Intermetallics最新文献

Brazing mechanism of Al0.1CoCrFeNi with composite structure nano-multilayer foils: Molecular dynamics and experimental perspectives Al0.1CoCrFeNi与复合结构纳米多层箔的钎焊机理：分子动力学和实验观点

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-19 DOI: 10.1016/j.intermet.2025.109030

Baolei Wu , Chengdi Song , Mingkang Wang , FuXiang Li , Weiyuan Yu

{"title":"Brazing mechanism of Al0.1CoCrFeNi with composite structure nano-multilayer foils: Molecular dynamics and experimental perspectives","authors":"Baolei Wu , Chengdi Song , Mingkang Wang , FuXiang Li , Weiyuan Yu","doi":"10.1016/j.intermet.2025.109030","DOIUrl":"10.1016/j.intermet.2025.109030","url":null,"abstract":"<div><div>A defect-free brazed joint with an FCC + BCC dual-phase solid-solution structure was successfully fabricated using an Al<sub>0.1</sub>CoCrFeNi high-entropy alloy (HEA) with novel nano-multilayer foils. This study combined molecular dynamics (MD) simulations and experimental methods to elucidate the interfacial diffusion behavior and microstructure formation mechanism during brazing. MD simulations revealed that joint formation progressed from the initial nano-multilayer structure to a disordered solid solution, followed by wetting from a molten Al phase, and culminating in a solid-solution reaction. Experimentally, the joint microstructure was found to consist primarily of a hard BCC (Al-Ni-rich) phase and ductile FCC (Co-Cr-Fe-rich) phase. The formation of this homogeneous solid-solution zone was attributed to extensive atomic interdiffusion and intense interfacial reactions promoted by the high-entropy effect. The brazed joints exhibited maximum shear strengths of 308.5 MPa at room temperature and 292.8 MPa at 1073 K. This study demonstrated that nano-multilayer foils can effectively serve as HEA filler materials, thereby expanding the potential applications of HEAs and providing a novel and reliable strategy for joining Al<sub>0.1</sub>CoCrFeNi HEAs.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109030"},"PeriodicalIF":4.8,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145334818","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}

引用次数: 0

Microstructural and thermal evolution of hBN reinforced Fe3Al intermetallic synthesized via SHS SHS法合成hBN增强Fe3Al金属间化合物的显微组织和热演化

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-19 DOI: 10.1016/j.intermet.2025.109037

Berna Pasaoglu , Nese Ozturk Korpe , Yapıncak Goncu

{"title":"Microstructural and thermal evolution of hBN reinforced Fe3Al intermetallic synthesized via SHS","authors":"Berna Pasaoglu , Nese Ozturk Korpe , Yapıncak Goncu","doi":"10.1016/j.intermet.2025.109037","DOIUrl":"10.1016/j.intermet.2025.109037","url":null,"abstract":"<div><div>In this study, Fe<sub>3</sub>Al-based intermetallic composites reinforced with hexagonal boron nitride (hBN) nanoparticles were synthesized using Self-Propagating High-Temperature Synthesis (SHS), followed by controlled heat treatment and sintering. During SHS, FeAl formed as a transient phase and transformed into stable Fe<sub>3</sub>Al after heating at 1000 °C. The addition of hBN significantly affected both the microstructure and thermal behavior, facilitating the in-situ formation of secondary phases such as AlN and Al<sub>2</sub>O<sub>3</sub>. Despite challenges in achieving uniform dispersion, SEM–EDX analysis confirmed the retention of hBN's lamellar morphology and its interfacial interaction with the matrix. While moderate hBN content enhanced thermal stability, excessive amounts reduced densification and increased brittleness. Short-term heat treatment after SHS was found to be critical for microstructural refinement. The results highlight the multifunctional role of hBN as both a structural reinforcement and a thermal modifier, supporting the potential of Fe–Al/hBN composites for high-temperature applications in aerospace, energy, and metallurgical industries.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109037"},"PeriodicalIF":4.8,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145334036","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}

引用次数: 0

Microstructure and properties of Nano-WC particle-reinforced lamellar eutectic high-entropy alloy by laser directed energy deposition 激光定向能沉积纳米wc颗粒增强层状共晶高熵合金的组织与性能

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-18 DOI: 10.1016/j.intermet.2025.109038

Bin Wang , Yaoning Sun , Ning Wei , Yifei Xu , Liufei Huang

{"title":"Microstructure and properties of Nano-WC particle-reinforced lamellar eutectic high-entropy alloy by laser directed energy deposition","authors":"Bin Wang , Yaoning Sun , Ning Wei , Yifei Xu , Liufei Huang","doi":"10.1016/j.intermet.2025.109038","DOIUrl":"10.1016/j.intermet.2025.109038","url":null,"abstract":"<div><div>This study fabricated AlCoCrFeNi<sub>2.1</sub> eutectic high-entropy alloy (EHEA) composites with varying WC contents (0 wt%, 2.5 wt%, and 5 wt%) via laser-directed energy deposition (DED). The microstructural evolution, mechanical properties, tribological behavior, and corrosion resistance of DED-processed composites were systematically investigated. Results indicate that the pristine EHEA exhibited typical lamellar eutectic structures with epitaxial growth along the thermal gradient direction. WC incorporation refined the as-printed microstructure, transforming the eutectic morphology from lamellar to island-like configurations. Consequently, the DED-EHEA-2.5WC composite demonstrated enhanced yield strength (774 MPa) and ultimate tensile strength (1240 MPa), representing improvements of 14.84 % and 12.22 % over the base EHEA (674 MPa and 1105 MPa), respectively. Wear testing revealed that DED-EHEA-2.5WC exhibited 42.24 % and 38.11 % lower wear rates than DED-EHEA and DED-EHEA-5WC counterparts. Furthermore, optimal WC addition (2.5 wt%) improved corrosion resistance, evidenced by an 81.6 mV nobler corrosion potential and 52.83 % reduction in corrosion current density versus EHEA. XPS analysis confirmed that WC addition stabilized and densified Al<sub>2</sub>O<sub>3</sub> passive films, Cr<sub>2</sub>O<sub>3</sub> layers, and WO<sub>3</sub> phases through three synergistic mechanisms: reinforcement strengthening, passive film optimization, and oxide phase stabilization. This work proposes a novel strategy for achieving multi-property synergy in additively manufactured eutectic high-entropy alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109038"},"PeriodicalIF":4.8,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145326863","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}

引用次数: 0

Effect of carbon content on the microstructure and tribological properties of FeCrMn1.5AlCuC high-entropy alloys 碳含量对FeCrMn1.5AlCuC高熵合金组织和摩擦学性能的影响

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-17 DOI: 10.1016/j.intermet.2025.109029

Kai Ma , Li Feng , Yanchun Zhao , Jianjun Liu

{"title":"Effect of carbon content on the microstructure and tribological properties of FeCrMn1.5AlCuC high-entropy alloys","authors":"Kai Ma , Li Feng , Yanchun Zhao , Jianjun Liu","doi":"10.1016/j.intermet.2025.109029","DOIUrl":"10.1016/j.intermet.2025.109029","url":null,"abstract":"<div><div>This study investigates the influence of carbon content on the microstructure and tribological properties of FeCrMn<sub>1.5</sub>AlCuC<sub><em>x</em></sub> (<em>x</em> = 0, 0.05, 0.1, 0.15, 0.2, 0.25) high-entropy alloys. The results show that the phase structure of the alloy comprises BCC, B2, and L2<sub>1</sub> phases, with a typical dendritic microstructure. With the increase in carbon content, the critical carbon content for carbide precipitation in the alloy ranges from 0.10 to 0.15. Nanometric carbides of C (Cr, Mn, and Fe) have appeared in the interdendritic structure of the alloy. When <em>x</em> = 0.2, the alloy exhibits excellent friction performance, with a hardness of 576 HV and a wear rate of 1.6 × 10<sup>−6</sup> mm<sup>3</sup> N<sup>−1</sup> m<sup>−1</sup>. Compared with the carbon-free alloy, the alloy with <em>x</em> = 0.2 exhibits a 40.97 % increase in hardness and a 27.59 % decrease in wear rate. When the size and volume fraction of the nano-precipitates are 151.43 nm and 18.6 %, respectively, the alloy's properties are most effectively enhanced by carbon-driven optimization.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109029"},"PeriodicalIF":4.8,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145334820","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}

引用次数: 0

Tailoring Si/Mn ratio to optimize magnetocaloric performance of FeCoNi-based high-entropy alloys 调整Si/Mn比以优化fecni基高熵合金的磁热性能

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-14 DOI: 10.1016/j.intermet.2025.109024

Xiaojiang Zhai , Xiaodong Si , Yunshan Dong , Yongsheng Liu

{"title":"Tailoring Si/Mn ratio to optimize magnetocaloric performance of FeCoNi-based high-entropy alloys","authors":"Xiaojiang Zhai , Xiaodong Si , Yunshan Dong , Yongsheng Liu","doi":"10.1016/j.intermet.2025.109024","DOIUrl":"10.1016/j.intermet.2025.109024","url":null,"abstract":"<div><div>This study systematically investigates the influence of the Si/Mn ratio on the magnetocaloric properties of FeCoNiSi<sub>x</sub>Mn<sub>0.4-x</sub> (x = 0.1, 0.2, and 0.3) high-entropy alloys (HEAs) using a multi-scale computational approach. By combining special quasi-random structure (SQS) modeling, first-principles density functional theory (DFT) calculations, and atomic-scale magnetic simulations, we elucidate the synergistic effects of compositional disorder on the electronic structure and magnetic ordering. Key results indicate that increasing the Si content reduces the cell volume via atomic size effects and decreases the total magnetic moment, while significantly raising the Curie temperature (599–673 K) due to enhanced ferromagnetic exchange coupling. Under an applied field of 5 T, an optimized magnetocaloric response is observed: at x = 0.3, the magnetic entropy change exhibits a full width at half maximum of 2.61 J/(kg·K) along with a high relative cooling power (RCP = 515 J/kg), while a peak temperature-averaged entropy change (TEC) of 3.17 J/(kg·K) is achieved at x = 0.2 over a temperature span of 10 K (ΔT<sub>H-C</sub> = 10 K). The maximum half-peak width of the magnetic entropy change (δT<sub>FWHM</sub>) for this alloy system ranges from 156.0 K to 196.1 K. This work reveals an underlying composition–electronic–magnetic correlation mechanism, suggesting promising potential for designing high-temperature solid-state refrigeration materials with broad operational windows.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109024"},"PeriodicalIF":4.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145334819","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}

引用次数: 0

Thermal activation-induced transition of deformation mechanism for the duplex TiAl alloy: From transgranular to lamellar fracture 热激活诱导双相TiAl合金变形机制的转变：从穿晶断裂到片层断裂

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-14 DOI: 10.1016/j.intermet.2025.109026

Yuhong Wu , Furong Liu , Yue Zhang , Zehui Jiao , Qin Wang , He Zhang

{"title":"Thermal activation-induced transition of deformation mechanism for the duplex TiAl alloy: From transgranular to lamellar fracture","authors":"Yuhong Wu , Furong Liu , Yue Zhang , Zehui Jiao , Qin Wang , He Zhang","doi":"10.1016/j.intermet.2025.109026","DOIUrl":"10.1016/j.intermet.2025.109026","url":null,"abstract":"<div><div>Ti-48Al-2Cr-2Nb alloys fabricated by electron beam melting (EBM) exhibit equiaxed-γ grains and nano-lamellar colonies. However, the nanoscale interfacial interactions under thermal stress in additively manufactured nanostructures remain insufficiently understood. In this work, a combination of tensile experiments at room temperature (RT) and 973 K, multi-scale microstructural characterization, and polycrystalline molecular dynamics (MD) simulations was employed. Experimental evidence revealed a remarkable transition in the fracture mechanism from a transgranular mode at RT to a lamellar mode at 973 K, leading to a simultaneous enhancement in both strength and elongation. Atomic-scale insights from MD simulations clarify that thermal activation is the primary driver for this mechanistic shift by enabling a sequential and synergistic deformation process. Deformation at 973 K initiates with extensive twinning within the equiaxed-γ grains, which accommodates initial plastic strain and enhances overall ductility. As deformation proceeds, the mechanism transitions to one dominated by dislocation reactions at nano-interfaces within the lamellar colonies, leading to significant work hardening and strength. Lomer-Cottrell (L-C) locks formed at these interfaces act not only as stress concentrators but also as dislocation sources. The subsequent emission and cross-slip of Shockley partial dislocations effectively relieve internal stress, while the formation of new L-C locks from these partials shortens the slip distance, contributing to work hardening. This synergistic mechanism of stress relief and dislocation locking fundamentally explains the concurrent improvement in ductility and strength. This study provides a fundamental understanding of the high-temperature deformation and fracture mechanisms in additively manufactured duplex TiAl alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"188 ","pages":"Article 109026"},"PeriodicalIF":4.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145278163","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}

引用次数: 0

Effect of heat treatment on the tribological properties of laser-cladded VTiNbCrFeSi0.2 refractory high-entropy alloy coating 热处理对激光熔覆VTiNbCrFeSi0.2难熔高熵合金涂层摩擦学性能的影响

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-12 DOI: 10.1016/j.intermet.2025.109023

Shiyi Zhang , Yebin Wu , Xuwei Qin , Timing Zhang , Zhuo Zeng , Mingfang Xu , Shanlin Wang , Yuhua Chen

{"title":"Effect of heat treatment on the tribological properties of laser-cladded VTiNbCrFeSi0.2 refractory high-entropy alloy coating","authors":"Shiyi Zhang , Yebin Wu , Xuwei Qin , Timing Zhang , Zhuo Zeng , Mingfang Xu , Shanlin Wang , Yuhua Chen","doi":"10.1016/j.intermet.2025.109023","DOIUrl":"10.1016/j.intermet.2025.109023","url":null,"abstract":"<div><div>In this paper, VTiNbCrFeSi<sub>0.2</sub> HEA coating was prepared by laser cladding technology and the prepared coating was annealed at 1200 °C for 5 h. The effects of the heat treatment on the phase composition, microstructure, and wear resistance of the coating were investigated. The results show that the VTiNbCrFeSi<sub>0.2</sub> coating consists of the BCC phase, Fe<sub>2</sub>Nb-type Laves phase, and dendritic NbTi<sub>4</sub> phase. After annealing for 5 h, the content of the BCC phase increases while the Fe<sub>2</sub>Nb-type Laves phase content decreases. Additionally, the lattice distortion in the coating is reduced after annealing. The hardness of the coating before and after annealing shows a significant improvement compared to the substrate. The average microhardness of the coating before annealing is 790 HV, nearly 3.13 times higher than that of the substrate, and after annealing, the average microhardness of the coating is 409 HV, about 1.64 times higher than that of the substrate. The coating's wear mechanism before annealing is abrasive wear. In contrast, after annealing, the lattice distortion in the coating is weakened, which leads to reduced residual stress in the coating and decreased content of the Laves brittle hard phase, which reduces the cutting of hard abrasive particles and wear debris on the coating during the wear process, resulting in the decrease of friction coefficient, which reasons make the wear resistance of the coating after annealing higher than that before annealing, and the coating after annealing shows a composite wear mechanism of adhesive wear and a small amount of abrasive wear. The results show that heat treatment has a significant effect on the microstructure and properties of the coating, which provides a theoretical basis for the application of the refractory high entropy alloy in high temperature environment.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"187 ","pages":"Article 109023"},"PeriodicalIF":4.8,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145324548","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}

引用次数: 0

Development of corrosion and fretting wear resistant AlCoCrFeNi high entropy alloy coatings prepared by electrodeposition using an aqueous electrolyte 电沉积法制备耐腐蚀微动磨损高熵合金涂层的研究

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-10 DOI: 10.1016/j.intermet.2025.109021

Ashwin Shah , Mahesh Patel , Jayaparakash Murugesan , Rajesh Kumar Rai , Brij Mohan Mundotiya

{"title":"Development of corrosion and fretting wear resistant AlCoCrFeNi high entropy alloy coatings prepared by electrodeposition using an aqueous electrolyte","authors":"Ashwin Shah , Mahesh Patel , Jayaparakash Murugesan , Rajesh Kumar Rai , Brij Mohan Mundotiya","doi":"10.1016/j.intermet.2025.109021","DOIUrl":"10.1016/j.intermet.2025.109021","url":null,"abstract":"<div><div>This work aims to fabricate an AlCoCrFeNi high entropy alloy (HEA) coating on a Cu substrate utilizing a chloride-based aqueous electrolyte through electrodeposition. The corrosion and fretting wear behavior of the deposited HEA coating was examined. All the elements were co-deposited in near equiatomic composition, and the coating surface exhibited uniform globular morphology as indicated by scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy. The deposited HEA coating possessed a single-phase FCC crystal structure. The deposited HEA coating exhibited higher corrosion resistance than the Cu substrate, with a corrosion protection efficiency of 65.34 % and a corrosion current density of 4.12 μA/cm<sup>2</sup>. Furthermore, the fretting wear of the HEA coating decreased by about 43 %, and the friction coefficient was only 0.52 compared to 0.8 for the Cu-substrate. The wear rate of HEA coating was 9.37 x 10<sup>−4</sup> mm<sup>3</sup>N<sup>−1</sup>.m. The wear mechanism in HEA coating was characterized as primary abrasive and delamination wear with minor adhesive wear. The high corrosion resistance of the AlCoCrFeNi HEA coating was attributed to the formation of a stable passive oxides film on its surface, while high wear resistance was due to the high hardness of the coating.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"187 ","pages":"Article 109021"},"PeriodicalIF":4.8,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263022","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}

引用次数: 0

Microstructure and corrosion behavior of Al-Cu intermetallics in laminated sheets Al-Cu金属间化合物在层合板中的微观结构和腐蚀行为

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-10 DOI: 10.1016/j.intermet.2025.109022

Zhipeng Yuan , Yifan Lu , Yiyou Tu , Ting Yuan , Xingxing Wang , Zenglei Ni , Peng Han , Fang Liu , Wenyi Huo

引用次数: 0

Effect of heat treatment temperature on the microstructure and properties of high Ti/Al ratio nickel-based superalloys fabricated by laser powder bed fusion 热处理温度对激光粉末床熔合制备高Ti/Al比镍基高温合金组织和性能的影响

IF 4.8 2区材料科学

Intermetallics Pub Date : 2025-10-08 DOI: 10.1016/j.intermet.2025.109020

Jian Yao, Junkang Wu, Jie Su, Huabo Wu, Zi Wang, Wenli Wang, Liming Tan, Lan Huang, Feng Liu

{"title":"Effect of heat treatment temperature on the microstructure and properties of high Ti/Al ratio nickel-based superalloys fabricated by laser powder bed fusion","authors":"Jian Yao, Junkang Wu, Jie Su, Huabo Wu, Zi Wang, Wenli Wang, Liming Tan, Lan Huang, Feng Liu","doi":"10.1016/j.intermet.2025.109020","DOIUrl":"10.1016/j.intermet.2025.109020","url":null,"abstract":"<div><div>In this study, high Ti/Al ratio (2.35) nickel-based superalloys were successfully fabricated using the laser powder bed fusion (LPBF) technique and systematically investigated how varying heat treatment temperatures influence the alloy's microstructure and mechanical properties. The findings indicate that the high Ti/Al ratio alloy possesses promising printability. At a solid solution temperature of 1180 °C and an aging temperature of 830 °C, the alloy demonstrates an optimal balance of strength and plasticity. This is attributed to the highest degree of recrystallization, the absence of harmful phase precipitation, and a uniform distribution of the γ′ phase. Moreover, a solid solution temperature of 1120 °C leads to η phase precipitation, significantly decreasing the alloy's plasticity. This study not only elucidates the mechanism by which heat treatment temperature affects the structural evolution of high Ti/Al ratio nickel-based superalloys but also offers theoretical support and practical guidance for superalloy material design and future applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"187 ","pages":"Article 109020"},"PeriodicalIF":4.8,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263020","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}

引用次数: 0