International Journal of Plasticity最新文献

{"title":"Promoting strength–ductility synergy by mitigating heterogeneity in precipitation-strengthened FCC/B2 dual-phase high-entropy alloy","authors":"Yuhao Jia ,&nbsp;Qingfeng Wu ,&nbsp;Feng He ,&nbsp;Zhongsheng Yang ,&nbsp;Linxiang Liu ,&nbsp;Xin Liu ,&nbsp;Xiaoyu Bai ,&nbsp;Bojing Guo ,&nbsp;Hyoung Seop Kim ,&nbsp;Junjie Li ,&nbsp;Jincheng Wang ,&nbsp;Zhijun Wang","doi":"10.1016/j.ijplas.2024.104213","DOIUrl":"10.1016/j.ijplas.2024.104213","url":null,"abstract":"<div><div>This study introduces a novel heterogeneity-mitigating strategy to enhance the strength-ductility synergy in precipitation-strengthened FCC/B2 dual-phase high-entropy alloys (DP-HEAs), addressing the challenge of strain localization and interfacial cracking between phases. While traditional FCC/B2 DP-HEAs benefit from heterogeneous deformation-induced effects, increased strength in precipitation-strengthened FCC/B2 DP-HEAs often leads to premature failure due to strain localization. Traditional approaches, such as microstructure refinement and morphological regulation, often fall short, especially in alloys with significant phase volume fraction differences and precipitation. By employing precise microstructural regulation, the heterogeneity-mitigating strategy achieves a twofold increase in ductility and a significant enhancement in strength. The micro-digital image correlation technique elucidates the role of dual-phase heterogeneity in interfacial strain partitioning, while nanoindentation and simulations reveal the intrinsic link between reduced heterogeneity and improved deformation compatibility. This approach overcomes the limitations of existing methods, offering a new pathway for the synergistic enhancement of strength and ductility in precipitation-strengthened FCC/B2 DP-HEAs with differing phase properties and volume fractions.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104213"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823101","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":"Temperature-dependent microscopic deformation mechanisms and performance enhancement prospects in high-cycle fatigue of nickel-based single crystal superalloys","authors":"Jiachen Xu ,&nbsp;Xinbao Zhao ,&nbsp;Jishan Chen ,&nbsp;Pengfei Wang ,&nbsp;Hao Liu ,&nbsp;Wanshun Xia ,&nbsp;Quanzhao Yue ,&nbsp;Yuefeng Gu ,&nbsp;Ze Zhang","doi":"10.1016/j.ijplas.2024.104207","DOIUrl":"10.1016/j.ijplas.2024.104207","url":null,"abstract":"<div><div>Given the limited systematic analysis of microstructural deformation mechanisms in high-cycle fatigue, this study investigates the high-cycle fatigue failure of a fourth-generation nickel-based single crystal superalloy across temperatures of 700 °C, 850 °C, and 980 °C. The results indicate that the alloy exhibits optimal performance at 980 °C, followed by 700 °C and then 850 °C. At 700 °C, stacking fault locks and Lomer-Cottrell dislocations were identified, whereas, at 850 °C, elongated stacking fault shearing and typical cross-slip were observed. Notably, at 980 °C, intense dislocation activity was detected, including Kear-Wilsdorf locks, dislocation pile-up, and entanglement. The observed changes in microstructural mechanisms with increasing temperature are attributed to elevated stacking fault energy and critical shear stress, alongside reduced critical stress for various dislocation movements. Furthermore, the types of Lomer-Cottrell dislocation and Kear-Wilsdorf lock were accurately identified. In conclusion, the dominant micro-deformation mechanisms—stacking fault locks, Lomer-Cottrell dislocations, and dislocation hardening behaviors such as Kear-Wilsdorf locks—significantly enhance high-cycle fatigue performance. This research addresses the scarcity of studies on microscopic deformation mechanisms in single crystal high-cycle fatigue and provides valuable insights for optimizing the high-cycle fatigue performance of nickel-based superalloys.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104207"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793231","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":"Graph neural network unveils the spatiotemporal evolution of structural defects in sheared granular materials","authors":"Jiangzhou Mei ,&nbsp;Gang Ma ,&nbsp;Wanda Cao ,&nbsp;Ting Wu ,&nbsp;Wei Zhou","doi":"10.1016/j.ijplas.2024.104218","DOIUrl":"10.1016/j.ijplas.2024.104218","url":null,"abstract":"<div><div>The disordered nature of granular materials poses great difficulty to the accurate characterization of microscopic structures. Despite numerous handcrafted structural indicators, the relationship between particle-scale structure and dynamics, as well as the structural origins of complex constitutive behaviors, remain subjects of debate. In this paper, we utilize a Graph Convolutional Neural Network (GCNN) to establish the structure-property relationship within granular materials. The GCNN model effectively identifies active particles exhibiting intense nonaffine activities based solely on initial particle positions, without relying on handcrafted features. Additionally, we derive a structural indicator called susceptibility from the GCNN output, which quantifies the fragility of local structures to external stimuli and enables the characterization of structural evolution during the shearing process. We demonstrate that structural defects with high susceptibility tend to form spatial clusters, and the distinct failure modes in dense and loose granular assemblies are driven by the differing spatiotemporal evolution of these defect clusters. Our findings suggest that the structural origin of macroscopic yielding in dense granular materials lies in the formation of system-spanning defect clusters, which facilitates the percolation of high-mobility zones and the development of shear bands. Finally, our study indicates that graph-based neural networks are well-suited for modeling and predicting the complex behaviors of granular materials, providing a powerful approach to uncovering underlying mechanisms and deepening our understanding of these materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104218"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857914","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 thermal stress-driven dislocation and low-angle grain boundary migration in surface plastic deformation and grain orientation evolution of tungsten under thermal shock","authors":"Meng-Chong Ren ,&nbsp;Yu-Fei Nie ,&nbsp;Han-Qing Wang ,&nbsp;Yue Yuan ,&nbsp;Fan Feng ,&nbsp;You-Yun Lian ,&nbsp;Hao Yin ,&nbsp;Long Cheng ,&nbsp;Duo-Qi Shi ,&nbsp;Guang-Hong Lu","doi":"10.1016/j.ijplas.2024.104205","DOIUrl":"10.1016/j.ijplas.2024.104205","url":null,"abstract":"<div><div>This study reveals that thermal fatigue loading (transient thermal shock), similar to that in fusion environments, can serve as a surface processing technique for BCC metals. Regions with a {110} grain orientation can be selectively achieved in varying sizes and locations on the sample surface. Furthermore, our experiments confirm that the specific localized orientation transformation obtained through this method exhibits certain high-temperature stability at 1573 K (above the recrystallization temperature of tungsten). The experiment employed a 0.25 GW/m² high-energy pulsed electron beam for 1 ms to cyclically load the tungsten surface, simulating edge localized mode events in fusion conditions. It was found that tungsten exhibited significant surface grain orientation transformation (distinct {110} grain orientation) under low strain (∼ 1 %) after transient thermal shocks, a phenomenon rarely mentioned in studies of thermal shock on fusion reactor divertor materials. Microstructure characterization results suggest that this localized orientation transformation, induced by minor surface damage, primarily results from the generation, movement, and evolution of dislocations into subgrain and low-angle grain boundaries. The cyclic accumulation of the migration of kink-like subgrain/low-angle grain boundaries under transient thermal stress at high temperatures drives this process. Subsequently, crystal plasticity finite element method simulations based on dislocation slip were conducted to study the surface grain orientation transformation of tungsten under compressive thermal stress. This predictive capability provides valuable guidance for understanding the service conditions of fusion reactor divertor materials. Furthermore, we propose that cyclic transient thermal shocks can serve as an effective surface processing technique for metals, enabling the formation of specific localized grain orientations.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104205"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The interfacial damage of the deformation heterogeneity in the transformation-induced plasticity (TRIP)-assisted duplex stainless steel","authors":"Wenbin Zhang ,&nbsp;Miao Jin ,&nbsp;Shuo Hao ,&nbsp;Mingshuai Huo ,&nbsp;Zhenyi Huang ,&nbsp;Lei Chen ,&nbsp;Wenzhen Xia","doi":"10.1016/j.ijplas.2024.104209","DOIUrl":"10.1016/j.ijplas.2024.104209","url":null,"abstract":"<div><div>The characteristic of differences in material properties between phases gives rise to significant deformation heterogeneity in dual-phase or multi-phase materials, consequently resulting in complex damage laws. In this study, the microcracks characteristics of transformation-induced plasticity (TRIP)-assisted duplex stainless steel were observed after large deformation (engineering strain up to 55%). It has been determined that microcracks invariably occur at interface locations, including the phase boundary between original austenite and ferrite, the grain boundary of original austenite, and the grain boundary of ferrite. The deformation heterogeneity of various types of interfaces is analyzed by using crystal plasticity finite element method (CPFEM). Deformation degree coordination parameter <span><math><msub><mi>k</mi><mi>l</mi></msub></math></span> and slip transfer parameter <span><math><msub><mi>k</mi><mrow><mi>t</mi><mi>f</mi></mrow></msub></math></span> are established, based on the velocity gradient tensor <span><math><msub><mi>L</mi><mi>p</mi></msub></math></span> and the slipping rate <span><math><mover><mi>γ</mi><mi>˙</mi></mover></math></span> of activated slip system in CPFEM, to analyze the multi-slip heterogeneous deformation behavior of grains on both sides of the interface. A novel interfacial damage model considering the slip transfer parameter <span><math><msub><mi>k</mi><mrow><mi>t</mi><mi>f</mi></mrow></msub></math></span> is established, which reveals the correlation between deformation heterogeneity and damage mechanism, to provide a criterion for various types of interfacial failure behaviors. The interfacial damage model based on deformation heterogeneity can stand as an invaluable instrument for exploring the damage behaviors of two-phase or multi-phase materials.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104209"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809424","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":"Tensorial interaction model for the effect of short-range order on single crystalline medium entropy alloys","authors":"Cewen Xiao ,&nbsp;Long Yu ,&nbsp;Xiazi Xiao","doi":"10.1016/j.ijplas.2024.104200","DOIUrl":"10.1016/j.ijplas.2024.104200","url":null,"abstract":"<div><div>In order to help comprehend the influence of short-range order (SRO) structures on both the mechanical property and microstructural evolution of single crystalline medium entropy alloys (MEAs), a physical mechanism-based crystal plasticity theory is developed in this work, which covers the deformation mechanisms of dislocation-SRO interaction, network dislocation interaction, dislocation-twin boundary interaction, twinning deformation and solid solute strengthening. Thereinto, a tensorial interaction model is proposed to effectively characterize the spatial interaction between SROs on the characteristic planes and dislocations on the slip planes, which can not only address the increase of yield stress related to the impediment of slip dislocations by SROs, but also capture the phenomenon of decreasing flow stress after the yield point due to the destruction of SRO structures. Moreover, twinning deformation has been additionally taken into account by considering the complex hardening behavior related to both co-planar and non-co-planar twinning. To help validate the proposed constitutive equations, the stress-strain relations of single crystalline CrCoNi under three different loading directions are compared between the experimental data and theoretical results. A good agreement is achieved that can help verify the proposed theoretical model and facilitate the comprehension of the underlying deformation mechanisms.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104200"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782369","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":"Interactions of austenite-martensite interfaces with Ni4Ti3 precipitates in NiTi shape memory alloy: A molecular dynamics investigation","authors":"Gabriel Plummer ,&nbsp;Mikhail I. Mendelev ,&nbsp;Othmane Benafan ,&nbsp;John W. Lawson","doi":"10.1016/j.ijplas.2024.104203","DOIUrl":"10.1016/j.ijplas.2024.104203","url":null,"abstract":"<div><div>Precipitation of secondary phases is a common strategy used to control both the structural and functional properties of shape memory alloys. It can be used to promote nucleation of the martensitic transformation as well as improve cyclic stability. Less is understood about how precipitates affect the progression of an ongoing transformation, i.e., motion of austenite-martensite interfaces. In this study, we performed molecular dynamics simulations of the interaction of austenite-martensite interfaces moving in the NiTi alloy with Ni₄Ti₃ precipitates. It was found that the nanoscale precipitates obstruct interface motion until a sufficient undercooling is reached. The simulation results can be quantitatively explained with thermoelastic effects – elastic deformation of the precipitates acts to oppose the thermodynamic driving force favoring the transformation. A simple model is proposed to predict a more difficult transformation in shape memory alloys with higher concentrations of and/or harder precipitates. Additionally, simulations of cyclic transformations implicate inelastic deformation at the precipitate-matrix interface as one mechanism responsible for the cyclic drift in transformation characteristics. Deformation originated in a thin, amorphous interfacial layer and expanded with increasing cycles.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104203"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788408","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":"Stability of high energy superlattice faults in Ni-based superalloys from atomistic simulations","authors":"Valery V. Borovikov ,&nbsp;Mikhail I. Mendelev ,&nbsp;Timothy M. Smith ,&nbsp;John W. Lawson","doi":"10.1016/j.ijplas.2024.104199","DOIUrl":"10.1016/j.ijplas.2024.104199","url":null,"abstract":"<div><div>High energy stacking faults generated by lattice dislocations entering the strengthening precipitates of Ni-based superalloys are responsible for the unique mechanical properties of these structural materials. However, the question about stability of these faults has not received the attention it deserves. Using atomistic simulations, we show that the anti-phase boundary (APB) can spontaneously transform into super intrinsic stacking fault (SISF) and the complex stacking fault (CSF) can spontaneously transform into L1₂ lattice structure. The former transformation explains the experimentally observed presence of isolated SISFs and super extrinsic stacking faults (SESFs) in the precipitates. Finally, multiple studies were focused on finding alloying additions which increase the APB and CSF energies. We demonstrate therefore that alloying additions which increase stacking fault energies may conversely decrease their stabilities.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104199"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763440","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":"Controlling behaviour of constitutive models for rocks using energy dissipations","authors":"Nhan T. Nguyen ,&nbsp;Giang D. Nguyen ,&nbsp;Murat Karakus ,&nbsp;Ha H. Bui ,&nbsp;Dat G. Phan","doi":"10.1016/j.ijplas.2024.104196","DOIUrl":"10.1016/j.ijplas.2024.104196","url":null,"abstract":"<div><div>The behaviour of rocks and other similar geomaterials is governed by different underling dissipative mechanisms that can be represented by damage and plastic strains in continuum constitutive modelling. The explicit links between these dissipative mechanisms and constitutive behaviour are established in this study in a generic thermodynamics-based framework. The key feature of this proposed framework and derived damage-plasticity models is the capability to control the constitutive behaviour through varying the contributions of different dissipative mechanisms to the total dissipation budget. Particularly, three fractions of the total dissipation budget related to damage, plastic volumetric and shear dissipations are introduced to control the constitutive behaviour through the evolution of damage variable and plastic strains, respectively. The examples provided show the performance and promising features of the proposed framework.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104196"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic insights into twinning and detwinning during fatigue short crack growth in zirconium alloys","authors":"Weifeng Wan ,&nbsp;Yu Cheng ,&nbsp;Chaitanya Paramatmuni ,&nbsp;Xiaoxian Zhang ,&nbsp;Vasilis Karamitros ,&nbsp;Dawei Huang ,&nbsp;Xiaojun Yan","doi":"10.1016/j.ijplas.2024.104210","DOIUrl":"10.1016/j.ijplas.2024.104210","url":null,"abstract":"<div><div>This study investigates fatigue short crack growth in Zircaloy-4 alloy, revealing phenomena of twinning and detwinning of {<span><math><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow></math></span>}&lt;<span><math><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>1</mn></mrow></math></span>&gt; tensile type at the vicinity of the crack. Twinning primarily occurs at the crack tip, crack deflection sites, and adjacent heterogeneities such as grain boundaries and triple junctions. Both twinning and slip contribute simultaneously to crack tip plasticity. The occurrence of twinning significantly increases the average stress and stored energy density at the crack tip, thereby accelerating short crack propagation. Twinning forms earlier in Z-type samples (with the texture pole aligned with the Z-direction) compared to Y-type samples, resulting in an earlier and more pronounced increase in crack growth rate. Detwinning is observed exclusively in Z-type samples, induced by substantial changes in stress distribution at the crack tip, likely due to dislocation pile-up at the twin boundary during crack growth.</div></div>","PeriodicalId":340,"journal":{"name":"International Journal of Plasticity","volume":"184 ","pages":"Article 104210"},"PeriodicalIF":9.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809866","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}