International Journal of Plasticity最新文献

{"title":"Unveiling the effect of cementite distribution on the deformation behavior of pearlitic steel wires under micropillar compression: A strain-gradient crystal plasticity approach","authors":"Abhishek Kumar Singh ,&nbsp;Ki-Seong Park ,&nbsp;Saurabh Pawar ,&nbsp;Dahye Shin ,&nbsp;Dongchan Jang ,&nbsp;Shi-Hoon Choi","doi":"10.1016/j.ijplas.2024.104214","DOIUrl":"10.1016/j.ijplas.2024.104214","url":null,"abstract":"<div><div>This study examines the deformation mechanisms in cold-drawn pearlitic steel wires using micropillar compression tests. Scanning electron microscopy (SEM) identified five distinct regions characterized by varying cementite distributions, and nanoindentation tests were subsequently performed in these areas. Additionally, five micropillars were fabricated within these regions using focused ion beam (FIB) techniques. The micropillar compression results reveal a pronounced correlation between the mechanical behavior of micropillars and various microstructural parameters, including the cementite inclination angle (CIA), interlamellar spacing, and ferrite-cementite distribution. Furthermore, strain gradient crystal plasticity finite element analysis (SG-CPFEM) revealed a significant increase in geometrically necessary dislocations (GNDs) at the ferrite-cementite interfaces, which critically influences the effective slip resistance. The simulations also indicated that the presence of a ferrite-cementite interface significantly elevates GND concentrations, impacting the load-displacement behavior. Micropillars with cementite normal to the loading direction showed higher increases in GNDs, while reduced cementite spacings were found to amplify GND formation due to increased strain gradients in the ferrite phase. A shear fracture were predominant in pillars with CIA of 67.5º or higher, while kink band formations were observed in pillars with CIA of 22.5º or lower. The increase in GNDs is influenced by both the CIA and interlamellar spacing, highlighting their critical roles in determining mechanical properties.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104214"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841238","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":"Novel distortional anisotropic hardening model mediated by microstructure evolutions in polycrystalline metals: Theory and validation","authors":"Seonghwan Choi ,&nbsp;Soo-Chang Kang ,&nbsp;Jinwoo Lee ,&nbsp;Myoung-Gyu Lee","doi":"10.1016/j.ijplas.2024.104227","DOIUrl":"10.1016/j.ijplas.2024.104227","url":null,"abstract":"<div><div>In this study, we introduce a novel anisotropic hardening model designed to capture the macroscopic mechanical responses under complex loading paths while considering the mesoscopic evolutions of crystallographic structures. Based on the framework of homogeneous distortional anisotropic hardening, this model treats the plastic shear strain of each slip system as an internal variable. Utilizing the plastic work equivalence principle, the plastic shear rate within the slip system is determined, aligning with the evolution laws of rate-independent crystal plasticity (CP) theory. The model evaluates the Bauschinger effect and transient hardening at grain level and integrates it into the macroscopic yield function to describe phenomenological hardening responses. The model has been extensively validated against experimental and computational polycrystalline CP approaches, demonstrating its efficacy in capturing both the evolution of crystal textures and complex anisotropic hardening behaviors for both FCC and BCC materials. This proposed hardening model marks a significant advancement in material behavior modeling, effectively bridging the gap between microstructural mechanisms and macroscopic mechanical behavior in better practical way.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104227"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887790","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":"Understanding the stress-induced grain boundary migration behavior in a deformed Mg alloy: The role of deformation twin and grain rotation","authors":"Zijian Zhang ,&nbsp;Lin Yuan ,&nbsp;Jiaping Ma ,&nbsp;Mingyi Zheng ,&nbsp;Debin Shan ,&nbsp;Bin Guo","doi":"10.1016/j.ijplas.2025.104244","DOIUrl":"10.1016/j.ijplas.2025.104244","url":null,"abstract":"<div><div>Stress-induced grain boundary (GB) migration plays a crucial role in plastic deformation, influencing the microstructure and mechanical properties of polycrystalline materials. While twinning and grain rotation are important deformation modes, their impact on the GB migration of Mg alloys remains unclear. This work builds the internal relationship between deformation twins, grain rotation, and stress-induced GB migration in a deformed Mg alloy by experiments and simulations. During the uniaxial compression experiment, the GB migration mainly occurs during the <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow><mo>}</mo></mrow></math></span>tension twin thickening. Atomic simulations reveal that twin thickening results from the slip of interface dislocations along the basal plane (0001) under shear stress. When interface dislocations of twins are hindered by the GB, local stress concentrations lead to GB migration. A new factor <em>I</em>, derived from experimental results, serves as a criterion to differentiate migrated from non-migrated regions during twin thickening at the mesoscale. Grain rotation accompanied by GB migration occurs under mesoscale observations. The scalar disclinations density increases at the GB junctions due to rotation and the disclinations move with the GB migration. Local rotation associated with the formation of low-angle GBs accelerates local migration and contributes to GB serration. Crystal plasticity finite element simulations show that the additional shear stress caused by grain rotation promotes GB migration. Our findings help to understand the GB migration mechanisms of Mg alloys related to the application of Mg alloys through GB engineering.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104244"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937615","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":"Strategic enhancement of CoCrFeMnNi high-entropy alloy mechanical properties through a high-strength nano-scale nitride layer without geometrical or tolerance constraints","authors":"Gang Hee Gu ,&nbsp;Shin Hyun Kim ,&nbsp;Sung-Gyu Heo ,&nbsp;Yongju Kim ,&nbsp;Soo-Hyun Kim ,&nbsp;Hyeonseok Kwon ,&nbsp;Donghwa Lee ,&nbsp;Goo-Hwan Jeong ,&nbsp;Yoon-Uk Heo ,&nbsp;Dong Jun Lee ,&nbsp;Hyoung Seop Kim","doi":"10.1016/j.ijplas.2024.104235","DOIUrl":"10.1016/j.ijplas.2024.104235","url":null,"abstract":"<div><div>Plasma nitriding is a class of surface treatment method that improves wear, corrosion, and fatigue properties along with the benefits of excellent geometry freedom and minimal dimensional distortion. Yet, previous plasma nitriding studies related to tensile properties have mostly compromised strength or ductility mainly due to grain growth or the brittle nature of bulky micrometer-scale nitride layer. We propose a strategy to simultaneously improve mutually exclusive strength and elongation through a high-strength nano-scale nitride layer fabricated via plasma nitriding, overcoming the typical trade-off relationship; for example, ultimate tensile strength and uniform elongation were improved by ∼74.6 MPa and ∼7.9 %, respectively. Using extraordinarily controlled processing parameters (e.g., low-pressure, short-time, warm-temperature), we successfully produced CoCrFeMnNi HEA with a nano-scale nitride layer of ∼291.9 nm near the surface without any change in grain size. The enhanced mechanical properties of the plasma nitrided CoCrFeMnNi HEA are attributed to the combined effects of pre-existing dislocation density, high-strength nano-scale nitride layer, and compressive residual stress. This work introduces an innovative approach to nano-scale hard regions, providing a novel framework for post-processing strategies ranging from fundamental research to various industrial applications.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104235"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142901825","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":"Advancing material simulations: Physics-Informed Neural Networks and Object-Oriented Crystal Plasticity Finite Element Methods","authors":"Shahriyar Keshavarz ,&nbsp;Yuwei Mao ,&nbsp;Andrew C.E. Reid ,&nbsp;Ankit Agrawal","doi":"10.1016/j.ijplas.2024.104221","DOIUrl":"10.1016/j.ijplas.2024.104221","url":null,"abstract":"<div><div>An innovative method for predicting the behavior of crystalline materials is presented by integrating Physics-Informed Neural Networks (PINNs) with an object-oriented Crystal Plasticity Finite Element (CPFE) code within a large deformation framework. The CPFE platform is utilized to generate reference data for training the PINNs, ensuring precise and fast predictions of material responses. The object-oriented design of the CPFE system facilitates the coherent incorporation of complex constitutive models and numerical methods, enhancing simulation flexibility and scalability. To demonstrate the adaptability of this approach, two problems are addressed: a fundamental power-law and a complex dislocation density-based constitutive models for predicting the behavior of <span><math><mrow><msub><mrow><mtext>Ni</mtext></mrow><mrow><mn>3</mn></mrow></msub><mtext>Al</mtext></mrow></math></span>-based alloys. Both models are implemented within an object-oriented CPFE system powered by its flexible plug-in architecture. The resulting PINN model accurately captures intricate deformation mechanisms in crystalline materials, as validated through comparisons with CPFE simulations and experimental data. This work offers a promising alternative for efficient and accurate material behavior prediction, paving the way for advanced simulations in materials science.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104221"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142908449","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":"Enhancing the strain-hardening rate and uniform tensile ductility of lightweight refractory high-entropy alloys by tailoring multi-scale heterostructure strategy","authors":"Yansong Zhang,&nbsp;Huaming Wang,&nbsp;Junwei Yang,&nbsp;Yanyan Zhu,&nbsp;Jia Li,&nbsp;Zhuo Li,&nbsp;Bing Su,&nbsp;Bingsen Liu,&nbsp;Chunjie Shen","doi":"10.1016/j.ijplas.2024.104237","DOIUrl":"10.1016/j.ijplas.2024.104237","url":null,"abstract":"<div><div>During the deformation of body-centered cubic (BCC) structured lightweight refractory high-entropy alloys (LRHEAs), strain localization caused by a low strain-hardening rate (SHR) induces premature alloy necking, resulting in poor uniform tensile ductility (UTD) and restricts their processability and applicability. In this study, we improved the SHR of the alloys from negative to 1.5 GPa by tailoring multi-scale heterostructures, including the microscopic bimodal grain distribution, submicron spherical C14 Laves phase, nanoscale local chemical fluctuations (LCFs), and atomic clusters less than 1nm. The strength of the alloy was raised by 13.8 %, and the UTD increased by 710 % compared with the initial homogenized sample, and overall performance was superior to most LRHEAs. Bimodal grain interfaces can effectively coordinate the strain distribution between the two during deformation, accelerating the generation and storage of geometrically necessary dislocations (GNDs), and the back stress accumulates and increases with strain, stabilizing the hardening ability. Meanwhile, the meticulously dispersed C14 Laves phase plays a role in precipitation strengthening without compromising plasticity. The matrix's LCFs and Al-Zr atomic clusters can further regulate the morphology and distribution of statistically stored dislocations (SSDs). On the one hand, they could effectively pin dislocations and cause them to bend, increasing the migration resistance of SSDs; on the other hand, dislocation tangles resulting from microbands blocking and the interaction of multi-slip systems activate new dislocation sources, which lead to the rapid expansion of secondary microbands in a reticular manner. Those significantly increase the synchronous dislocation multiplication rate and dynamic dislocation density during plastic deformation, maintaining high and sustained SHR of alloys. Therefore, the SHR of LRHEA can be effectively improved by introducing multi-scale heterogeneous structures to optimize the coordination of GND and SSD density and distribution, thus achieving an excellent match between strength and UTD.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104237"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925143","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":"Influences of dislocation configuration and texture optimization on obtaining exceptional cryogenic strength-ductility synergy in a dynamic-recovered heterogeneous high-manganese steel","authors":"Hao Xiong ,&nbsp;Yu Li ,&nbsp;Chun Xu ,&nbsp;Wei Li ,&nbsp;Xiaoshuai Jia","doi":"10.1016/j.ijplas.2024.104225","DOIUrl":"10.1016/j.ijplas.2024.104225","url":null,"abstract":"<div><div>In this study, an innovative strategy of dislocation configuration and texture optimization is employed to achieve a heterogeneous dynamic-recovered (DRV) high-manganese steel via successive cold-warm-rolling (CWR). Compared with single-step warm-rolling (WR) treatment, the imposed cold deformation of CWR process not only results in more and finer dislocation cells in DRV grains, but also leads to texture optimization with intensity weakening and component changing. Hence, the CWR sample shows a higher yield strength (YS, ∼1.35 GPa) and ultimate tensile strength (UTS, ∼1.6 GPa) without sacrificing the tensile elongation (TEL, ∼57%) at LNT (liquid nitrogen temperature), accompanied with a significantly lower mechanical anisotropy. The exceptional cryogenic strength-ductility synergy can be attributed to following: i) the difference of YS comes from the additional Taylor hardening effect (∼150 MPa); ii) the prefer-orientated DRV grains with a high Schmid factor (SFR) of twinning induces the twin deflections or kinks at the dislocation boundary in the early deformation stage; and iii) the refined cell structure can increase the critical resolved shear stress (CRSS) of twin, act as twin nucleus and impede its growth, leading to the occurrence of high-density of nano-twin segment (thickness: ∼15 nm, number density: ∼1.1 × 10⁸ m^-3) at a high stress and strain level. Thus, the cooperative forest dislocation hardening (∼870 MPa) and dynamic Hall-Petch strengthening (∼220 MPa) effects can provide continuous strain hardening capacity. In contrast, the high ductility of the WR sample primarily originates from the abundant microband-induced plasticity correlated with limited twinning- (TWIP) and transformation-induced plasticity (TRIP) due to a coarse twin (∼22.5 nm) and martensite thickness (∼55 nm).</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104225"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887766","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":"Bulging of grain boundaries and core-shell dislocation structures enhance mechanical properties of equiatomic high-entropy alloys","authors":"Jungwan Lee ,&nbsp;Sun Ig Hong ,&nbsp;Hyoung Seop Kim","doi":"10.1016/j.ijplas.2024.104224","DOIUrl":"10.1016/j.ijplas.2024.104224","url":null,"abstract":"<div><div>Regulating elemental compositions of structural materials has been at the heart of interests for metallurgists to ensure target properties under harsh environments. For instance, metastability engineering that exploits phase transformation or deformation twinning depends on a minor modification in atomic compositions. Distinct from the well-studied control of elemental compositions, this work centers on a straightforward thermomechanical process of hot rolling to induce bulging of grain boundaries and core-shell dislocation cell structures. During the hot rolling, the bulging of grain boundaries releases high-density dislocation walls and more dislocations are distributed around the grain boundaries in equiatomic CoCrFeMnNi, one of the most studied high-entropy alloys. Under the tensile deformation at cryogenic temperatures with decreased stacking fault energy, the less stable grain boundaries promote the emanation of partial dislocations and the consequent formation of deformation twinning. As a result, the hot-rolled alloy exhibits an enhanced combination of yield strength of ∼941 MPa and uniform elongation of ∼54% at –196 °C, which is counterintuitive to low ductility of as-rolled metallic materials. This lies at the upper bound in comparison with tensile responses of precipitation-strengthened high-entropy alloys and high-strength steels. The higher propensity of deformation twins in hot-rolled alloy compared to that of cold-rolled and annealed one enhances strain hardening despite the hot-rolled state. Regarding the benefits of the streamlined thermomechanical history, this study validates the academic and industrial worth of hot-rolled metallic materials to develop the alloy science and fabricating technology.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104224"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887791","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":"Study of orientation-dependent residual strains during tensile and cyclic deformation of an austenitic stainless steel","authors":"Namit Pai,&nbsp;Indradev Samajdar,&nbsp;Anirban Patra","doi":"10.1016/j.ijplas.2024.104228","DOIUrl":"10.1016/j.ijplas.2024.104228","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This work presents a combined experimental and crystal plasticity finite element modeling study on the development of bulk and local residual strains during tensile and cyclic deformation of an austenitic stainless steel. The &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;l&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;-specific bulk (residual) lattice strains are measured using X-ray Diffraction, while the local residual strains are measured using High Resolution Electron Back Scatter Diffraction. The residual strains are predicted using a dislocation density-based crystal plasticity model, with consideration for directional hardening due to backstress evolution. The work emphasizes on residual strain developments for four specific grain families: &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;111&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;001&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;101&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;311&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, specifically in terms of their correlation with the underlying microstructure, studied using crystallographic orientation, misorientation, dislocation density and backstress evolution. Large intragranular orientation gradients, dislocation densities and backstress are observed during tensile deformation for the texturally dominant &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;101&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; grain family, indicating that these grains have higher plastic deformation as compared to the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;001&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;111&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; grain families. This also contributes to the observed relaxation in lattice strains for the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;101&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; grain family, with the resulting load shed being primarily accommodated by the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;001&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; grain family. In contrast, no such orientation gradients or lattice strain relaxations are observed in the cyclically deformed material. The measured local residual strains, which are also qualitatively predicted by the crystal plasticity simulations, highlight the additional effect of spatial heterogeneity and neighboring grains on the development of residual strains. Finally, statistical analysis of the simulated residual strains reveals that the hierarchy in the development of lattice strains is in the following order for the different grain families: &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;001&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;&gt;&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;311&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;&gt;&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;111&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;&gt;&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;101&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; for tensile deformation, and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;001&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;&gt;&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;311&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;&gt;&lt;/","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104228"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142911523","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 modeling of the damage and fracture behaviours of TA15 titanium alloy with trimodal microstructure","authors":"M.Y. Fei ,&nbsp;P.F. Gao ,&nbsp;Z.N. Lei ,&nbsp;H.W. Li ,&nbsp;M. Zhan ,&nbsp;M.W. Fu","doi":"10.1016/j.ijplas.2024.104238","DOIUrl":"10.1016/j.ijplas.2024.104238","url":null,"abstract":"<div><div>Trimodal microstructure, consisting of equiaxed <em>α</em> (<em>α</em>_p), lamellar <em>α</em> (<em>α</em>_l), and transformed <em>β</em> (<em>β</em>_t), has become an ideal target microstructure of titanium alloys. However, the complex microstructure morphologies and the differences in mechanical property among the three constituent phases of the trimodal microstructure significantly influence its microscopic crack propagation behaviour and further affect its fracture toughness. To address this issue, a multiscale finite element (FE) model, including a microscopic crack propagation (micro-CP) model and a macroscopic fracture toughness (macro-FT) model, was established for analysis and prediction of the damage fracture behaviour and property of the trimodal microstructure. In this model, the deformation, damage and fracture behaviours of the trimodal microstructure at both micro and macro scales were described by bridging the constitutive laws of constituent phases and deformation responses. In tandem with this, the micro-CP model adopted a macro-micro nested structure, and the macro-FT model was developed based on a virtual fracture toughness test. Using the established multiscale FE model, the dependence of microscopic crack propagation and macroscopic fracture behaviours on the constituent phases of the trimodal microstructure was revealed. It is found that both <em>α</em>_p and <em>α</em>_l improved the path tortuosity and energy consumption of microscopic crack propagation, and <em>α</em>_l decreased the microscopic crack propagation rate simultaneously. In addition, <em>α</em>_p and <em>α</em>_l contributed to the fracture toughness of the trimodal microstructure from both the intrinsic toughening mechanism (suppressing the heterogeneous deformation and damage and then decreasing the strength and increasing the plasticity) and the extrinsic toughening mechanism (increasing the tortuosity and energy consumption of crack propagation). The research provided an in-depth understanding of the damage and fracture behaviours of TA15 titanium alloy with the trimodal microstructure.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104238"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142908448","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}