Journal of Materials Science & Technology最新文献

{"title":"Evolution of oxide nanoparticles during thermomechanical processing and its influence on mechanical properties of a 12Cr ODS alloy","authors":"Haobo Ma, Jing Li, Yongli Wang, Jiawei Wang, Shi Liu, Liangyin Xiong","doi":"10.1016/j.jmst.2024.12.049","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.049","url":null,"abstract":"A Fe-12Cr-2W-0.2Zr-0.1Ti-0.35Y₂O₃ ODS ferritic alloy was prepared by ball milling, hot isostatic pressing (HIP) and thermomechanical processing herein. The evolution of oxide nanoparticles (ONPs) with different intermediate annealing temperatures of thermomechanical processing and its effect on microstructure and mechanical properties of the ODS alloy were investigated. The result shows that the intermediate annealing temperatures played a decisive role in the size, morphology and structure of nanoparticles in the final alloy since this was attributed to the fact that fine particles were dissolved through dislocation shearing during cold deformation and then re-precipitated during subsequent heat treatment. The high intermediate annealing temperature promotes the growth of the near-spherical ONPs, while the ellipsoidal nanoparticles are developed at relatively low temperature. Meanwhile, the structural change of the ONPs was also facilitated by the dissolution-reprecipitation behavior. The predominant Y₂(Zr<em>_y</em>Ti₁₋<em>_y</em>)₂O₇ with cubic pyrochlore phase in as-HIPed alloy can be transformed into Y₄Zr₃O₁₂ particles with rhombohedral structure during the thermomechanical treatment. However, compared with the change in size of ONPs, the change in morphology and structure of ONPs has no obvious influence on the mechanical strength. Different intermediate annealing temperatures play a different role in the coarsening of ONPs during thermomechanical treatment, which makes the alloy annealed at low temperature exhibiting more uniform distribution of ONPs and better mechanical properties.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"50 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463083","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":"Anomalous temperature-dependent strength and the operative slip modes in an extruded Mg-Y sheet","authors":"Yingbo Zhang, Ran Ni, Carl J. Boehlert, Bo Chen, Yanqin Chai, Bo Gao, Hao Zhou, Qudong Wang, Dongdi Yin","doi":"10.1016/j.jmst.2024.12.048","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.048","url":null,"abstract":"This work is intended to further understand the controversial temperature dependencies of various slip modes in Mg alloys, and their effects on the mechanical properties at high temperature (HT). A systematical and statistical investigation on the temperature-dependent macroscopic deformation behavior and the corresponding grain-scale slip activity was performed for both an extruded Mg-10Y (wt.%) sheet and a pure Mg sheet during tension at 25–300 °C. The alloy's strength increased by up to 44 MPa (14.0%) at HT compared to that at 25 °C and this was accompanied by decreased pyramidal II &lt;c+a&gt; slip activity; both phenomena were opposite to that for pure Mg. The critical resolved shear stress (CRSS) ratios were estimated based on the ∼1700 sets of observed slip traces, and a positive temperature-dependent CRSS_{pyr II}/CRSS_bas was found in Mg-10Y. Compared to pure Mg, Mg-10Y exhibited pronounced strain hardening at HT due to enhanced slip-slip interactions, including multiple slip and cross slip, increased GND accumulation, and Y solute-dislocation interactions. The significant pyramidal II &lt;c+a&gt; slip activity (up to 30% frequency), its thermal hardening and pronounced strain hardening nature are proposed to be the key mechanisms for the observed anomalous strength increase in Mg-10Y. The grain-scale experimental evidence for &lt;c+a&gt; dislocation activity and its correlation to mechanical properties were revealed in this study and compared to recent atomic-scale simulations.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"50 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452233","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":"Side reactions in photocatalytic H2 production by overall water splitting","authors":"Chuanbiao Bie, Chenchen Jiang, Jindi Yang, Xin Sun, Xiangkang Zeng, Jianjun Zhang, Bicheng Zhu","doi":"10.1016/j.jmst.2024.12.047","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.047","url":null,"abstract":"The inefficiency of photocatalytic overall water splitting is well documented and has been extensively studied. However, a crucial aspect of this process, the side reaction, has often been overlooked. In this study, we investigate the impact of side reactions on photocatalytic overall water splitting by monitoring factors such as dissolved oxygen, reactive oxygen species, and hydrogen peroxide. Further insights into the side reaction are obtained through the introduction of a platinum cocatalyst. Our findings reveal that dissolved oxygen significantly contributes to the side reaction by promoting the production of hydrogen peroxide. This byproduct is generated at the expense of electrons needed for the hydrogen evolution reaction, thereby reducing the overall efficiency of photocatalytic water splitting. This article aims to provide guidance on future research directions in the field of water splitting, with a particular emphasis on photocatalysis.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"23 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452275","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":"Effects of spark plasma sintering parameters on sintering mechanism of yttrium hydride","authors":"Xuyang Shang, Yuxin Lin, Keke Hou, Yajuan Zhong, Changqing Cao, Yanhui Wang, Hongtao Zeng, Jun Lin","doi":"10.1016/j.jmst.2025.01.013","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.013","url":null,"abstract":"Yttrium hydride (YH<em>_x</em>) is a highly promising neutron moderator material for nuclear reactors, known for its exceptional thermal stability and high hydrogen content. This study investigated the sintering mechanism and microstructural evolution of YH<em>_x</em> monoliths processed by spark plasma sintering (SPS), with the effects of temperature, duration, and pressure. The results indicate that the sintering process can be divided into five stages: formation of sintering necks, rapid densification, anti-densification, recrystallization, and grain growth. The anti-densification behavior is attributed to hydrogen desorption, phase transformation-induced volumetric contraction, and vacancy coalescence from hydrogen migration, leaving residual pores and lattice defects. Furthermore, increasing the sintering temperature and duration promotes recrystallization and grain growth, whereas elevated pressure effectively suppresses grain boundary migration. This research establishes fundamental processing-structure correlations critical for optimizing YH<em>_x</em> moderators in nuclear applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"15 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452230","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":"Self-adaptive lubricating behavior of VAlN/Ag multi-layer coating at simulated operating conditions","authors":"Yupeng Zhang, Zhenyu Wang, Yan Zhang, Xiaojing Bai, Shenghao Zhou, Hao Li, Yong Cheng, Aiying Wang, Peiling Ke","doi":"10.1016/j.jmst.2025.01.014","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.014","url":null,"abstract":"Solid lubricating coatings play a crucial role in preventing friction and wear failure of the hot-end sliding components in aviation engines. In this study, VAlN/Ag multi-layer coatings with excellent interfacial matching were fabricated using a hybrid magnetron sputtering technique. The type and energy of discharge plasmas were analyzed to comprehend their effects on depositing coatings. The coatings exhibit self-adaptive lubrication properties during the designed consecutive friction with stepwise heating from 25 °C to 650 °C. The microstructure evolution during early friction facilitates sufficient tribo-chemical reaction at 650 °C, leading to the formation of a distinctive \"ball-on-rail\" structure that significantly reduces friction coefficient. Based on the first-principles calculations, it was found that the bond energy of Ag−O is lower than that of V−O in both AgVO₃ and Ag₃VO₄, which promotes slipping along the (110) crystal plane and contributes to exceptional tribological properties. The fatigue wear failure mechanism of hard coatings under the thermal-force coupling effects has been elucidated, alongside an exploration of consecutive tribology mechanism at atomic scales over a wide temperature range.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"18 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452235","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":"Dislocation source efficiency and the ductile-to-brittle transition in metals","authors":"Yu-Heng Zhang, Wei-Zhong Han","doi":"10.1016/j.jmst.2025.01.010","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.010","url":null,"abstract":"Metallic materials, although composed of metallic bonds, exhibit a wide range of mechanical properties: some are ductile and deformable, while others undergo a pronounced ductile-to-brittle transition (DBT), displaying ceramic-like brittle behavior once below a critical temperature. For decades, the dominant mechanism driving the ductile-to-brittle transition of metals‒whether dislocation nucleation or dislocation slip‒has been a topic of ongoing debate. A new concept of dislocation source efficiency, however, suggests that both processes are complementary and essential for overall ductile deformation. The relative mobility of screw versus edge dislocations dictates the efficiency of dislocation sources, which in turn governs dislocation multiplication and ultimately the material's ability to plastic deformation. Furthermore, we developed a new model that incorporates factors affecting dislocation activities, such as the initial dislocation density and the number of dislocation sources, offering promising toughening strategies for both metallic structural alloys and ceramics.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"41 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435702","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":"Achieving outstanding room and high-temperature mechanical properties matching in a near α high-temperature titanium alloy with fine lamellar microstructure and nanosilicides","authors":"Shuzhi Zhang, Heqing Zhang, Changjiang Zhang, Xinyu Zhang, Riping Liu","doi":"10.1016/j.jmst.2024.12.046","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.046","url":null,"abstract":"Achieving an optimal balance between room temperature and high-temperature mechanical properties in near-α titanium alloys is a significant challenge. This task requires careful material design and processing strategies, where high-strength ductility synergies can be achieved through severe plastic deformation (SPD) to obtain lamellar structures and well-dispersed nanosilicides. In this study, the alloys exhibited a room temperature tensile strength of 1118.4 MPa and ductility of 15.2%. At 650°C and 700°C, the tensile strengths were 772.5 MPa and 618.7 MPa, with ductility of 20.5% and 48.1%, respectively. Refined primary α lamellae and silicides activate a pyramidal &lt;<em>c</em> + <em>a</em>&gt; slip system during deformation, enhancing room temperature ductilities. At high temperatures, grain boundaries and silicides resist α_p deformation, improving high-temperature strength. These findings provide a crucial theoretical and practical foundation for developing titanium alloys with outstanding mechanical properties at both room and elevated temperatures.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"70 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435701","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":"Impact of scandium on the microstructure, mechanical properties, corrosion behaviors and in-vitro biocompatibility of a Zn-0.1Li alloy","authors":"He Huang, Gencheng Gong, Hui Yu, Zhipei Tong, Qinggong Jia, Liudang Fang, Shaokang Guan, Jing-Jun Nie, DaFu Chen, Jing Bai, Dong Bian, Yufeng Zheng","doi":"10.1016/j.jmst.2025.01.012","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.012","url":null,"abstract":"The poor mechanical properties of pure zinc (Zn) restrain its applications in orthopedics, which requires high loading capacity. Alloying with lithium (Li) element can enhance strength, however, the work-hardening rate is impaired with increased Li content. Here, introducing scandium (Sc) into a low Li-containing Zn-0.1Li alloy could effectively refine its microstructure, reducing the average grain size from 10 to 4 μm. The refinement in microstructure led to a significant improvement in tensile strength, improving from 257 MPa of Zn-0.1Li to 341 MPa of Zn-0.1Li-0.1Sc, meanwhile, the work-hardening rate remained positive during the whole plastic deformation stage. The addition of Sc-impaired elongation is due to numerous microcracks formed at the Zn/ScZn₁₂ interfaces, as well as in the large-sized ScZn₁₂ particles. Corrosion tests revealed an accelerated corrosion rate due to the galvanic effect between the Zn matrix and ScZn₁₂ phase. Even so, the Zn-0.1Li-1.0Sc alloy still exhibited superior biocompatibility with rat/mouse mesenchymal stem cells and close osteogenesis capacity to the original Zn-0.1Li alloy. These findings demonstrated that the addition of Sc in low Li-containing alloys could improve mechanical strength without sacrificing the work-hardening rate and biocompatibility.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"32 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435669","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":"Simultaneous improvement of tensile ductility and fracture strain for dual-phase steels over 1000 MPa","authors":"Jiawei Liang, Dapeng Yang, Zhitong Miao, Tao Wang, Guodong Wang, Hongliang Yi","doi":"10.1016/j.jmst.2025.01.011","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.011","url":null,"abstract":"Fracture strain becomes critical for the local formability and crash performance of carbody components when the tensile strength exceeds 1000 MPa. Regrettably, high-strength quenching and partitioning (Q&amp;P) steels and dual-phase (DP) steels always focus on improving the tensile ductility for stretch formability, while ignoring their limited fracture strain. In this work, we explored a novel strategy, i.e., developing a high fracture strain ferrite-martensite dual-phase steel (HFS-DP) maintaining good strength–ductility balance by suppressing intense strain localization during deformation and enhancing martensite deformability via microstructure design including grain refinement, nano-precipitate hardening in soft ferrite phase, low-carbon and high fraction martensite. HFS-DP demonstrates a remarkable 26% and 47% improvement in tensile ductility and fracture strain, respectively, compared to commercial DP1180 steel with similar ultimate tensile strength. Furthermore, HFS-DP also exhibits a substantial 39% improvement in fracture strain compared to retained austenite-involved commercial QP1180 steel. The detailed processes of strain partitioning, strain localization, and damage formation during deformation were revealed through in-situ scanning electron microscopy (SEM) observation combined with digital image correlation (DIC). The results indicate that the excellent coordinated deformation between ferrite and martensite, coupled with microstructure refinement, effectively suppresses intense strain localization. Moreover, the excellent martensite deformability resulting from the low carbon content also aids in retarding crack formation. This combination effectively suppresses damage initiation and development during deformation, therefore the fracture strain is significantly improved. This study not only contributes to a deeper understanding of the strain localization and damage process during tensile deformation of DP steels, but also provides a new perspective on designing ultrahigh strength steels with high ductility and fracture strain.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"34 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435796","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":"Hot deformation and hot processing behavior of deformable Tip reinforced Mg-5Zn-0.5Ca composite","authors":"Yu Zhang, Kun-kun Deng, Cui-ju Wang, Kai-bo Nie, Quan-xin Shi, Yi-jia Li","doi":"10.1016/j.jmst.2024.12.045","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.045","url":null,"abstract":"The spherical Ti particle (Ti_p) reinforced Mg-5Zn-0.5Ca (Ti_p/ZX50) composite was prepared via the semi-solid stirring casting process and the effects of Ti_p on the hot deformation and hot processing behavior of matrix alloy were investigated through uniaxial hot compression testing. The results indicate that a particle deformation zone (PDZ) forms around the Ti_p with the deformation of the Ti_p/ZX50 composite, which is propitious to the dynamic recrystallization (DRX) of the matrix alloy. The range of the PDZ and the promoting effect of the Ti_p on DRXed nucleation are inversely related to the deformation degree of the Ti_p. Moreover, the deformation of Ti_p alleviates the high stress in the matrix alloy during deformation, expanding the processing range and reducing the average deformation activation energy of the matrix alloy. Notably, the minimum processing temperature (493 K) of the Ti_p/ZX50 composite is significantly lower than that of hardened particle reinforced magnesium matrix composites. The hot deformation mechanism of the Ti_p/ZX50 composite is dislocation climb controlled by both lattice diffusion and pipe diffusion.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"51 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143435670","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}