Journal of Materials Research and Technology-Jmr&t最新文献

{"title":"Enhanced dissimilar aluminum alloy joints using 0.1 mm offset in refill friction stir spot welding","authors":"José Francisco Caldeira Maranho ,&nbsp;Fan Cui ,&nbsp;Huawei Tang ,&nbsp;Xiaosong Feng ,&nbsp;Hao Luan ,&nbsp;Junjun Shen ,&nbsp;Witor Wolf ,&nbsp;Brenda Juliet Martins Freitas ,&nbsp;Wenya Li ,&nbsp;Nelson Guedes de Alcântara ,&nbsp;Jorge Fernandez dos Santos ,&nbsp;Benjamin Klusemann ,&nbsp;Guilherme Yuuki Koga","doi":"10.1016/j.jmrt.2025.03.200","DOIUrl":"10.1016/j.jmrt.2025.03.200","url":null,"abstract":"<div><div>5A06-O and 2219-T87 aluminum alloys are promising candidates for propellant tanks. In this study, refill friction stir spot welding (refill FSSW) with a 0.1 mm offset was applied to produce defect-free 5A06-O/2219-T87 welds. A Box-Behnken method and statistical analysis were used to optimize the processing parameters, by determining the influence of welding parameters on lap shear strength (LSS). Plunge depth was the most influential parameter on LSS. All joints failed through the weld seam, including those tested at −55 °C. Microhardness measurements showed a slight increase in the 5A06 sheet over time, while the 2219 sheet exhibited significant hardness reduction. Microstructural analysis revealed typical features of refill FSSW, including a heat-affected zone, thermo-mechanically affected zone, stir zone, hook, and joint-line remnants. Novel findings include the identification of an onion structure in the welds, characterized by fine equiaxed grains and nanoprecipitates that contribute to weld's hardness. This unique microstructure, formed under the thermal and mechanical conditions of the FSSW process, strengthens the material and enhances its mechanical performance. Stop-action tests provided insights into material flow and microstructural evolution during welding. While conventional refill FSSW could not produce defect-free welds, the findings highlight the potential of the 0.1 mm offset refill FSSW to enhance weld quality, supporting its application in aerospace components requiring high mechanical integrity across extreme temperature ranges.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1091-1104"},"PeriodicalIF":6.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Correlation between microstructures and mechanical properties of super-sized new-energy automobile structural component formed by vacuum HPDC process","authors":"Minjie Huang ,&nbsp;Jufu Jiang ,&nbsp;Ying Wang ,&nbsp;Tianxiang Qin ,&nbsp;Xiaodong Zhang ,&nbsp;Jian Dong ,&nbsp;Jingbo Cui ,&nbsp;Lingbo Kong ,&nbsp;Chenggang Wang","doi":"10.1016/j.jmrt.2025.03.198","DOIUrl":"10.1016/j.jmrt.2025.03.198","url":null,"abstract":"<div><div>Correlation between microstructures and mechanical properties of a super-sized new-energy automobile rear floor component (three-dimensional size: 1842 mm × 1549 mm × 741 mm, projected area: 2.85 m², largest projected area in available reports) manufactured by vacuum high-pressure die casting (HPDC) process using a non-heat treated aluminum alloy was clarified. Effects of filling behavior and solidification sequence during HPDC on microstructures and mechanical properties of various regions for the HPDC component were unraveled. According to filling and solidification characteristic, 5 regions of the HPDC component were selected for evaluation. Rear floor platform region exhibits high comprehensive mechanical properties. The yield strength (YS) and ultimate tensile strength (UTS) for various locations are higher than 146 MPa and 252 MPa, respectively, while average elongation (EL) reaches 8.60 %. High YS in this region is attributed to fine-grained structure formed at rapid solidification condition. Utilizing local loading and feeding strategy, fine and dense microstructure was successfully obtained in longitudinal beam region, which guarantees excellent strength and plasticity (UTS and EL near local loading and feeding area reach 226.86 MPa and 10.41 %). Low filling velocity in wheel housing region increases the residence time of the melt in die cavity and promotes nucleation and growth of Fe-rich phase, while sluggish solidification causes the further coarsening of Fe-rich phase, resulting in degradation of elongation. Agglomeration of grains under turbulent flow condition during die filling and slow cooling condition in horizontal support column region cause abnormal growth of externally solidified crystals (ESC) grains, which is detrimental to ductility.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1146-1159"},"PeriodicalIF":6.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Quantitative microstructural characterization–Based calculation of the relationship between regional yield strength and microstructure in back–Extruded Mg–Gd–Y–Zr alloy cups","authors":"Honggang Duan ,&nbsp;Yonghua Huang ,&nbsp;Xuemei Sun ,&nbsp;Xiaoyu Wang ,&nbsp;Xingrong Chu ,&nbsp;Wenke Wang ,&nbsp;Wenzhen Chen","doi":"10.1016/j.jmrt.2025.03.196","DOIUrl":"10.1016/j.jmrt.2025.03.196","url":null,"abstract":"<div><div>This study quantitatively investigates the relationship between regional yield strength and microstructure in Mg–9Gd–5Y–0.5Zr (wt.%) alloy cups formed by backward extrusion. A refined GM–HP model was developed, incorporating texture, grain boundary, and dislocation strengthening to accurately predict the compressive yield strength across different regions, accounting for microstructural heterogeneity. The microstructure exhibits significant diversity, driven by variations in the deformation path and dynamic recrystallization (DRX), transitioning from a mixed-grain microstructure with &lt;0001&gt;//ED texture to fully recrystallized fine grains in the corners, followed by grain coarsening in the walls. Microstructural analysis reveals that basal &lt;a&gt; slip is the predominant deformation mechanism, with prismatic &lt;a&gt; slip serving as a secondary contributor. The orientation factor <em>M</em>, strongly influenced by texture, reaches a maximum value of ∼3.3 under the &lt;0001&gt;⊥ED texture. Geometrically necessary dislocations (GNDs) exhibit an inverse correlation with DRX, with values ranging from 0.55 to 2.75 × 10¹⁴ m⁻². The GM–HP model reveals that grain boundary strengthening contributes 50–70 % of total yield strength, and highlights the significant hardening of &lt;0001&gt;⊥ED texture and GNDs. These findings provide valuable insights for optimizing the microstructural design and plastic deformation processing of magnesium alloy.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1115-1123"},"PeriodicalIF":6.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Softening suppression and property improvement by laser pretreatment of FSW AA6061 aluminum alloy","authors":"Ning Wang ,&nbsp;Chunzhi Zhang ,&nbsp;Dong Zhang ,&nbsp;Shufeng Zhao ,&nbsp;Qi Liu ,&nbsp;Lijun Zhang","doi":"10.1016/j.jmrt.2025.03.187","DOIUrl":"10.1016/j.jmrt.2025.03.187","url":null,"abstract":"<div><div>The thermal history associated with welding processes often leads to softening in aluminum alloys, negating their lightweight advantage. To counteract this, this study employs a novel pretreatment strategy using laser beam welding (LBW) prior to friction stir welding (FSW) in AA6061 aluminum alloy. The laser pretreatment, through its high energy density and rapid cooling, promotes grain refinement, creating a greater number of high-angle grain boundaries, and induces the precipitation of fine AlFeMnSi phases. This not only forms a more refined microstructure but also improves uniformity through recrystallization and precipitate pinning effects, which significantly enhances the strength and hardness of the FSW joints. Electron backscatter diffraction (EBSD) analysis revealed that the average grain size in the nugget zone of the pretreated FSW joint was 0.95 μm, which is 32.6 % smaller than the 1.41 μm observed in the conventional FSW joint. This investigation demonstrates an effective approach for achieving robust welds in aluminum alloys, potentially enhancing their application in various industries.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1124-1129"},"PeriodicalIF":6.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Development and characterization of minimal surface tantalum scaffold with high strength and superior fatigue resistance","authors":"Xiaojun Ni ,&nbsp;Qingbao Sun ,&nbsp;Jiaxiang Wang ,&nbsp;Dachen Zhang ,&nbsp;Xia Jin ,&nbsp;Qiang Yang ,&nbsp;Luyuan Chen ,&nbsp;Jingzhou Yang ,&nbsp;Yonglong Hong","doi":"10.1016/j.jmrt.2025.03.108","DOIUrl":"10.1016/j.jmrt.2025.03.108","url":null,"abstract":"<div><div>Additively manufactured tantalum scaffolds show great promise for load-bearing bone reconstruction due to their exceptional osseointegration and bone in-growth capabilities. Nonetheless, enhancing their mechanical properties, particularly fatigue resistance, remains a critical goal. This study highlights the remarkable mechanical properties of additively manufactured triple periodic minimal surface (TPMS) porous tantalum scaffolds. With a porosity of 70 %, the TPMS tantalum scaffold exhibits a compressive yield strength of 57.6 MPa, surpassing trabecular porous structures with identical porosity by over 70 % and the rhombic dodecahedron (RDOD) structure by over 30 %. Furthermore, its elastic modulus reaches 7.3 GPa, marking a 95 % increase compared to RDOD and trabecular tantalum scaffolds. Notably, this scaffold demonstrates impressive ductility, with no macroscopic brittle fractures even at a maximum strain of 50 %. During static compression, the tantalum scaffold structure showcases a layer-by-layer deformation failure mechanism, leading to a substantial rise in dislocation density and low-angle grain boundaries within the grain regions. This suggests that the failure mechanism primarily arises from plastic deformation and ductile fracture in tantalum materials. The TPMS tantalum scaffold displays excellent fatigue resistance without mechanical fracture failure, maintaining its residual compression yield strength post-testing, unlike the RDOD tantalum scaffold which experiences fatigue failure with a strength of 26 MPa. The TPMS porous structure exhibits superior stress distribution and reduced stress concentration compared to the RDOD design, resulting in enhanced mechanical performances. Given its exceptional mechanical properties, the TPMS tantalum scaffold holds significant potential for clinical applications as load-bearing bone implants.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1226-1239"},"PeriodicalIF":6.2,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Optimization of microstructure and properties of high-silicon aluminum alloys for electronic packaging based on semi-solid thixotropic forming process","authors":"Shenao Jiang ,&nbsp;Tao Jiang ,&nbsp;Wei Yu ,&nbsp;Yong Li ,&nbsp;Wanshun Zhang ,&nbsp;Yonghui Sun ,&nbsp;Hongyang Zhao","doi":"10.1016/j.jmrt.2025.03.194","DOIUrl":"10.1016/j.jmrt.2025.03.194","url":null,"abstract":"<div><div>This study utilizes a semi-solid thixotropic forming strategy to achieve plastic deformation of Al–50Si alloy, optimizing its microstructure and properties. Various techniques, including large-area EBSD stitching, SEM, nanoindentation, and hardness testing, are used to investigate the alloy's recrystallization behavior, texture evolution, and stress distribution. The results highlight the mechanisms responsible for the microstructural changes and the enhancement of mechanical properties. Following thixotropic forming, the coarse Si phases within the alloy are fragmented. The average size of the primary Si particles decreases from 122.88 μm to 17.33 μm, a reduction of 85.90 %. Due to the synergistic effects of multiple mechanisms during forming process, the alloy's hardness increases from 81.29 HV to 155.83 HV, a 91.70 % improvement. The effectiveness of the strengthening strategy is further confirmed through ROM and Turner model analyses. Overall, this study demonstrates the feasibility of applying semi-solid forming techniques to fabricate Al–50Si materials. Not only does this approach expand the processing window for high-silicon aluminum alloys, but it also offers new insights into optimizing the microstructure and properties of difficult-to-deform materials.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1194-1201"},"PeriodicalIF":6.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Effect of compound addition of Ti–B on hardenability and hot ductility of 22MnB5 hot stamped steel","authors":"Yaxu Zheng ,&nbsp;Long Zhang ,&nbsp;Yu Lin ,&nbsp;Jing Wang ,&nbsp;Kun Wang ,&nbsp;Zhihong Guo ,&nbsp;Ruifang Cao ,&nbsp;Liguang Zhu ,&nbsp;Bo Wang ,&nbsp;Di Zhang ,&nbsp;Jie Feng","doi":"10.1016/j.jmrt.2025.03.189","DOIUrl":"10.1016/j.jmrt.2025.03.189","url":null,"abstract":"<div><div>Hot stamped 22MnB5 steel has been widely used in the automotive industry due to its high strength and good toughness. At present, most hot stamped steels improve their hardenability and strength by incorporating trace amount of boron and titanium. In order to obtain excellent hardenability, the effects of boron content and austenitization temperature on the hardenability of Ti bearing 22MnB5 steel have been studied. Additionally, in order to reduce the cracking susceptibiltiy during hot stamping process, the effects of boron content and deformation rate on the hot ductility of 22MnB5 steel have also been investigated. The influence mechanism of microstructures and precipitates on both hardenability and hot ductility has also been discussed. The results suggest that the hardenability of low boron steel (8 ppm boron) is improved gradually, while that of high boron steel (35 ppm boron) is deteriorated suddenly with increasing quenching temperature from 850 °C to 1000 °C. The reason is that there should be a suitable solid solution boron content in austenite to obtain excellent hardenability performance. Too much borides dissolve in the austenite will result in excessive segregation of boron atoms at the grain boundaries and reprecipitation of new borides which deteriorate the hardenability. The low boron and high boron steels both have good hot ductility with strain rates of 0.05s⁻¹ and 0.5s⁻¹, and the section area reductions are all above 80 %, hence there are no hot cracks during hot stamp process. The addition of boron promotes the nucleation and precipitation of Ti(C,N), and boron can also occupy vacancies at grain boundaries and around precipitates to reduce the diffusion rates of C, N, and Ti, thus refine the carbides and the grains of high boron steel. The smaller the grain size, the poorer the hardenability of the high boron steel.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1173-1193"},"PeriodicalIF":6.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Effects of bedding angle and confining pressure on the mechanical behavior, energy dissipation and micro damage evolution mechanism of layered rock mass under triaxial compression conditions","authors":"Yaoyao Meng ,&nbsp;Liyuan Yu ,&nbsp;Liang Yuan ,&nbsp;Xinzhu Hua ,&nbsp;Yankun Ma ,&nbsp;Jiantao Zhuang ,&nbsp;Hongwen Jing ,&nbsp;Xiaowei Liu","doi":"10.1016/j.jmrt.2025.03.191","DOIUrl":"10.1016/j.jmrt.2025.03.191","url":null,"abstract":"<div><div>To reveal the anisotropy characteristics of mechanical behavior, energy evolution and fracture morphology of the layered rock mass during triaxial compression tests, MTS 815 mechanical test system is used to perform the relevant experimental studies on layered rock mass specimens with different bedding angles and confining pressures by combining energy analysis and CT scanning. Effects of bedding angle and confining pressure on the energy evolution characteristics of layered rock masses are deeply studied. With increasing bedding angle, the elastic energy, dissipative energy and total energy at the peak strength showed two changing trends: first increase and then decrease and then increase, first decrease and then increase. With increasing confining pressure, the anisotropy coefficient of elastic energy first decreases and then increases, the anisotropy coefficient of dissipative energy first decreases and then increases, and the anisotropy coefficient of total energy first increases and then decreases and then increases. The sensitivity of dissipative energy at peak strength to bedding angle is the highest and the sensitivity of elastic energy is the lowest. Micro-cracks reconstruction and quantitative characterization are first used to reveal the mechanism of confining pressure on the failure modes of layered rock specimens. At bedding angle = 45°, the two-dimensional crack area rate first increases and then decreases along the change of specimen height. When the confining pressure is 10 MPa, the dispersion degree of two-dimensional crack distribution along the specimen height is the largest, and the dispersion degree of two-dimensional crack along the specimen height is the least at 20 MPa.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1259-1272"},"PeriodicalIF":6.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143703922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Origin of additive manufactured ultrafine stainless steel composites","authors":"Brenda Juliet Martins Freitas ,&nbsp;Guilherme Yuuki Koga ,&nbsp;Sergio de Traglia Amancio-Filho ,&nbsp;Claudemiro Bolfarini","doi":"10.1016/j.jmrt.2025.03.192","DOIUrl":"10.1016/j.jmrt.2025.03.192","url":null,"abstract":"<div><div>Cracking, anisotropy, texture, brittleness, coarse-reinforcing particles, and columnar grains often characterize ultrahigh small-radii-containing alloys processed via additive manufacturing. In this study, we demonstrate how Laser Powder Bed Fusion (L-PBF) processing, combined with massive boron addition (&gt;1000 ppm), enables the formation of a refined and complex microstructure composed of an ultrafine stainless steel matrix and nanoborides decorating grain boundaries (GBs). Boron in L-PBF-produced stainless steel effectively transforms coarse columnar grains (∼200 μm) into equiaxed ultrafine grains (∼1 μm). Beyond exceptional grain refinement, colossal boron content promotes the formation of nanometric Cr₂B particles along GBs. Such surprising grain refinement arises from the extended thermal undercooling caused by a lag between the real and theoretical grain growth rate caused by the segregation of boron, forming a boundary layer ahead of the solid-liquid interface. This extended undercooling increases the nucleation rate on the underlying layer, suppressing the columnar-like grain growth of the primary phase. These findings provide a mechanistic understanding of grain refinement in boron-modified alloys, offering insights that are transferable to other materials and additive manufacturing conditions.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1077-1090"},"PeriodicalIF":6.2,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Corrosion behavior of AlZnMgCu/TiB2 composites prepared via the in-situ generation of TiB2","authors":"Jianjun Wang ,&nbsp;Ziyu He ,&nbsp;Xiaogang Li ,&nbsp;Kai Lu ,&nbsp;Xiao Wang ,&nbsp;Lu Li ,&nbsp;Zhentao Yuan ,&nbsp;Zhaolin Zhan ,&nbsp;Wenshen Tang","doi":"10.1016/j.jmrt.2025.03.183","DOIUrl":"10.1016/j.jmrt.2025.03.183","url":null,"abstract":"<div><div>AlZnMgCu/TiB₂ composites are prepared via the in-situ generation of TiB₂ ceramic particles and subjected to hot extrusion and heat-treatment. XRD, SEM, EDS and TEM are used to characterize the composition, lattice structure and distribution of the secondary phases. The corrosion behavior of the composites is studied by electrochemical impedance spectroscopy, potential polarization measurements and corrosion morphology analysis. The effects of MgZn₂ and Al₂Cu precipitated phases and TiB₂ ceramic particles on the corrosion behavior are discussed. The results show that the TiB₂ ceramic particles are distributed along the extrusion direction and grain boundaries. Nano-sized MgZn₂ and Al₂Cu precipitates are evenly distributed in the α-Al matrix and form large grain boundary precipitates, resulting in precipitation-free zones. The corrosion of the composites is mainly pitting and intergranular corrosion. The pitting corrosion occurs in the α-Al matrix around TiB₂ ceramic particles and the θ phase. Two-electrode coupling systems are formed in the presence of TiB₂ ceramic particles, which explain the mechanism behind the reduced corrosion of the α-Al matrix.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"36 ","pages":"Pages 1017-1027"},"PeriodicalIF":6.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}