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

{"title":"Effect of ion energy and fluence on the electrical resistivity of silver implanted copper surface","authors":"Bharti Malvi ,&nbsp;Naressh Kumar ,&nbsp;C. Balasubramanian ,&nbsp;Asokan Kandasami ,&nbsp;B. Spataro ,&nbsp;J. Rezvani ,&nbsp;A. Marcelli","doi":"10.1016/j.jmrt.2025.07.181","DOIUrl":"10.1016/j.jmrt.2025.07.181","url":null,"abstract":"<div><div>Oxygen-free high thermal conductivity copper (OFHC) is widely used in accelerator beamlines due to its properties like high electrical and thermal conductivity, high impact strength, and high ductility. However, due to thermal stress, the properties of copper degrade with time. Small quantities of controlled introduction of silver atoms in copper help alleviate this problem by reducing the thermal stress, without altering its conductivity properties. In this study, we characterize for the first time copper plates implanted with silver ions. Electrical resistivity measurements were performed to observe changes in the properties of copper implanted with Ag at various fluences. The 100 MeV Ag ions were implanted on thick copper plates, and 70 keV Ag ions were implanted on thin copper films deposited on Si and Sapphire substrates. Characterizations of the surface morphology and the chemical composition were performed on both pristine and implanted samples. While the Rutherford backscattering technique confirmed the presence of implanted Ag ions in Cu thin films, the Raman spectra showed the depth of ion implantations. Electrical resistivity tests performed on these samples showed a change in the sheet resistance after irradiation and annealing. In the irradiated samples, the decrease in the sheet resistance points out a mechanism associated with the presence of silver, even in a very low amount.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 571-580"},"PeriodicalIF":6.6,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724296","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":"In-situ joining of SiCf/SiC composites to single-crystal CMSX-6 superalloy via active unidirectional casting technology","authors":"Yingxin Wang ,&nbsp;Fu Wang ,&nbsp;Qiang Yang ,&nbsp;Dichen Li ,&nbsp;Yunsong Zhao ,&nbsp;Jiantao Wu","doi":"10.1016/j.jmrt.2025.07.185","DOIUrl":"10.1016/j.jmrt.2025.07.185","url":null,"abstract":"<div><div>To address the manufacturability challenges of silicon carbide fiber-reinforced silicon carbide (SiC_f/SiC) composites and to enhance their industrial applications, this study developed an active unidirectional casting technology to in-situ join SiC_f/SiC composites with Ni-based single crystal (SC) CMSX-6 superalloy. The macro- and microstructure, as well as the high-temperature tearing performance of the joint, were investigated. The results demonstrated the successful fabrication of defect-free SiC_f/SiC/SC CMSX-6 joints. The in-situ generated CMSX-6 portion displayed a SC structure, with a maximum crystallographic misorientation of approximately 8.34° from the favored [001] orientation of Ni-based SC superalloys. A reaction interlayer composed of a nickel matrix, along with TiC, Cr₃C₂, and Ni₃₁Si₁₂ phases, formed between the SiC_f/SiC and superalloy, exhibiting a crystallographic orientation close to [101]. The maximum shear strength of the joining interface at 800 °C achieved approximately 25 MPa, which exceeds the interlaminar bonding strength of the SiC_f/SiC composite. This desirable performance is ascribed to the combined effects of the pinning mechanism, which arises from the infiltration of molten CMSX-6 into SiC_f/SiC composite, and the reduction of residual thermal stress afforded by the graded interface formed during joining.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 30-37"},"PeriodicalIF":6.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703434","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":"Laser powder bed fusion of a novel high-strength Al–Mg–Er–Zr-Sc alloy: Process, microstructure, and performance","authors":"Zhengjiang Gao ,&nbsp;Hui Li ,&nbsp;Teng Ma ,&nbsp;Huan Yang ,&nbsp;Wei Wang ,&nbsp;Wu Wei ,&nbsp;Hui Huang ,&nbsp;Shengping Wen ,&nbsp;Zuoren Nie","doi":"10.1016/j.jmrt.2025.07.186","DOIUrl":"10.1016/j.jmrt.2025.07.186","url":null,"abstract":"<div><div>In this work, a novel high-strength Al–Mg–Er–Zr-Sc alloy was fabricated by laser powder bed fusion (LPBF). The effects of laser power and scanning speed on the internal defect, density, and microstructure were systematically investigated, and their correlation with alloy microhardness, mechanical strength and elongation were also explored. The results show that alloy exhibits good processability with a wide process window. Alloy strength and microhardness are mainly associated with grain size, precipitation phase size and its distribution. Grains as well as precipitation phases become finer and precipitation density is increased as scanning speed increases or laser power decreases, leading to an enhancement in alloy strength and microhardness. The elongation is closely related to alloy density, which first increases and then decreases with the rising volumetric laser energy density, accompanied by the transformation of internal defects from unfused defects to pores and then to keyholes. Both of keyholes caused by excessive energy input and unfused defects caused by insufficient energy input will decrease alloy density and induce stress concentration, resulting in a reduction in elongation. And compared with keyholes, unfused defects are more detrimental to material elongation and should be avoid in production. Under appropriate process parameters, alloys with density over 99.8 % can be obtained, and can achieve a good combination of strength and plasticity, with a yield strength of 521 MPa, a tensile strength of up to 531 MPa and an elongation of 12 % after heat treatment.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 118-132"},"PeriodicalIF":6.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704885","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":"Interconnection mechanism and strengthening behavior of nano-silver sintered joints for silicon carbide power module packaging: A combined EBSD and nanoindentation study","authors":"Chao Gu ,&nbsp;Xiao Hu ,&nbsp;Xuyang Yan ,&nbsp;Wei Chen ,&nbsp;Junwei Chen ,&nbsp;Kai Lu ,&nbsp;Tao Wang ,&nbsp;Guoqi Zhang ,&nbsp;Jiajie Fan","doi":"10.1016/j.jmrt.2025.07.135","DOIUrl":"10.1016/j.jmrt.2025.07.135","url":null,"abstract":"<div><div>Investigating the interconnection and strengthening mechanisms of die-attach layers is instrumental for advancing die attach process toward low-pressure and, ultimately, pressureless sintering while maintaining reliability. This study compares the microstructure and micromechanical heterogeneity of the pressure-assisted and pressureless regions in SiC die attach to elucidate the interconnection and strengthening mechanisms. Recrystallized grains make up 71.7 % of the pressureless region, markedly lower than the approximately 90 % observed in the pressure-assisted region, resulting in a higher porosity in the former. Evidence of both continuous dynamic recrystallization and discontinuous dynamic recrystallization is identified throughout the sintered layer. Microhardness reveals that the pressureless zone exhibits a hardness of 0.373 GPa, significantly lower than left (0.745 GPa) and right (1.832 GPa) of pressure-assisted region. All three regions share an average grain size of 400 ± 50 nm, and geometrically necessary dislocation density in pressureless zone exceeds that in pressure-assisted areas, neither of which can account for the difference in micromechanical performance. In contrast, the statistically stored dislocation (SSD) densities on the left and right of the pressure-assisted region are approximately 4.74 × 10¹⁴ m⁻² and 2.88 × 10¹⁵ m⁻², respectively—substantially higher than the 2.88 × 10¹⁴ m⁻² measured in the pressureless region. Collectively, these findings demonstrate that dislocation strengthening, and particularly SSD density, constitutes the dominant strengthening mechanism in silver sintered layers. This work not only provides new insights for enhancing reliability under low-pressure and pressureless sintering but also establishes a theoretical foundation for optimizing sintering material formulations.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 619-636"},"PeriodicalIF":6.6,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738108","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":"Corrosion behavior of low-alloy steel in Xinjiang's arid atmosphere: Divergent protective effects of Cr and Mn","authors":"Tao Wang ,&nbsp;SiWei Zhang ,&nbsp;ShenRong Lu ,&nbsp;Cuiwei Du ,&nbsp;Xiaogang Li","doi":"10.1016/j.jmrt.2025.07.173","DOIUrl":"10.1016/j.jmrt.2025.07.173","url":null,"abstract":"<div><div>Through systematic long-term atmospheric exposure, the corrosion performance and protective mechanisms of rust layers on low-alloy structural steels in Xinjiang's arid climate were comprehensively evaluated. Results demonstrate that MnO₂ and MnFe₂O₄ can moderately enhance the compactness of the rust layer. However, the combined effects of strong wind-sand erosion and high diurnal temperature variations induce significant internal stresses within the rust layer, leading to crack formation. Notably, Cr alloying demonstrates superior corrosion mitigation effects through dual mechanisms: (1) catalytically facilitating the preferential formation of thermodynamically stable α-FeOOH, (2) generation of highly protective (FeCr₂O₄), Cr(OH)₃ and Cr₂O₃.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 96-108"},"PeriodicalIF":6.2,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711595","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":"Impact of doping and spin-polarization on the γ-Fe/Cr2O3 interfacial adhesion","authors":"Mingtai Zou ,&nbsp;Wen Tong Geng ,&nbsp;Wei Xu ,&nbsp;Chenchong Wang","doi":"10.1016/j.jmrt.2025.07.155","DOIUrl":"10.1016/j.jmrt.2025.07.155","url":null,"abstract":"<div><div>In natural service environments, the surface of traditional stainless steel, heterogeneous alloys or gradient materials with γ-Fe matrix is vulnerable to the external environment and the combined effects of mechanical stress, leading to easy detachment of the metal and oxide film. Strengthening the bonding of the γ-Fe passivation film is crucial for enhancing the corrosion resistance of the material. This study utilized first-principles calculations to systematically explore the γ-Fe/Cr₂O₃ interface, with a particular emphasis on the impact of spin-polarization and the synergistic interactions between alloy elements and the interface. The computational findings reveal that incorporating magnetic settings in the Fe/Cr₂O₃ system significantly enhances calculation accuracy and confirms the existence of an Fe₂O₃ transition layer at the interface. Meanwhile, incorporating spin polarization alters the effect of Al on interfacial binding energy. Furthermore, this study clarifies the intricate interactions between the passivation film and the synergistic effects of two alloy elements.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 38-48"},"PeriodicalIF":6.2,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704882","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":"Hybrid experimental–numerical study on nanoindentation response of dual-phase steels: From macroscale to atomic scale","authors":"M. Fesahat ,&nbsp;M. Javidani ,&nbsp;M. Soltanieh ,&nbsp;M. Mahmoudi ,&nbsp;H. Vafaeenezhad","doi":"10.1016/j.jmrt.2025.07.133","DOIUrl":"10.1016/j.jmrt.2025.07.133","url":null,"abstract":"<div><div>In this study, the elastic and plastic behaviors of the ferrite and martensite phases of dual-phase (DP) steels were investigated using nanoindentation data and the related constitutive equations. First, hardness (H) and elastic modulus (E) were determined to derive the monotonic yield stress (σ_y) and Hollomon's parameter and then for work hardening exponent (K) and work hardening rate (n).Next, the results obtained by the nanomechanical approach implemented herein were validated using the semiquantitative data computed by numerical finite element analysis (FEA) and molecular dynamics (MD). The difference between plasticity of ferrite and martensite can be attributed ti the geometrically necessary dislocations (GNDs), which stimulate work hardening. The elastic and plastic data of both the phases were incorporated into FEA to simulate the load–displacement curves and the projected regions. In addition, the load–displacement curves of the ferrite and martensite phases and the hardness and Young's modulus determined by MD were in good agreement with the nanoindentation test and FEA results. The strain-rate sensitivity of ferrite, which exhibited a lower hardness and greater indentation depth, was 0.0985, whereas that of martensite was approximately 0.087. Furthermore, the TEM images proved the existence of GNDs at the ferrite–martensite interface and their role in cell formation in the ferrite zone and interphase region.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 503-516"},"PeriodicalIF":6.6,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724295","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":"Synthesis and properties of iron silicides","authors":"Pavel Novák ,&nbsp;Ester Duchková ,&nbsp;Andrea Boháčová ,&nbsp;Alena Michalcová ,&nbsp;Filip Průša ,&nbsp;Kateřina Skotnicová ,&nbsp;Ivo Szurman","doi":"10.1016/j.jmrt.2025.07.129","DOIUrl":"10.1016/j.jmrt.2025.07.129","url":null,"abstract":"<div><div>Composite materials based on aluminide matrix and hard silicide reinforcement are currently considered as potential tool materials. However, the reasonable design of the composites is limited by incomplete available information about the properties of suitable silicides. Therefore, this work focuses on the synthesis and characterization of iron silicides, which could be very promising also due to the low price of the constituents. The synthesis route for individual iron silicides (Fe₃Si, FeSi, FeSi₂) was investigated using a combination of mechanical alloying, spark plasma sintering, and homogenization annealing. In the case of Fe₅Si₃, which is thermodynamically stable at the temperatures above 825 °C, homogenization annealing was followed by water quenching. The synthesized iron silicides were characterized from the viewpoint of phase composition, microstructure, hardness and abrasive wear resistance. As the hardest silicide, Fe₅Si₃ was proved; however, it was only obtained in coexistence with other phases due to its low thermodynamic stability. Among the stable iron silicides, FeSi phase offers the best combination of hardness and tribological properties.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"38 ","pages":"Pages 165-174"},"PeriodicalIF":6.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713321","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":"Insights into laser powder bed fused β-type titanium alloy: Investigating corrosion behavior and wear properties after post-heat treatment","authors":"Xuan Luo ,&nbsp;Yuhao Li ,&nbsp;Chao Yang ,&nbsp;Chao Zhao ,&nbsp;Hongwei Ma ,&nbsp;Tao Song ,&nbsp;Minghan Sun ,&nbsp;Xiaotao Liu ,&nbsp;Dongdong Li ,&nbsp;Ning Li","doi":"10.1016/j.jmrt.2025.06.120","DOIUrl":"10.1016/j.jmrt.2025.06.120","url":null,"abstract":"<div><div>The systematic evaluation of corrosion resistance and wear behavior represents a critical imperative for advancing biomedical titanium alloys in implant applications. This study systematically examines the corrosion-wear characteristics of laser powder bed fusion (LPBF)-fabricated β-type Ti-34.5Nb-6.9Zr-4.9Ta-1.4Si (TNZTS) alloy after post heat treatment, comparing with LPBF-processed Ti–35Nb–7Zr–5Ta (TNZT) and Ti–6Al–4V counterparts. Electrochemical analysis reveals the TNZTS system's good corrosion resistance, stemming primarily from stabilized passivation film formation. The incorporation of Si did not significantly affect the corrosion performance of TNZT alloy. In addition, the TNZTS alloy with hard S2 phase showes improvement in wear resistance, as manifested by shallower and narrower wear tracks and a lower specific wear rate. This study provides foundational insights into the novel β-type Ti–Nb–Zr–Ta–Si alloy with excellent corrosion resistance and wear properties, positioning it as a promising candidate for load-bearing orthopedic implant applications.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1596-1605"},"PeriodicalIF":6.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322234","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":"High-throughput evaluation of Mo effect on hydrogen embrittlement behavior of ultra-high strength steel","authors":"Xilin Xiong ,&nbsp;Tongqian Chen ,&nbsp;Honghui Wu ,&nbsp;Chunlei Shang ,&nbsp;Rongjian Shi ,&nbsp;Zhongwei Wang ,&nbsp;Yanjing Su","doi":"10.1016/j.jmrt.2025.06.149","DOIUrl":"10.1016/j.jmrt.2025.06.149","url":null,"abstract":"<div><div>The susceptibility of high-strength hot-stamping steels to hydrogen embrittlement (HE) remains a critical challenge for their widespread adoption in automotive applications. In this study, we introduce a novel high-throughput methodology to assess the influence of molybdenum (Mo) content on the HE behavior of 32MnB5 steel. By integrating diffusion couple to create a Mo compositional gradient (0–0.6 wt%) and fabricating an array of microcantilevers via focused ion beam (FIB) milling, we employed nanoindentation to evaluate fracture toughness under both hydrogen-charged and hydrogen-free conditions. Microstructural characterization via electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) revealed that increasing Mo content slightly induces grain refinement and reduces localized stress concentrations, enhancing grain boundary cohesion and thereby increasing fracture toughness. Under hydrogen-charged conditions, however, hydrogen significantly reduces fracture toughness, with Mo exerting dual competing effects on the plastic component of fracture (J_plastic): grain refinement and reduction of localized stress concentrations enhance J_plastic, while lattice distortion exacerbates hydrogen-induced dislocation pinning, diminishing J_plastic. Consequently, J_plastic shows no significant variation with Mo content in the presence of hydrogen, yet overall, HE susceptibility decreases with higher Mo levels due to dominant elastic contributions. This high-throughput approach provides a robust alternative for rapidly screening alloy compositions to mitigate HE in advanced high-strength steels.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1762-1770"},"PeriodicalIF":6.2,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331161","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}