International Journal of Plasticity最新文献

{"title":"Multi-element segregation strengthening and doping softening of Σ5 (210) [001] symmetrically tilted grain boundary in Ni-based bicrystal","authors":"Hao Hu ,&nbsp;Tao Fu ,&nbsp;Shiyi Wang ,&nbsp;Chuanying Li ,&nbsp;Shayuan Weng ,&nbsp;Deqiang Yin ,&nbsp;Xianghe Peng","doi":"10.1016/j.ijplas.2024.104219","DOIUrl":"10.1016/j.ijplas.2024.104219","url":null,"abstract":"<div><div>Alloying is an economically efficient strategy to improve the thermal and mechanical stability of materials, which can also be applied to grain boundary (GB) in nanocrystalline materials to improve their mechanical properties. In this work, we investigated the mechanical properties and plastic deformation of bicrystal Ni samples with/without doping and segregation of multi-element (ME) atoms (including Co, Cr, Fe, and Mn atoms) using molecular dynamics (MD) simulations and Monte Carlo (MC) calculations at various temperatures. Each sample contains a Σ5 (210) [001] symmetric tilted GB. It was found that ME doping results in partial GB migration and softening, while ME segregation hinders GB migration, leading to strengthening. The softening and strengthening stem respectively from the distribution of ME atoms in the non-coincident site lattice (non-CSL) and in the coincident site lattice (CSL) sites. Furthermore, temperature affects the GB migration in ME-doped and ME-segregated samples through the compatibility of the ME atoms in GB. The results presented may contribute to understanding the mechanisms of strengthening and softening caused by ME doping and segregation at the atomic scale, and provide a perspective on the balance between strength and ductility.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104219"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867255","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 aluminum matrix composite through \"dual-metal\" heterogeneous structure and interface control","authors":"Yanzhi Peng ,&nbsp;Caiju Li ,&nbsp;Min Song ,&nbsp;Zunyan Xu ,&nbsp;Chenmaoyue Yang ,&nbsp;Qiong Lu ,&nbsp;Liang Liu ,&nbsp;Xiaofeng Chen ,&nbsp;Yichun Liu ,&nbsp;Jianhong Yi","doi":"10.1016/j.ijplas.2024.104216","DOIUrl":"10.1016/j.ijplas.2024.104216","url":null,"abstract":"<div><div>Heterogeneous microstructure design has been a prevalent strategy for breaking the strength-ductility dilemma in structural materials. However, it is still difficult to achieve customizable heterogeneous microstructures. Here, we employ a simple powder metallurgy method to construct \"dual-metal\" heterogeneous structure in aluminum matrix composite (AMC) by introducing hard high-entropy alloy particles into the soft aluminum matrix. By using mutual diffusion and self-organization strategies, reinforcements with special core-shell structures were synthesized <em>in situ</em>, forming multi-level heterogeneous structures within the composites. The results show that the heterogeneity of the microstructure plays an effective role in regulating the strain gradient and maintaining significant strain hardening ability during plastic deformation. In addition, the nanograin layer of the core-shell reinforcement outer shell possesses good toughness and stress-bearing capacity, enabling it to accommodate deformation and inhibit crack propagation effectively. This study provides a feasible method for designing AMCs with heterogeneous structures and contributes a conceptual framework for designing strong and ductile metal matrix composites.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104216"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857912","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":"Mechanisms of secondary crack initiation, propagation and closure during the water quenching process in medium-carbon martensitic steel","authors":"Hongqing Zheng ,&nbsp;Yuchen Yang ,&nbsp;Jie Li ,&nbsp;Xunwei Zuo ,&nbsp;Jianfeng Wan ,&nbsp;Yonghua Rong ,&nbsp;Nailu Chen","doi":"10.1016/j.ijplas.2025.104240","DOIUrl":"10.1016/j.ijplas.2025.104240","url":null,"abstract":"<div><div>A polycrystalline elastic-plastic phase field model is proposed to reveal the mechanisms of secondary crack initiation, propagation and closure during the water quenching process in medium-carbon martensitic steel. The formation of martensite variants during the quenching process is considered in our model. Moreover, this model can account for the influence of the elastic stress and plastic strain generated after the martensitic transformation during the quenching process on the fracture process. The simulation results show that secondary cracks initiate at the grain boundary region near the primary crack due to its induction. Additionally, they can also initiate at multiple locations in the high-angle grain boundary regions far from the primary crack. This occurs due to elastic stress concentration and plastic strain localization in these regions. Then secondary cracks mainly propagate along prior austenite grain boundary areas. The tensile stress on both sides of the crack tip is the main driving force for crack initiation and propagation. As the external loading increases, the stress at the crack tip gradually transitions into compressive stress, ultimately leading to the closure of the crack in the grain boundary regions. More importantly, these propagation paths of secondary cracks are consistent with the experimental results. Compared with intracrystalline defects, grain boundary defects are more likely to induce crack initiation and propagation. Therefore, this model can offer theoretical guidance for solving the issue of water quenching cracking in medium-carbon martensitic steel.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104240"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142935215","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 work hardening through tuning TRIP by nano-precipitates in maraging stainless steels","authors":"Junpeng Li ,&nbsp;Yang Zhang ,&nbsp;Weiguo Jiang ,&nbsp;Junhua Luan ,&nbsp;Zengbao Jiao ,&nbsp;Chain Tsuan Liu ,&nbsp;Zhongwu Zhang","doi":"10.1016/j.ijplas.2025.104265","DOIUrl":"10.1016/j.ijplas.2025.104265","url":null,"abstract":"<div><div>The transformation-induced plasticity (TRIP) effect is one of the most powerful approaches to improve mechanical properties and work hardening capability of maraging stainless steels (MSSs). However, controlling the TRIP effect poses a great challenge due to the difficulties in manipulating the stability of reverted austenite (RA). In this work, through introducing nano-precipitates into the RA, we achieved a significant improvement in the work-hardening ability for MSSs. The role of the RA decorated and not decorated by nano-precipitates (RADP and RANDP, respectively) was carefully investigated. The precipitation of Ni₃(Ti, Mo) and Mo-rich phases within RA causes a low stacking fault energy (SFE) in the RADP compared to the RANDP. In the initial stage of deformation, the RADP is susceptible to the TRIP effect due to the low SFE, which can effectively relieve stresses. Upon further deformation, the nano-precipitates within the RA can block the movement of the 1/6 &lt; 112&gt; Shockley partial dislocations and delay the transformation, thus improving the stability of the RA. This results in a sustainable absorption of stresses and delays the initiation and propagation of cracks. Moreover, the nano-precipitates in the matrix provide a significant increase in strength. Consequently, an excellent combination of high strength, ductility, and work-hardening ability was obtained in the MSSs. The newly developed MSS demonstrates a yield strength of 1790 ± 24 MPa, a tensile strength of 2140 ± 32 MPa, a uniform elongation of 9.5 ± 1.3 % and a total elongation of 16.4 ± 1.1 %. Exploiting the nano-precipitation within RA to tune the TRIP effect provides a new approach for developing high-performance MSSs.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"186 ","pages":"Article 104265"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072584","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":"Twinning induced by asymmetric shear response","authors":"Jie Huang ,&nbsp;Mingyu Lei ,&nbsp;Guochun Yang ,&nbsp;Bin Wen","doi":"10.1016/j.ijplas.2024.104226","DOIUrl":"10.1016/j.ijplas.2024.104226","url":null,"abstract":"<div><div>Twinning, a plastic deformation mode, is crucial in dictating material plasticity and significantly impacting their mechanical properties. In this work, we propose a new twinning mechanism based on the phenomenon of asymmetric shear response. By integrating transition state theory with this mechanism, we derive the twinning nucleation stress, and reveal the impact of temperature and strain rate on twin nucleation and growth processes. The model's efficacy is validated through a comparison of predicted results for face centered cubic (FCC), body centered cubic (BCC) and hexagonal close packed (HCP) crystals with experimental ones. This work provides a theoretical foundation for predicting the conditions under which twinning occurs, thereby guiding the design and fabrication of materials containing twin structures.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104226"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887067","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 strength and ductility of pure metal via multi-scale and multitype composite heterostructuring","authors":"Zhide Li ,&nbsp;Cheng Lu ,&nbsp;Charlie Kong ,&nbsp;M.W. Fu ,&nbsp;Hailiang Yu","doi":"10.1016/j.ijplas.2025.104241","DOIUrl":"10.1016/j.ijplas.2025.104241","url":null,"abstract":"<div><div>High strength and good ductility are essential for the engineering applications of structural materials, yet these two attributes often do not coexist. In the present study, a composite heterostructuring designed with multi-scale, lamellar, and bimodal was developed to deal with the trade-off between strength and ductility. This heterostructuring includes coarse-grain soft domains arranged in a lamellar structure within a matrix characterized by both fine and ultrafine grains arranged in a bimodal structure created through a straightforward thermo-mechanical process. The gradient in strength among various grain structures generates a gradient in strain during deformation. This promotes the generation of additional geometrically necessary dislocations (GNDs) in the soft domain, favouring strength enhancement. The ongoing and efficient accumulation and evolution of GNDs within the soft domains are further developed into the dislocation cells and subgrain boundaries, which, on the other hand, increase the strain hardening and, hence, the ductility.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104241"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142924679","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":"Simultaneously enhancing strength and plasticity via direct ageing in additive manufactured Al–Ni–Sc–Zr alloys","authors":"Guandong Luo ,&nbsp;Han Chen ,&nbsp;Lei Hu ,&nbsp;Chen Yang ,&nbsp;Shuwei Zong ,&nbsp;Yanchi Chen ,&nbsp;Qing Lian ,&nbsp;Hongze Wang ,&nbsp;Zhe Chen ,&nbsp;Yi Wu ,&nbsp;Haowei Wang","doi":"10.1016/j.ijplas.2025.104243","DOIUrl":"10.1016/j.ijplas.2025.104243","url":null,"abstract":"<div><div>Eutectic Al alloys processed by laser powder bed fusion (LPBF) frequently display metastable cellular structures. The cells are susceptible to decomposition into nanoparticles during ageing. Furthermore, supersaturated solutes can result in additional precipitation during the ageing process. The complicated microstructure evolution observed in LPBF eutectic Al alloys necessitates a comprehensive investigation into their ageing behaviour, to identify the optimal strength and plasticity. Consequently, this study presents a systematic examination of the impact of direct ageing on microstructure evolution in an LPBF Al‒Ni‒Sc‒Zr alloy, analysing associated changes in strength and plasticity. The optimal ageing parameters for strength and plasticity are determined. The results demonstrate that the reduction in strength resulting from cell decomposition can be offset by the strengthening provided by nanoparticles formed due to cell wall spheroidisation and additional supersaturated solute precipitation, achieving excellent yield strength. Furthermore, the transformation of cells into nanoparticles significantly enhances the plasticity by increasing non-uniform strain, which is not well explained by the conventional work hardening theory. A detailed investigation suggests that direct ageing can alleviate dislocation pile-up and strain localisation around cell walls, and reduce the tendency for crack propagation along melt pool boundaries, resulting in a significant increase in non-uniform strain and ultimately, excellent tensile plasticity. This study demonstrates that direct ageing is an effective strategy for simultaneously enhancing the strength and plasticity of LPBF Al–Ni based alloys. The proposed plasticity mechanism offers a new insight into the plastic deformation behaviour of LPBF eutectic Al alloys.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"185 ","pages":"Article 104243"},"PeriodicalIF":9.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937011","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":"Microcracking in additively manufactured tungsten: Experiment and a nano-micro-macro multiscale model","authors":"Zhun Liang ,&nbsp;Junhao Wu ,&nbsp;Changmeng Liu ,&nbsp;Yinan Cui","doi":"10.1016/j.ijplas.2025.104264","DOIUrl":"10.1016/j.ijplas.2025.104264","url":null,"abstract":"<div><div>Microcracking is a prevalent and critical issue in additively manufactured tungsten, significantly restricting its safety-critical engineering applications. Till now, most of our current knowledge about microcracking is based on the observation after additive manufacturing (AM) processing, the real-time evolution of microcracking is still largely unexplored, which is challenged by the complex multi-physics and multiscale nature of AM. To gain deeper insights, a multiscale model is developed in the current work, which integrates a multiphysics thermal-fluid model to consider the solidification process and the evolution of temperature, a crystal plasticity model to explore the evolution of dislocations and stress, as well as an atomistic simulation informed cohesive zone model to consider the microcracking at grain boundary (GB). The simulation results show great agreement with <em>in-situ</em> and <em>ex-situ</em> AM experiments of tungsten. The real-time microcracking evolution at GB in the grain-size scale is captured. It is found that the transverse microcracks that traverse the entire GB typically form after multiple scan tracks. A phase diagram is obtained to correlate microcrack density with scanning speed and power. The effect of non-Schmid effect, GB strength and substrate preheating are also systematically analyzed. This work advances the understanding of microcracking mechanisms in AM, offering valuable guidance for improving the fabrication process to mitigate microcrack formation.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"186 ","pages":"Article 104264"},"PeriodicalIF":9.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071792","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":"Role of face centered cubic/body centered cubic phase boundary crystallography on void growth","authors":"Paul G. Christodoulou ,&nbsp;Miroslav Zecevic ,&nbsp;Ricardo A. Lebensohn ,&nbsp;Irene J. Beyerlein","doi":"10.1016/j.ijplas.2025.104259","DOIUrl":"10.1016/j.ijplas.2025.104259","url":null,"abstract":"<div><div>In this work, using a mesoscale model, we investigate void growth as mediated by plastic slip at face-centered cubic (FCC)/body centered cubic (BCC) phase boundaries. We employ a large-strain elasto-visco-plastic fast Fourier transform (LS-EVP-FFT) crystal plasticity model with the advantage of treating smooth conformal void surfaces in a crystal. The calculations aim to identify the role of crystallographic orientation, phase boundary inclination, strain hardening, and BCC slip mode selection. To this end, both model FCC/BCC boundaries and FCC Cu/BCC Ta boundaries are considered, as well as commonly found phase boundary characters and a wide range of orientation relationships. We show that at Kurdjumov–Sachs (K–S) interfaces the void prefers to grow in the BCC crystal regardless of slip mode selection or hardening rate. The void grows faster when two slip modes <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> and <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>112</mn><mo>}</mo></mrow></mrow></math></span> are available in the BCC grain than when only the <span><math><mrow><mrow><mo>〈</mo><mn>111</mn><mo>〉</mo></mrow><mrow><mo>{</mo><mn>110</mn><mo>}</mo></mrow></mrow></math></span> mode is available. The differing hardening rates expected of Cu and Ta lead to an overwhelmingly strong preference for void growth into the Ta side than the Cu side, regardless of orientations, orientation relationships, and phase boundary inclinations.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"186 ","pages":"Article 104259"},"PeriodicalIF":9.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056779","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":"Thermodynamically consistent damage evolution model coupled with rate-dependent crystal plasticity: Application to high-strength low alloy steel at various strain rates","authors":"Sandipkumar Dayani ,&nbsp;Waqas Muhammad ,&nbsp;Abhijit Brahme ,&nbsp;Fatemah Hekmat ,&nbsp;Trevor Sabiston ,&nbsp;Kaan Inal","doi":"10.1016/j.ijplas.2025.104255","DOIUrl":"10.1016/j.ijplas.2025.104255","url":null,"abstract":"<div><div>High-strength low-alloy (HSLA) steels demonstrate superior strength and load-bearing capacity compared to traditional plain carbon steel. However, these steels are susceptible to microstructural damage even at intermediate strain rates, which can compromise their performance in automotive application. This research aims to investigate the stress-strain response, internal temperature rise, and damage evolution in HSLA steels under quasi-static and intermediate strain rates. The initial microstructure of two different grades of HSLA steels, HR340 and HR550, are characterized using Electron Backscatter Diffraction (EBSD) data. During uniaxial tensile tests at various strain rates, a high-speed infrared thermal camera is utilized to capture the rise of the instantaneous surface temperature within the gauge section of the specimens. A new, thermodynamically consistent rate-dependent crystal plasticity formulation is developed. The damage evolution is governed by a thermodynamic driving force that accounts for various effects (i.e., temperature, void nucleation, and void growth). A power-law based damage formulation is proposed to account for the effects of strain rates and internal temperature rise on the damage evolution. The constitutive model is implemented into a crystal plasticity (CP) formulation to study the effects of damage, temperature and texture evolution on localized deformation in HSLA steel. The constitutive model is calibrated using experimental stress-strain data and temperature evolution measurements at different strain rates. The new model not only accurately predicts the softening/post-necking behaviour and failure of HR340 and HR550 but also accurately captures temperature variations in the material, aligning well with experimental results. The texture evolution prediction by the developed model also demonstrated good agreement with experimentally observed texture evolution at different strain rates. This study highlights the significant influence of strain rate and internal temperature rise on the damage, dislocation density evolution and microstructural behavior of HSLA steels. The model serves as a robust physics-based foundation for future investigative studies.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"186 ","pages":"Article 104255"},"PeriodicalIF":9.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056778","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}