Journal of Alloys and Compounds最新文献

{"title":"Phase precipitation behavior and mechanical properties of TiVNbTaAlx refractory high-entropy alloys after annealing at medium temperatures","authors":"Yan Long, You Lou, Kebo Liao, Zhaolin Jiang, Dezhi Zhu","doi":"10.1016/j.jallcom.2025.180099","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180099","url":null,"abstract":"The thermal stability of the microstructure and the associated changes in mechanical properties are critical factors for the high-temperature performance of refractory high-entropy alloys (RHEAs). In this study, we fabricated a series of TiVNbTaAl_x (x = 0, 0.1, 0.2, 0.3) RHEAs with the single-phase body-centered cubic (BCC) structure and investigated the phase precipitation behavior of those alloys after annealing at 400–800°C for 100<!-- --> <!-- -->hours. When annealing temperatures were below 600°C, no significant changes were observed in the alloys' microstructure. However, after annealing at 800°C, all alloys precipitated Ti-rich phases. Remarkably, in addition to the hexagonal close-packed (HCP) Ti-rich phase, we identified a rare face-centered cubic (FCC) Ti-rich phase precipitating from the BCC matrix—a phenomenon seldom observed in Ti-containing HEAs and Ti alloys under normal conditions. In the TiVNbTa base alloy, the precipitate was predominantly an acicular FCC phase, while in Al0.1 and Al0.2, the formation of the FCC phase was suppressed, and a small amount of granular HCP phase precipitated at the grain boundary. When Al content (x) increased to 0.3, numerous rod-like FCC phase and granular HCP phase formed both at the grain boundary and within the grains. Although the addition of Al increased the yield strength of the RHEAs through solid-solution strengthening, the alloys' thermal stability decreased, and the fraction of precipitate phase generally increased with higher Al content. Therefore, a significant reduction in compressive yield strength and plasticity occurred in Al0.3 alloy after annealing at 800°C. These novel findings are crucial for enhancing our understanding of phase precipitation behavior in RHEAs at elevated temperatures.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"34 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of carbides and ∑CSL grain boundaries on the recrystallization behavior of Hastelloy X superalloy","authors":"Qiannan Wang, Rui Zhang, Chuanyong Cui, Tingan Zhang, Yizhou Zhou","doi":"10.1016/j.jallcom.2025.180112","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180112","url":null,"abstract":"In this paper, the recrystallization mechanism of Hastelloy X and the grain boundary character distribution (GBCD) are investigated. The effects of carbides and ∑ coincident site lattice (∑CSL) grain boundaries on the recrystallization behavior of Hastelloy X were investigated in detail by hot compression tests. The purpose is to improve the understanding of the microstructural evolution during hot deformation and to understand the role of carbides in the hot deformation process. The hot compression test employs a strain rate of 1<!-- --> <!-- -->s^-1, a temperature range of 1110°C ~ 1170°C and a strain of 20%~50%. Discontinuous dynamic recrystallization (DDRX) was the main dynamic recrystallization (DRX) mechanism. When the forming temperature increased to 1170°C, due to the high deformation temperature, the grains grew further and random grain boundaries replaced ∑ coincident site lattice (∑CSL) grain boundaries. Consequently, the ∑CSL grain boundaries ratio was decreased, which was unfavorable to the GBCD in Hastelloy X alloy. Ti, Mo, and Cr-rich carbides, which are M₆C, M₂₃C₆, and TiC, were found in Hastelloy X. The results indicated that these carbides were preferential nucleation sites for the DRX process, which can serve as particles to stimulate nucleation and promote the DRX process.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"14 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermomechanical Fatigue Behavior and Lifetime Prediction of Nickel-Based Single Crystal Alloys Under Varying Stress Conditions","authors":"Yuanmin Tu, Jundong Wang, Zhixun Wen, Pengfei He","doi":"10.1016/j.jallcom.2025.180202","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180202","url":null,"abstract":"This study systematically investigates the thermomechanical fatigue (TMF) behavior of DD6 nickel-based single-crystal superalloys under varying stress conditions and obtains lifetime distribution data for two distinct phases. Fractographic and microstructural analyses reveal the failure mechanisms of the alloy at different stages. Furthermore, two machine learning-based lifetime prediction methods are proposed. The first method compares the predictive performance of multiple machine learning models, identifying the most effective model and conducting a detailed analysis of the most influential energy-related input features. The second method integrates a sequence learning model with a backpropagation neural network (BPNN), incorporating an attention mechanism to enhance prediction accuracy and generalization capability. The results demonstrate a strong correlation between experimental data and predictions, confirming the effectiveness of both approaches in TMF lifetime prediction. Notably, the sequence learning-based hybrid model outperforms in terms of accuracy and applicability, highlighting its potential for broad engineering applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"34 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of metal oxide semiconductors: Progress in solution-processed photovoltaic Technologies","authors":"Jiangkai Yu, Yujia Dou, Ju Zhao, Shengtian Zhu, Kai Zhang, Fei Huang","doi":"10.1016/j.jallcom.2025.180207","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180207","url":null,"abstract":"Metal oxide semiconductors have emerged as a cornerstone in the development of solution-processed photovoltaic devices, driven by their unique physical and chemical properties. This review highlights the multifunctional roles of four key metal oxides-zinc oxide (ZnO), nickel oxide (NiO_<em>X</em>), tin oxide (SnO₂), and titanium oxide (TiO₂) in enhancing the performance and stability of organic and perovskite solar cells. These materials serve as electron and hole transport layers and demonstrate exceptional properties such as high carrier mobility, optical transparency, chemical stability, and tunable energy level. It also delves into strategies such as doping, interfacial engineering, and defect control to address challenges related to efficiency and stability. By analyzing practical examples, the review highlights how these optimization approaches drive breakthroughs in device efficiency, stability, and scalability. Through a comprehensive analysis of these metal oxides, this review underscores their critical role in achieving efficient, cost-effective, and scalable solution-processed photovoltaic technologies. Furthermore, it provides researchers with actionable technical insights and development strategies, fostering continuous advancements in renewable energy technologies and contributing to the global pursuit of sustainable energy solutions.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"28 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical properties of two novel non-equiatomic Zr-Hf-Ti-Cu-Ni-Co-Al High Entropy Alloys with high glass forming ability","authors":"S. González, S. Wurster, C.G. Garay-Reyes, A. Hurtado-Macías, P. Ramasamy, D. Oleszak, C. Gammer, K.G. Prashanth, A Martínez-García, J. Eckert, R. Martínez-Sánchez","doi":"10.1016/j.jallcom.2025.180196","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180196","url":null,"abstract":"This manuscript aims to study the microstructure and mechanical properties of two novel non-equiatomic Zr_27.5Hf_11.1Ti_6.2Cu_32.4Ni_10.7Co_5.5Al_6.6 and Zr_29.7Hf_16.8Ti_5.2Cu_6.3Ni_12.1Co_8.4Al_21.5 at. % High Entropy Alloys (HEAs) obtained at two different average cooling rates (∼1000<!-- --> <!-- -->K/s and ∼250<!-- --> <!-- -->K/s, for 2 and 4<!-- --> <!-- -->mm diameter samples, respectively). For each casted sample, the cooling rate also changes with the distance from the centre (lowest) to the edge (fastest) thus enabling to explore the evolution of the microstructures at a wide range of cooling rates. For the Zr_27.5Hf_11.1Ti_6.2Cu_32.4Ni_10.7Co_5.5Al_6.6 alloy, the mechanical properties variation between the highest and lowest cooled regions, from the narrow amorphous ring edge (nanoindentation hardness H = 8.2±0.42<!-- --> <!-- -->GPa) to the centre of the largest sample (H = 8.8±0.35<!-- --> <!-- -->GPa), is very small. This is attributed to the small microstructural differences, mostly formation of a solid solution BCC crystalline phase, although with some HCP phase. The amorphous phase is in a very relaxed state, about to crystallize. However, for the Zr_29.7Hf_16.8Ti_5.2Cu_6.3Ni_12.1Co_8.4Al_21.5 alloy, larger microstructural differences, and therefore mechanical properties, between the highest and lowest cooled regions are detected. From a fully amorphous region far from equilibrium (H = 8.5±0.44<!-- --> <!-- -->GPa) to a solid solution of BCC (∼80% vol.) and HCP (∼20% vol.) crystalline phase (H = 10.8±0.6<!-- --> <!-- -->GPa) and free from brittle intermetallic phases. This suggests, the latter alloy is a nearer eutectic composition and therefore the microstructure is more sensitive to changes of the cooling rate, something to take into consideration when designing microstructures for engineering applications.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"5 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile engineering of n-p-n In2O3-Co3O4-ZnO ternary: Influence of structure and optical band gap toward acetone detection","authors":"Katlego L. Morulane, Zamaswazi P. Tshabalala, Hendrik C. Swart, David E. Motaung","doi":"10.1016/j.jallcom.2025.180088","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180088","url":null,"abstract":"Acetone gas monitoring and detection must be done fast and precisely to preserve air quality and detect diabetes non-invasively. Thus, herein, we report on the fabrication of various n-p-n ternary structures of In₂O₃-Co₃O₄-CeO₂ (In-Co-Ce), In₂O₃-Co₃O₄-SnO₂ (In-Co-Sn), In₂O₃-Co₃O₄-ZnO (In-Co-Zn), and In₂O₃-Co₃O₄-ZrO₂ (In-Co-Zr) using a hydrothermal approach. Structural disclosed the formation of ternary structures. Comparing the performance of the tested In-Co-Ce, In-Co-Sn, In-Co-Zn, and In-Co-Zr sensors, the In-Co-Zn sensor displayed n-type characteristics with excellent sensitivity, selectivity, and reliable stability to acetone (C₃H₆O) at 150 °C. These exceptional gas sensing characteristics are recognized by the improved interfacial synergy between the In₂O₃, Co₃O₄, and ZnO, which enhanced the electrical conductivity and resulted in better sensing performance. Furthermore, the improved oxygen vacancies and establishment of the n-p-n heterojunction modulated the heterojunction barrier. The higher BET surface area of In-Co-Zn, consisting of a large pore diameter, enabled the gas molecules to penetrate and interact with the sensing surface, leading to improved sensing. The fabricated In-Co-Zn ternary structure exhibited a reduced band gap compared to other ternary nanostructures, making it minimal for capturing electrons by C₃H₆O in the conduction band. The molecular orbital diagram of ZnO was used to justify the improved sensing performance of In-Co-Zn ternary structures toward C₃H₆O. Therefore, the engineering of n-p-n In-Co-Zn ternary structures provided a facile approach for the detection of acetone at low ppm levels.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"70 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced strength and ductility of pure copper at liquid nitrogen temperature","authors":"Wangjun Cheng, Yue Zhao, Acong Meng, Senjun Yang","doi":"10.1016/j.jallcom.2025.180080","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180080","url":null,"abstract":"An experimental study was conducted to investigate the improved ductility and strength of cold-rolled copper sheets. elucidate Its deformation mechanism at liquid nitrogen temperature (LNT) was elucidated. Tensile and bulging tests were conducted to comprehensively analyze the deformation behavior under uniaxial and complex stress states. The relationships between macroscopic deformation and microstructural evolution were quantitatively evaluated through scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), and transmission electron microscopy (TEM). At LNT, the ductility of pure Cu increased by 72.2% compared to room temperature (RT). The yield strength and tensile strength enhanced by 18.7% and 56.6%, respectively. The average limiting dome height (LDH) increased from 17.9<!-- --> <!-- -->mm to 21.8<!-- --> <!-- -->mm. These results indicated that pure Cu showed a synergistic enhancement of strength and ductility at LNT. Also, the work-hardening coefficient of pure Cu was found to be more dependent on temperature than on strain rate. In the biaxial stress state, the enhanced ductility at LNT was attributed to the reorientation of grains. Additionally, pure Cu exhibited an enhanced resistance to localized deformation. The increase in strength was due to a reduction in relative slip distance, but the significant increase in dislocation density, Peierls-Nabarro stress and strain hardening at LNT.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"25 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure, mechanical properties, and tribological behavior of diamond-reinforced CuSnTi matrix composites by hot press sintering","authors":"Jianxiang Wang, Yidi Li, Ziming Zeng, Wang Hui, Chenying Shi, Biaobiao Yang, Yunping Li","doi":"10.1016/j.jallcom.2025.180203","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180203","url":null,"abstract":"Diamond-reinforced CuSnTi matrix composites were fabricated by hot press sintering (HPS) to investigate the effect of diamond content (0, 10, and 20<!-- --> <!-- -->wt%) on the microstructure, mechanical, and tribological properties. The results reveal that the 10<!-- --> <!-- -->wt% diamond composite retains diamond particles more effectively within the matrix, whereas the 20<!-- --> <!-- -->wt% diamond composite shows reduced retention due to cracking in Ti-rich areas, leading to diminished mechanical and tribological properties. Notably, the 10<!-- --> <!-- -->wt% diamond composite exhibits the most significant improvements, with microhardness and compressive yield strength enhanced by 25.10% and 59.70% compared to the CuSnTi alloy. The 10<!-- --> <!-- -->wt% diamond composite exhibits the lowest average coefficient of friction (ACOF) and wear rate. Furthermore, the wear mechanism evolves with increasing diamond content, transitioning from fatigue wear to abrasive wear, and eventually to a combination of abrasive and fatigue wear. This work facilitates the development of copper-based diamond tools with higher hardness and better wear resistance.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creep behavior and mechanisms of biodegradable Zn-0.4Li-0.45Mn alloy under physiological and sterilization temperatures at various stress levels","authors":"Tao Sun, Hailing Chen, Lebin Tang, Xinglong Zhu, Qingke Zhang, Xiang Lu, Lijing Yang, Zhenlun Song","doi":"10.1016/j.jallcom.2025.180069","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180069","url":null,"abstract":"The creep behavior of Zn-0.4Li-0.45Mn alloy, prepared by melt casting and hot extrusion as a potential biodegradable implant material, was investigated under stresses ranging from 70 to 260<!-- --> <!-- -->MPa. Creep tests were conducted at 37°C, 51°C, and 121°C, corresponding to body temperature, ethylene oxide sterilization, and autoclaving sterilization temperatures, respectively. The study found that the alloy exhibited significant creep deformation over 750<!-- --> <!-- -->hours, particularly under low-stress conditions at 37°C, where it demonstrated a high true stress exponent (3.70). The alloy's creep characteristics showed clear temperature dependence within this stress range, with an apparent creep activation energy of 74.5<!-- --> <!-- -->kJ/mol at 70<!-- --> <!-- -->MPa, suggesting that the creep mechanism is primarily controlled by a stress-sensitive, thermally activated process. Microstructural analysis revealed significant grain deformation on the alloy surface before and after creep, and scanning electron microscopy images showed grain boundary sliding, indicating this process as the primary mechanism for creep failure. Additionally, the Maxwell viscoelastic model was used to accurately characterize the alloy's behavior during the steady-state creep phase, with model fitting showing strong agreement with experimental data. These results not only enhance the understanding of the creep behavior of zinc alloys in biomedical applications but also provide a scientific basis for their potential use in materials science and engineering.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"3 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of High-Temperature Durability for Ni-20Co-28Cr-10Al-0.5Y Coatings via High-Current Pulsed Electron Beam Irradiation at 1323K","authors":"Hanqing Xie, Jie Cai, Chuntang Yu, Min Feng, Xiaoyun Li, Shutao Chen, Wanqi Pu, Shuai Li, Zebin Bao, Shenglong Zhu, Fuhui Wang","doi":"10.1016/j.jallcom.2025.180201","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180201","url":null,"abstract":"The arc ion plated NiCoCrAlY coating was irradiated by high-current pulsed electron beam (HCPEB). A comparison of high temperature properties was made between the HCPEB-treated and conventional NiCoCrAlY coatings. The isothermal and cyclic oxidation tests of two types of coatings were evaluated at 1323<!-- --> <!-- -->K, and the finite element simulation analysis of the coating after cyclic oxidation test was carried out. The results indicated that the HCPEB-treated coating demonstrated superior anti-oxidation properties. The adherent, thinner α-Al₂O₃ scale effectively prevented the emergence of detrimental (Ni, Co)(Cr, Al)₂O₄ spinel oxide. Moreover, the HCPEB treatment promotes the transformation of θ-Al₂O₃ to α-Al₂O₃ in the initial oxidation stage. The effect of HCPEB treatment on oxidation resistance and TGO (Thermally Grown Oxide) spallation resistance of the NiCoCrAlY coating is discussed in detail.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"10 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}