Metals and Materials International最新文献_第4页

Computational Analysis on the Composition-Dependent Solute Clustering Behavior During Early-Stage Natural Aging in Al–Si–Mg–(Cu) Alloys Al-Si-Mg - (Cu)合金早期自然时效中溶质聚类行为的计算分析

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-29 DOI: 10.1007/s12540-025-02171-8

S. J. Lee, W. S. Ko, D.H. Bae

{"title":"Computational Analysis on the Composition-Dependent Solute Clustering Behavior During Early-Stage Natural Aging in Al–Si–Mg–(Cu) Alloys","authors":"S. J. Lee, W. S. Ko, D.H. Bae","doi":"10.1007/s12540-025-02171-8","DOIUrl":"10.1007/s12540-025-02171-8","url":null,"abstract":"<div><p>This paper presents a comprehensive computational analysis of solute clusters formed during the natural aging (NA) of Al–Si–Mg–(Cu) alloys. The behavior of solute–solute and solute–vacancy pairs are predicted using density functional theory calculations, based on the solute binding energy and obtained the two-body interaction parameters for kinetic Monte Carlo (KMC) simulations. The KMC results reveal that clusters in Al–Si–Mg alloys grow to ~ 30 atoms within 1440 min of NA, with their Mg and Si compositions mirroring those of the alloy. In Cu-added alloys, the clusters grow more rapidly, and their composition distributions lean toward Mg-rich clusters. We evaluated cluster stability by calculating the cluster energy for all configurations with up to 19 atoms. Stable clusters consistently exhibited <i>β</i>-Mg<sub>2</sub>Si stoichiometry, and their stability increased with cluster growth, indicating an underlying solute cluster growth mechanism. Vacancy trapping was more pronounced in the Si-rich clusters, leading to increased stability, which impedes the formation of precipitates during artificial aging. Quantitative analysis of the local strain distribution around the solute dimers enabled the calculation of its strengthening contribution, revealing that clusters with Mg/(Mg + Si) = 0.5 exhibited the most significant strengthening effect.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3328 - 3345"},"PeriodicalIF":4.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and Analysis of Ni–Al2O3–TiO2–WC Coatings Through Various Plating Cycles and Varying Sizes of Reinforcement Ni-Al2O3-TiO2-WC镀层在不同电镀周期和不同增强剂尺寸下的发展与分析

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-29 DOI: 10.1007/s12540-025-02162-9

Hamzeh Foratirad, Ali Hadipour

{"title":"Development and Analysis of Ni–Al2O3–TiO2–WC Coatings Through Various Plating Cycles and Varying Sizes of Reinforcement","authors":"Hamzeh Foratirad, Ali Hadipour","doi":"10.1007/s12540-025-02162-9","DOIUrl":"10.1007/s12540-025-02162-9","url":null,"abstract":"<p>In this research, the development and analysis of nickel matrix coatings incorporating Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, and WC reinforcing particles of varying submicron (600 nm) and nano (50 nm) dimensions were examined. All coatings underwent plating with different current cycles at two constant current densities of 4 and 8 A/dm<sup>2</sup>. The findings indicated that in positive cycles, the concentration of reinforcing particles was significantly greater than in coatings produced with negative cycles. The highest recorded value was 42 vol%, while the lowest was 10 vol%. The quantity of Al<sub>2</sub>O<sub>3</sub> particles was consistently higher (approximately 1.5 times) than that of TiO<sub>2</sub> and WC across all samples, attributed to their nano-scale and smaller sizes. Implementing a negative cycle during the coating process altered the morphology of the coatings from a cauliflower structure to a pyramidal. Also, it reduced the micron-sized cracks within the coating. Increasing the plating current density from 4 to 8 A/dm<sup>2</sup> not only enhanced the contribution of reinforcing particles but also led to increased agglomeration and cross-sectional cracking, which adversely affected wear and corrosion resistance. The high hardness (389 and 371 Vickers), compact and uniform morphology, along with the substantial presence of reinforcing particles in the nickel matrix, significantly improved the wear resistance of related samples. Furthermore, the effective distribution of reinforcing particles with fewer continuous structural cracks contributed to a reduction in corrosion current density (J<sub>corr</sub>).</p>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3447 - 3461"},"PeriodicalIF":4.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combined Effects of Pre-deformation and Natural Aging on Creep Aging Behavior of 2A14 Aluminum Alloy: A Hybrid Constitutive Modeling Approach 预变形和自然时效对2A14铝合金蠕变时效行为的联合影响：一种混合本构建模方法

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-29 DOI: 10.1007/s12540-025-02156-7

Shuangbo Li, Lihua Zhan, Hao Xie, Youliang Yang, Zili Wang, Quanqing Zeng, Yi Xiong

{"title":"Combined Effects of Pre-deformation and Natural Aging on Creep Aging Behavior of 2A14 Aluminum Alloy: A Hybrid Constitutive Modeling Approach","authors":"Shuangbo Li, Lihua Zhan, Hao Xie, Youliang Yang, Zili Wang, Quanqing Zeng, Yi Xiong","doi":"10.1007/s12540-025-02156-7","DOIUrl":"10.1007/s12540-025-02156-7","url":null,"abstract":"<div><p>This study systematically investigates the combined effects of pre-deformation and natural aging (NA) on the creep aging (CA) behavior of 2A14 aluminum alloy, aiming to optimize the forming precision and mechanical properties of aerospace load-bearing components. Experimental and computational analyses demonstrate that pre-deformation significantly suppresses NA-induced hardening, with higher pre-strain levels (0%, 4%, 8%) accelerating the attainment of peak NA strength. CA tests conducted at varying pre-strain levels revealed that pre-deformation significantly enhances both creep strain and creep rate while mitigating the effects of NA. Microstructural characterization via XRD and TEM demonstrated that pre-deformation promotes <span>(theta^{prime })</span> phases and increases dislocation density, thereby contributing to improved yield strength. To address the limitations of conventional constitutive models in predicting multi-parameter creep behavior, we developed a hybrid pre-strain and NA coupled (PNC) model integrated with a particle swarm optimization long short-term memory (PSO-LSTM) network. The PSO-LSTM-PNC model achieves superior prediction accuracy and computational efficiency, effectively correcting significant deviations in the initial creep stage and under specific process conditions. This approach bridges the gap between physical mechanisms and data-driven modeling, providing a robust framework for optimizing CA processes under complex thermomechanical conditions.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div><div><p>Scheme 1. Systematic investigation of synergistic effects of pre-deformation and natural aging on creep aging behavior in 2A14 aluminum alloy with deep learning-enhanced constitutive </p></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3596 - 3609"},"PeriodicalIF":4.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-temperature Compressive Properties and Microstructural Evolution with Different Solution Temperatures and Cooling Rates for the Ti60 Alloy 不同固溶温度和冷却速率下Ti60合金高温压缩性能及组织演变

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-29 DOI: 10.1007/s12540-025-02161-w

Yuhe Wu, Jiang Li, Fuqian Sun, Tong Wang, Qian Zhao

{"title":"High-temperature Compressive Properties and Microstructural Evolution with Different Solution Temperatures and Cooling Rates for the Ti60 Alloy","authors":"Yuhe Wu, Jiang Li, Fuqian Sun, Tong Wang, Qian Zhao","doi":"10.1007/s12540-025-02161-w","DOIUrl":"10.1007/s12540-025-02161-w","url":null,"abstract":"<div><p>This study examines the effects of solution treatment temperatures (1045 ℃, 1030 ℃, 1015 ℃, 1000 ℃ and 985 °C) and cooling methods (WQ, OQ, AC, FC, OFC) on the high-temperature compressive properties of Ti60. The results show that lower cooling rates reduced high-angle grain boundaries, increased average grain size, and suppressed dynamic recrystallization. Solution temperature regulates <i>β</i>-grain size and Mo content in the <i>β</i> phase: in the <i>β</i> single-phase region, <i>β</i> grains coarsen significantly, while in the <i>α</i> + <i>β</i> phase region, finer equiaxed grains and higher Mo content in <i>β</i> phase are retained. In high-temperature compression, Ti60 alloy exhibits distinct dual-yield behavior, attributed to the competitive interplay between DRX initiation and dislocation-driven deformation, which is absent in high-temperature tension. The more uniform triaxial stress distribution under compressive loading leads to a significantly higher strain hardening rate in compression than in tension. When the solution temperature is ≥ 1030 °C, the compressive yield strength of the material is higher than the tensile yield strength, whereas when the temperature is < 1030 °C, this trend is reversed. Using Response Surface Methodology, 1045 °C solution treatment with 1367 °C/min cooling was identified as the optimal condition, yielding a CYS of 669.13 MPa, a strain hardening exponent <i>n</i> of 0.9325, and an energy dissipation density <i>W</i> of 5.051 × 10<sup>4</sup> kJ/m<sup>3</sup>.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3400 - 3420"},"PeriodicalIF":4.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effects of Loading Directions on Mechanical Behaviors and Dynamic Recrystallization of AZ31 Magnesium Alloys 加载方向对AZ31镁合金力学行为和动态再结晶的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-10 DOI: 10.1007/s12540-025-02158-5

Jiangxia Tian, Lifei Wang, Shi Qiu, Xiaoli Ruan, Bin Xing, Xingwei Fu, Ruidi Li, Kunkun Deng, Zhiyong You, Liuwei Zheng, Hongxia Wang, Jiahu Yang, Kwang Seon Shin

{"title":"The Effects of Loading Directions on Mechanical Behaviors and Dynamic Recrystallization of AZ31 Magnesium Alloys","authors":"Jiangxia Tian, Lifei Wang, Shi Qiu, Xiaoli Ruan, Bin Xing, Xingwei Fu, Ruidi Li, Kunkun Deng, Zhiyong You, Liuwei Zheng, Hongxia Wang, Jiahu Yang, Kwang Seon Shin","doi":"10.1007/s12540-025-02158-5","DOIUrl":"10.1007/s12540-025-02158-5","url":null,"abstract":"<div><p>To examine the effects of different loading directions on mechanical behaviors and dynamic recrystallization of AZ31 magnesium alloy. Uniaxial hot compression experiments were conducted on the original AZ31Mg alloy at 0°, 15°, 30°, 45°, 60°, 75°, and 90° directions on the ND–RD plane. The results show that the sample compressed in the RD direction has a higher degree of dynamic recrystallization, and tensile twins promote the dynamic recrystallization behavior during the hot compression process. There are very few residual twins in the deformed samples. The compression behavior of samples with different orientations on the ND–RD plane shows anisotropy. The yield strength of the samples decreases first and then increases with the increase of the angle. The mechanical behavior of samples with different orientations shows anisotropy. The dynamic recrystallization mechanism of the samples is not affected by the spatial orientation. The dynamic recrystallization mechanism of the 0°, 45°, and 90° samples is all continuous dynamic recrystallization.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3346 - 3363"},"PeriodicalIF":4.5,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Cooling Rate of Solution Treatment on High-Temperature Creep Properties of Ti60 Alloy Rolled Plate 固溶冷却速率对Ti60合金轧制板高温蠕变性能的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-10 DOI: 10.1007/s12540-025-02163-8

Zhen Gong, Shulin Dong, Zhiyong Chen, Shibing Liu, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang

{"title":"Effect of Cooling Rate of Solution Treatment on High-Temperature Creep Properties of Ti60 Alloy Rolled Plate","authors":"Zhen Gong, Shulin Dong, Zhiyong Chen, Shibing Liu, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang","doi":"10.1007/s12540-025-02163-8","DOIUrl":"10.1007/s12540-025-02163-8","url":null,"abstract":"<p>Solution aging treatment is the main strengthening method to improve the properties of Ti60 alloy. However, the high-temperature creep behavior and microstructure of Ti60 alloy are extremely sensitive to the cooling rate during high-temperature solution treatment. Therefore, to investigate the effect of microstructural changes caused by cooling rate on creep strain rate and fracture life, this study conducted high-temperature tensile creep tests at 650 °C–200 MPa on Ti60 alloy rolled plates with different cooling rates of solution treatment. It was found that the slower the cooling rate, the longer the creep life. Compared with the origin Ti60 alloy, the creep life of samples treated by water cooling, air cooling, and furnace cooling after solution treatment increased from 17.9 h to 150.8 h, 319.9 h, and 498.8 h, respectively. It was also found that slow cooling (furnace cooling) facilitates the comprehensive development of α phase, reduces high-angle grain boundaries, and forms coarser lamellar grains, thereby significantly improving the creep performance of the material. In contrast, fast cooling (air cooling) produces abundant ∑33c twin boundaries, which promote grain boundary sliding, rotation, and atomic diffusion. This not only accelerates the initiation of microcracks but also serves as the starting point for material failure.</p>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3552 - 3563"},"PeriodicalIF":4.5,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure and Mechanical Properties of Gas Tungsten Arc Welded Al0.3CoCrFeNi High Entropy Alloy To AISI 316 L Austenitic Stainless Steel Al0.3CoCrFeNi高熵合金与AISI 316l奥氏体不锈钢气体钨电弧焊的组织与力学性能

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-10 DOI: 10.1007/s12540-025-02167-4

Yasam Palguna, A. Rajesh Kannan, N. Siva Shanmugam, J. P. Oliveira, Rajesh Korla

{"title":"Microstructure and Mechanical Properties of Gas Tungsten Arc Welded Al0.3CoCrFeNi High Entropy Alloy To AISI 316 L Austenitic Stainless Steel","authors":"Yasam Palguna, A. Rajesh Kannan, N. Siva Shanmugam, J. P. Oliveira, Rajesh Korla","doi":"10.1007/s12540-025-02167-4","DOIUrl":"10.1007/s12540-025-02167-4","url":null,"abstract":"<div><p>High entropy alloys (HEAs) are widely preferred for structural applications due to their superior mechanical properties. Their industrial use will depend on the integration with other materials, where dissimilar joining will be fundamental. In this work, sound dissimilar joints between Al<sub>0.3</sub>CoCrFeNi HEA and austenitic 316L stainless steel were obtained using gas tungsten arc welding. Microstructural characterization revealed the existence of a single-phase FCC structure in the fusion zone (FZ) of the joint, while the nucleation of the B2/BCC phase was noticed after imposing a post-weld heat treatment (PWHT). In the as-welded condition, hardness measurements confirmed the existence of a softening effect at the FZ compared to the original parent metals as a result of the coarse columnar dendritic growth. The dissimilar joint exhibited a decrease in tensile strength and ductility; however, this was significantly improved after the implementation of post-weld heat treatment. These outcomes suggest that these joints, especially after post-weld heat treatment, are suitable for structural applications.</p><h3>Graphical Abstract</h3><p>Gas tungsten arc welding of Al0.3CoCrFeNi high entropy alloy to AISI 316L austenitic stainless steel</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3579 - 3595"},"PeriodicalIF":4.5,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature Dependence of Creep Deformation and Microfracture Behavior of Aged T91 Steel Using Small Punch Creep Test 用小冲孔蠕变试验研究时效T91钢蠕变变形和微断裂行为的温度依赖性

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-10 DOI: 10.1007/s12540-025-02165-6

Thanh Tuan Nguyen, Kee Bong Yoon, Anh Dung Ha, Young Wha Ma

{"title":"Temperature Dependence of Creep Deformation and Microfracture Behavior of Aged T91 Steel Using Small Punch Creep Test","authors":"Thanh Tuan Nguyen, Kee Bong Yoon, Anh Dung Ha, Young Wha Ma","doi":"10.1007/s12540-025-02165-6","DOIUrl":"10.1007/s12540-025-02165-6","url":null,"abstract":"<div><p>This study investigates the applicability of the small punch creep (SPC) test for evaluating the creep properties and remaining service life of thermally aged T91 steel. Experimental campaigns were conducted over the temperature range of 550 °C to 650 °C to characterize the temperature-dependent creep deformation and microfracture mechanisms. The SPC results revealed a typical three-stage creep behavior, which was comparable to that observed in miniature tensile creep tests. A Norton–Bailey-type creep constitutive model was formulated using SPC-derived equivalent stress and strain rate data, showing excellent agreement with both SPC and miniature uniaxial tensile creep results. Fracture consistently initiated via circumferential cracking in the tensile-dominated region on the specimen's lower surface, characterized by significant localized thinning and a high density of creep voids, while the upper compressive region near the punch interface remained entirely void-free. Creep life assessment based on the Larson–Miller Parameter (LMP) demonstrated good correlation between SPC and reference data, confirming the reliability of the method for life prediction. Although thermally aged T91 exhibited a moderate reduction in creep rupture strength and activation energy due to microstructural degradation, SPC tests consistently predicted longer rupture lives than uniaxial tests, highlighting the need for appropriate correlation factors when applying SPC data for engineering assessment.</p><h3>Graphical Abstracts</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 10","pages":"3379 - 3399"},"PeriodicalIF":4.5,"publicationDate":"2026-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148950488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Mechanical Properties and Dynamic Recrystallization Behaviour of Hot Rolled Al-4.5Cu/TiB2 Composites 热轧Al-4.5Cu/TiB2复合材料力学性能和动态再结晶行为的增强

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-04-01 DOI: 10.1007/s12540-025-02178-1

Lokesh Nair, Pradeep Kumar Jha, Indra Vir Singh

{"title":"Enhanced Mechanical Properties and Dynamic Recrystallization Behaviour of Hot Rolled Al-4.5Cu/TiB2 Composites","authors":"Lokesh Nair, Pradeep Kumar Jha, Indra Vir Singh","doi":"10.1007/s12540-025-02178-1","DOIUrl":"10.1007/s12540-025-02178-1","url":null,"abstract":"<p>This study examines the effect of TiB<sub>2</sub> contents (4wt%, 8wt%, and 12 wt%) and hot rolling strain (50% and 75%) on microstructural evolution and mechanical performance of in-situ Al-4.5Cu/TiB<sub>2</sub> composites. The composites were synthesized using stir casting assisted by the mixed salt reaction and followed by hot rolling at 450 °C. In-situ developed TiB<sub>2</sub> particle were uniformly distributed throughout the composite, and grain refinement was achieved due to combined effect of TiB<sub>2</sub> reinforcement and hot rolling. Highest recrystallized grain fraction (31.4%) in the composite was achieved at 8% TiB<sub>2</sub> at 50% rolling reduction, with recrystallization diminishing at higher strain levels. At 8% of TiB<sub>2,</sub> the composite exhibited an increase of 23% in UTS and 50% increase in microhardness compared to base alloy. Hot rolling at 75% reduction results improvement of UTS by 38% compared to as-cast composite resulting in an overall enhancement of 71% over the base alloy. Microhardness also improved by 20% compared to as-cast composite with an overall increase of 81% compared to the base alloy. These findings highlight the synergistic effect of TiB<sub>2</sub> content and hot rolling in tailoring the microstructure and mechanical behavior of in-situ synthesized Al-4.5Cu/TiB<sub>2</sub> composites.</p>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 11","pages":"3935 - 3954"},"PeriodicalIF":4.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149176457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superior Strength and Temperature-Dependent Deformation Mechanisms of NiCrPd Single-Phase Medium-Entropy Alloy NiCrPd单相中熵合金优异的强度和温度相关变形机制

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-22 DOI: 10.1007/s12540-025-02153-w

Meiling Liang, Haoyan Meng, Yanxin Li, Jingbo Qiao, Peter K. Liaw, Yang Tong, Shuying Chen, Fanchao Meng

{"title":"Superior Strength and Temperature-Dependent Deformation Mechanisms of NiCrPd Single-Phase Medium-Entropy Alloy","authors":"Meiling Liang, Haoyan Meng, Yanxin Li, Jingbo Qiao, Peter K. Liaw, Yang Tong, Shuying Chen, Fanchao Meng","doi":"10.1007/s12540-025-02153-w","DOIUrl":"10.1007/s12540-025-02153-w","url":null,"abstract":"<div><p>The study investigates a NiCrPd single-phase face-centered cubic (FCC) medium-entropy alloy (MEA) that demonstrates significantly superior strength compared to the extensively studied NiCoCr alloy across temperatures ranging from cryogenic (77 K) to elevated temperatures (1073 K). The alloy exhibits exceptional yield strength of over 700 MPa at 77 K and maintains approximately 580 MPa at room temperature and 400 MPa at 873 K while maintaining substantial ductility (~ 0.35), representing significant improvements over comparable medium-entropy systems. The deformation mechanisms are highly temperature-dependent: mechanical twinning dominates at cryogenic temperatures due to reduced stacking fault energy (SFE), while dislocation slip becomes predominant at room and elevated temperatures, with systematic dislocation analysis identifying Burgers vectors of <span>(:frac{1}{2})</span>[01<span>(bar{1})</span>] and <span>(:frac{1}{2})</span>[101]. Theoretical calculations based on atomic size and modulus mismatch models accurately predict the experimental yield strength (582 MPa predicted vs. 580 MPa measured), validating the predictive capability for MEA design. These findings provide fundamental insights into structure–property relationships and temperature-dependent deformation mechanisms in advanced metallic materials.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"2991 - 3004"},"PeriodicalIF":4.5,"publicationDate":"2026-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0