137073","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":"Developing and validating a fully coupled model of non-local crystal plasticity and probabilistic cellular automata for dynamic recrystallization simulation","authors":"Xingyun Yang ,&nbsp;Daming Tong ,&nbsp;Miao Gong ,&nbsp;Zhenghong Guo ,&nbsp;Chuanwei Li ,&nbsp;Jianfeng Gu","doi":"10.1016/j.ijplas.2025.104375","DOIUrl":"10.1016/j.ijplas.2025.104375","url":null,"abstract":"<div><div>This study presents a fully integrated model combing non-local crystal plasticity finite element method (CPFEM) and probabilistic cellular automata (CA) to capture the coupled effect of heterogeneous deformation, morphological evolution and mechanical responses during dynamic recrystallization (DRX). The developed model incorporates a non-local methodology that accounts for geometrically necessary dislocations (GND) and a probabilistic CA model that describes DRX microstructural evolution, both of which are integrated into CPFEM formulations that handle multiscale heterogeneous deformation. Based on the periodic polycrystalline grids serving as both finite elements and CA cells, the non-uniform distribution of mechanical responses at grain-level, including two types of dislocation densities is calculated through CPFEM. The microstructural evolution of DRX, synchronized with deformation, is predicted through CA model with probabilistic switching rules. The DRX induced changes in dislocation densities and crystallographic orientation are then fed back into CPFEM to determine the subsequent mechanical response and plastic deformation. The proposed model is validated against experimental data for SA508–3 steel during hot compression bonding (HCB) process. It’s demonstrated that the proposed model effectively integrates predictions of macroscale mechanical response, mesoscale dislocation density distribution, and microscale microstructural evolution during DRX. Furthermore, the model can be extended to other problems by adapting corresponding CA switching rules.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104375"},"PeriodicalIF":9.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137074","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":"Promoting strength-ductility synergy through sequential martensitic transformation in a hierarchical heterostructured eutectic high-entropy alloy","authors":"Haoxiang Liu ,&nbsp;Yixuan He ,&nbsp;Mingyang Li ,&nbsp;Yuhao Wu ,&nbsp;Shaolong Li ,&nbsp;Xudong Liu ,&nbsp;Huihui Zhi ,&nbsp;Haifeng Wang","doi":"10.1016/j.ijplas.2025.104374","DOIUrl":"10.1016/j.ijplas.2025.104374","url":null,"abstract":"<div><div>The transformation-induced plasticity (TRIP) effect presents a promising approach to overcome the strength-ductility dilemma in eutectic high-entropy alloys (EHEAs). However, interface instability during phase transformation often leads to reduced ductility due to interfacial cracking. Here, we develop a hierarchical heterostructure EHEA comprising alternating lamellar and equiaxed regions that achieves an exceptional strength-ductility synergy, demonstrating an ultimate tensile strength of 1.56 GPa coupled with 20.7% uniform elongation. The sustained and effective work-hardening behavior of the alloy stems from a sequential martensitic transformation process across different regions, where the transformation kinetics are precisely controlled through B2 phase stability and stress partitioning between regions. Additionally, the formation of a stacking fault network in FCC phases further enhances work-hardening capacity. Notably, exceptionally hetero-deformation induced (HDI) strengthening arises from the multi-scale strain partitioning across different regions and among various phases within the unique hierarchical heterogeneous structure. This study opens a new avenue for designing advanced TRIP-assisted high-performance EHEAs by introducing a hierarchical heterostructure to tailor the kinetics of martensitic transformation.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104374"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113358","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":"Multiscale chemical ordering heterogeneity facilitates exceptional strength and ductility in additively manufactured Ti-added AlCoCrFeNi2.1 high-entropy alloys at intermediate temperatures","authors":"Yixuan Sun ,&nbsp;Chunjin Wang ,&nbsp;Chuanxi Ren ,&nbsp;Dongdong Zhang ,&nbsp;Kangsen Li ,&nbsp;Chi Fai Cheung ,&nbsp;Zibin Chen","doi":"10.1016/j.ijplas.2025.104373","DOIUrl":"10.1016/j.ijplas.2025.104373","url":null,"abstract":"<div><div>The remarkable mechanical properties of high-entropy alloys at room and cryogenic temperatures have garnered significant attention in recent years. However, their poor mechanical performance at intermediate temperatures has hindered their practical application in many contexts. This study examines the effect of Ti addition on the intermediate-temperature tensile properties of additively manufactured AlCoCrFeNi₂.₁ eutectic high-entropy alloys. The findings demonstrate that Ti addition improves the alloy's tensile properties through several vital mechanisms. Ti addition significantly increases back-stress, which dominates strain-hardening behavior. At 400 °C, Ti addition promotes the formation of chemically long-range ordered and spinodal decomposition, facilitating multi-mode dislocation behavior characterized by coexisting planar and wavy slip. This enhances work-hardening, thereby achieving improved strength-ductility synergy. At 600 °C, the long-range ordered and spinodal decomposition evolved into nanoscale D0₃ precipitates that allow dislocation pinning and contribute to high strength while preserving good ductility. Moreover, Ti addition induces a rounded dual-phase microstructure, where the face-centered cubic phase serves as an adhesive layer, preventing crack propagation along the phase boundary. These mechanisms synergistically enhance strength and ductility at intermediate temperatures, making Ti-modified AlCoCrFeNi₂.₁ high-entropy alloys highly suitable for applications in the 400–600 °C temperature range.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104373"},"PeriodicalIF":9.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113359","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":"Breaking the strength-ductility trade-off in metastable β21s alloy via high silicon content and heterogeneous lamellar architecture","authors":"Hao Ding ,&nbsp;Xiping Cui ,&nbsp;Xiuwen Ren ,&nbsp;Jiamu Liu ,&nbsp;Zhiqi Wang ,&nbsp;Yuanyuan Zhang ,&nbsp;Naonao Gao ,&nbsp;Yihong He ,&nbsp;Wei Ye ,&nbsp;Kanghe Jiang ,&nbsp;Mao Liu ,&nbsp;Rui Zhang ,&nbsp;Xiangxin Zhai ,&nbsp;Junfeng Chen ,&nbsp;Lin Geng ,&nbsp;Lujun Huang","doi":"10.1016/j.ijplas.2025.104369","DOIUrl":"10.1016/j.ijplas.2025.104369","url":null,"abstract":"<div><div>The metastable β21S titanium alloy faces significant challenges in practical applications due to its insufficient yield strength and restricted uniform elongation. While silicon addition has proven effective in enhancing mechanical properties of titanium alloys, conventional wisdom restricts Si content to ≤0.5 wt.% to avoid embrittlement from coarse silicide formation. This study challenges this paradigm through innovative alloy design, incorporating 0.9 wt.% Si combined with isothermal treatment and hot extrusion to create a heterogeneous lamellar structured (HLS) β21S-Si alloy. Our approach achieves dual microstructural control: isothermal pretreatment induces ∼10 nm nanowire silicide precursors that refine final precipitates to 230 nm (from 700 nm in conventional processing), while subsequent extrusion disrupts continuous grain boundary silicides and constructs a well-defined heterogeneous lamellar architecture comprising recrystallized and substructured lamellae. The optimized HLS β21S-Si exhibits remarkable mechanical performance, demonstrating a 1035 MPa yield strength (10% enhancement) and 12% uniform elongation (8 × improvement) compared to baseline β21S. Multiscale characterization combining SEM-DIC and first-principles calculations reveals a unique sequential work-hardening mechanism: heterogeneous deformation-induced (HDI) hardening dominates early stages, followed by silicon-promoted cross-slip activity, culminating in stress-induced ω phase transformation during advanced deformation. This synergistic interplay of microstructure-engineered deformation mechanisms establishes a new pathway for overcoming the persistent strength-ductility trade-off in metastable β-Ti alloys, with significant implications for aerospace applications demanding high-performance structural materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104369"},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098965","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":"Enhanced Strain Gradient Crystal Plasticity theory: Evolution of the length scale during deformation","authors":"Amirhossein Lame Jouybari ,&nbsp;Samir El Shawish ,&nbsp;Leon Cizelj","doi":"10.1016/j.ijplas.2025.104351","DOIUrl":"10.1016/j.ijplas.2025.104351","url":null,"abstract":"<div><div>An Enhanced Strain Gradient Crystal Plasticity (Enhanced-SGCP) theory, based on the quadratic energy contribution of the Nye tensor, is developed within a thermodynamically consistent framework to accurately capture shear band formation in terms of slip and kink bands within the microstructure. The higher-order modulus in the theory is intrinsically linked to the evolving microstructural properties during applied loading, introducing a physical length scale that governs shear band formation and evolution. It is demonstrated that the Classical-SGCP model (a Gurtin-type nonlocal theory) leads to an increasing width of localization bands, which eventually disappear, resulting in homogeneous deformation within the microstructure. This effect arises from the excessive annihilation of geometrically necessary dislocations, which suppresses localization and may lead to physically meaningless results in the formation of shear bands. To address this issue, the proposed Enhanced-SGCP theory effectively preserves the shear band width and maintains localization throughout the loading process by reducing the higher-order modulus associated with the sweeping away of hardening defects and local softening mechanism. Furthermore, the theory establishes a direct link between lattice curvature in kink bands and the Nye tensor, demonstrating that the kink bands transform into slip bands. Consequently, the Enhanced-SGCP theory breaks the equivalence between slip and kink bands, providing a more accurate physical representation of strain localization mechanisms in irradiated materials.</div><div>To computationally solve the governing balance equations, a fixed-point algorithm based on the fast Fourier Transform (FFT) method is developed. To validate the algorithm, an analytical solution for the Enhanced-SGCP theory is derived. High-resolution single-crystal simulations confirm that the kink bands transition into regularized slip bands through different physical length scales within the proposed Enhanced-SGCP framework. Furthermore, high-resolution simulations are performed on two-dimensional and three-dimensional polycrystalline aggregates, considering different length scales and various higher-order interface conditions at the grain boundaries. The results reveal that the strain gradient effects during applied loading are saturated and stabilized by the Enhanced-SGCP theory, ensuring sustained localization.</div><div>These findings highlight the capability of the proposed Enhanced-SGCP theory and the developed FFT-algorithm to provide a robust and physically consistent framework for modeling strain localization in crystalline materials. The proposed model offers significant improvements over classical approaches, particularly in preserving localization phenomena and accurately describing the interplay between slip and kink bands.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104351"},"PeriodicalIF":9.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088211","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":"Tensile plasticity in amorphous microwires: The role of ion irradiation-induced gradient rejuvenation","authors":"Shuang Su ,&nbsp;Myeong Jun Lee ,&nbsp;Wook Ha Ryu ,&nbsp;Bo Huang ,&nbsp;Zhiliang Ning ,&nbsp;Yongjiang Huang ,&nbsp;Wanxia Huang ,&nbsp;Qingxi Yuan ,&nbsp;Jianfei Sun ,&nbsp;Daniel Sopu ,&nbsp;Eun Soo Park","doi":"10.1016/j.ijplas.2025.104371","DOIUrl":"10.1016/j.ijplas.2025.104371","url":null,"abstract":"<div><div>Amorphous alloys possess exceptional mechanical properties such as high strength and elasticity but suffer from limited tensile plasticity at room temperature, categorizing them as quasi-brittle materials. Ion irradiation has emerged as a promising method for improving their plasticity by inducing gradient rejuvenation structures that modify the distribution of free volume. In this study, H⁺ irradiation was applied to amorphous microwires (AMs), introducing a nonlinear gradient rejuvenation structure with thickness of ∼1.76 μm, which features a free volume distribution that first increases to a certain depth and then decreases from the surface to the interior. It not only effectively hinders the propagation of the dominant shear band (SB) at the interface between high and low free volume regions but also promotes the formation and branching of numerous fine SBs within the rejuvenated region. The combination of these two effects results in significant enhancement of the tensile plasticity to ∼ 2.97 % while maintaining high yield strength (1680 MPa) of AMs. This outcome provides insights into the mechanisms enabling improved plasticity and highlights the potential of nonlinear gradient rejuvenation as a strategy to optimize the mechanical properties of bulk amorphous alloys, offering a promising pathway for developing next-generation high-performance metallic materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104371"},"PeriodicalIF":9.4,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088061","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 phase-field crystal plasticity modelling of fracture in nickel-based superalloy","authors":"Qiangang Xu ,&nbsp;Kai Pan ,&nbsp;Yonghui Chen ,&nbsp;Zhen Zhang","doi":"10.1016/j.ijplas.2025.104368","DOIUrl":"10.1016/j.ijplas.2025.104368","url":null,"abstract":"<div><div>Accurately predicting anisotropic damage evolution in crystalline metals remains a challenging topic due to the multiscale nature of fracture. Microstructures play a critical role in influencing crack deflection at the macroscale. To study the relations among anisotropic deformation, crack initiation and propagation, an anisotropic phase-field crystal plasticity model has been developed for nickel-based superalloys. This model differs from conventional approaches in formulating the critical energy release rate as a function of preferentially activated slip or cleavage planes, rather than merely considering it as an isotropic quantity. This development not only allows effective representation of crack initiation due to local anisotropy introduced by slip activation, but also enables a more accurate representation of crystallography-dependent fracture behavior.</div><div>The performance of proposed method will be demonstrated to characterize crack initiation and propagation in nickel-based single-crystal and polycrystal superalloys. The proposed anisotropic phase field method has been found to be consistent with generalized maximum energy release rate criterion. The findings highlight the significant influence of crystallographic orientation on the crack formation in single crystals. Increased geometrically-necessary dislocation (GND) density has been observed along the activated slip directions, particularly for those near the crack tip. The model capability has also been exhibited in characterizing crack deflection within polycrystalline microstructures. The model is further verified against available experiments reported in recent literatures, by virtue of simultaneously comparing the stress-strain response and crack growth.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"190 ","pages":"Article 104368"},"PeriodicalIF":9.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066020","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}