Materials Characterization最新文献

{"title":"Study on the recrystallization behavior, texture evolution, and mechanical properties of metastable β Ti-5Mo-4Cr-1 V-1Zr alloy during solution annealing","authors":"Shuai Zhao ,&nbsp;Yang Wang ,&nbsp;Chengran Chai ,&nbsp;Lin Peng ,&nbsp;Yuanxiang Zhang ,&nbsp;Feng Fang ,&nbsp;Guo Yuan","doi":"10.1016/j.matchar.2025.115422","DOIUrl":"10.1016/j.matchar.2025.115422","url":null,"abstract":"<div><div>The effects of solution annealing on the recrystallization behavior, texture evolution, and mechanical properties of cold-rolled Ti-5Mo-4Cr-1V-1Zr (Ti-5411, wt.%) alloy were investigated. The results indicate that Ti-5411 alloy exhibits rapid recrystallization nucleation at shear bands (SBs) and the boundaries of the fiber deformation zones at 750 °C, followed by the migration of stress-induced high-angle grain boundaries. It is accompanied by delayed nucleation in the fibrous deformation zones, leading to the formation of the heterogeneous microstructure. At 780 °C and 800 °C, a dynamic equilibrium between nucleation and grain boundary migration leads to the formation of more homogeneous microstructures. During recrystallization, the Ti-5411 alloy exhibits pronounced texture inheritance, where oriented nucleation promotes the formation of a dominant TD//&lt;101&gt; orientation. In the GS5.2 sample with fine and more uniform grains, the formation of stress-induced martensite (SIM) α″ transformation and {332}&lt;113&gt; twinning is suppressed, leading to a low elongation (∼15.5 %). In contrast, the heterogeneous GS5.6 sample achieves an excellent elongation (∼37.8 %) while maintaining high strength (yield strength: ∼775 MPa; tensile strength: ∼905 MPa). It is attributed to the synergistic activation of SIM α″ transformation and {332}&lt;113&gt; twinning in the coarse-grained regions, as well as the decrease in dislocation mean free path in the fine-grained regions (Hall-Petch strengthening). In uniform fine-grained microstructures, the critical grain size range for optimal activation of the TRIP and TWIP effects is between ∼7.5 μm and ∼ 8.8 μm. According to the JMAK model, the recrystallization process at 750 °C exhibits site-saturated nucleation. Moreover, recrystallization activation energy is calculated to be ∼431.35 kJ/mol using the Arrhenius equation.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115422"},"PeriodicalIF":5.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763951","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":"Unveiling the non-catastrophic oxidation mechanism of high molybdenum carbon-free high-speed steel using multi-scale characterization","authors":"Fengwei Xie,&nbsp;Ziren Yuan,&nbsp;Luli Feng,&nbsp;Shuaipeng Chen,&nbsp;Ziyi Xu,&nbsp;Yuehui He,&nbsp;Xiyue Kang","doi":"10.1016/j.matchar.2025.115425","DOIUrl":"10.1016/j.matchar.2025.115425","url":null,"abstract":"<div><div>The oxidation mechanism of high‑molybdenum (15 wt%) carbon-free high-speed steel was investigated in air at 650–800 °C for up to 100 h. Contrary to expectations for high-Mo alloys, the steel exhibits parabolic oxidation kinetics and avoids catastrophic oxidation, indicating diffusion-controlled protective scale growth. Multiscale characterization reveals a distinct tri-layer oxide structure: an outer oxide layer (OOL) with a CoFe₂O₄—Fe₂O₃—CoFe₂O₄ configuration lacking FeO, a continuous β-FeMoO₄ inner oxide layer (IOL) and an internal oxidation zone (IOZ) containing dispersed Fe₂Mo₃O₈. The formation of the continuous β-FeMoO₄ is identified as the critical factor governing this behavior. This layer forms in-situ, consuming potentially detrimental MoO₃, and subsequently acts as a highly selective diffusion barrier. Specifically, the IOL significantly impedes outward Co diffusion more than Fe, dictating the unique OOL structure and preventing FeO stabilization. These findings challenge the conventional paradigm that high Mo content invariably results in catastrophic oxidation, demonstrating instead that Mo's adverse effects can be intrinsically mitigated via the formation of stable molybdate phases. This offers novel insights into managing high-Mo alloy oxidation.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115425"},"PeriodicalIF":5.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723394","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":"Entropy engineering in AlTiNbTaZrCrN coatings: Achieving exceptional strength-ductility synergy and non-monotonic oxidation resistance","authors":"Hua D. Zhang ,&nbsp;Xiang D. Zhang ,&nbsp;Yi Kong ,&nbsp;Li Chen ,&nbsp;Qing Mu","doi":"10.1016/j.matchar.2025.115428","DOIUrl":"10.1016/j.matchar.2025.115428","url":null,"abstract":"<div><div>Designing protective coatings with superior mechanical and oxidation properties remains a research priority. In this study, entropy engineering in AlTiN-based coatings via Ti substitution with Me (Nb + Ta + Zr + Cr, approximately equiatomic proportions) achieves configurational entropy tuning while retaining ∼40 at.% Al. All coatings adopt single rock-salt structure, with hardness progressively increasing from ∼28.4 GPa of Al_0.45Ti_0.55N to ∼35.1 GPa of Al_0.40Ti_0.13(Me)_0.47N due to entropy-driven lattice distortion. Simultaneous improvement in Vickers indentation toughness stems from more metallic bonding contributions of higher valence electron concentration elements (Nb/Ta/Cr). Oxidation resistance exhibits non-monotonic entropy dependence: Compared with the complete oxidation failure of other component coatings, medium-entropy Al_0.41Ti_0.37(Me)_0.22N still maintain residual nitride after 1000 °C/10 h oxidation through Me-stabilized anatase-TiO₂ transformation and protective (Al,Cr)₂O₃ layer growth. In contrast, high-entropy variants (≥ 41 at.% Me) suffer accelerated degradation, primarily attributed to microcracking from thermodynamically prioritized oxide co-formation (ZrTiO₄/CrTaO₄/Nb₂O₅/ZrO₂) and reduced growth of protective Al₂O₃ surface layers.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115428"},"PeriodicalIF":4.8,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713975","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 temperature EBSD experiment versus crystallographic reconstruction to study phase transformation induced microstructures - Application examples for steels","authors":"M. Fekih ,&nbsp;T. Martinez Ostormujof ,&nbsp;L. Germain ,&nbsp;M. Piette ,&nbsp;D. Sornin ,&nbsp;N. Gey","doi":"10.1016/j.matchar.2025.115427","DOIUrl":"10.1016/j.matchar.2025.115427","url":null,"abstract":"<div><div>This study explores the capabilities and limitations of high-temperature electron backscatter diffraction (HT-EBSD) and crystallographic reconstruction methods for analyzing microstructure evolution induced by phase transformations in steels. Using a state-of-the-art CMOS detector with infrared filtering enabled EBSD map acquisition of austenite in real time at temperatures up to 1000 °C with acquisition speed over 1000 points per second (pps) and high indexing rates. These direct observations revealed critical features of the austenite microstructure, including annealing twins and grain size heterogeneities, that reconstruction methods typically overlook. Moreover, it was possible to confirm austenite grain refinement through austenitization cycles in a medium carbon steel and to reveal for the first-time ultrafine parent austenite grains in 10 % chromium oxide dispersion strengthened (ODS) steel, a case where reconstruction methods failed. Furthermore, in-situ HT-EBSD provides ground truth validation for reconstruction methods. By monitoring in-situ the martensitic transformation on 10 %Cr steel, we confirmed both the high accuracy of reconstructed parent austenite orientations and validated the average orientation relationship (OR) established through reconstruction methods. Finally, in-situ HT-EBSD could also provide valuable data for refining reconstruction algorithms to overcome their limitations in capturing precise grain morphology and annealing twins. Despite its advantages, HT-EBSD faces challenges including temperature measurement uncertainties and potential surface artifacts. This study ultimately advocates for judicious combination of both methodologies to comprehensively understand microstructure evolution during steel phase transformations, including the “memory effect” during re-austenitization and identification of austenite nucleation sites.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115427"},"PeriodicalIF":5.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144737977","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 mix-rolling process on microstructure and mechanical properties of Mg-14Li-3Al alloy","authors":"Keqiang Su ,&nbsp;Enyu Guo ,&nbsp;Xuejian Wang ,&nbsp;Huijun Kang ,&nbsp;Zongning Chen ,&nbsp;Huanyue Zhang ,&nbsp;Tongmin Wang","doi":"10.1016/j.matchar.2025.115418","DOIUrl":"10.1016/j.matchar.2025.115418","url":null,"abstract":"<div><div>Beta-Li phase Mg-Li alloys exhibit better formability than conventional Mg alloys. However, the low absolute strength of Mg-Li alloys limits their applications as structural materials. To optimize the strength of Mg-14Li-3Al (LA143) alloy, in this work, the Mg-Li alloy plates were hot rolled at 260 °C with no more than 30 % reduction per pass for four passes, followed by room temperature rolling deformation after quenching. Aiming to investigate the effect of mix-rolling process on the microstructure, texture, and mechanical properties. The results show that the ultimate tensile strength, yield strength and elongation of the specimen after mix-rolling process are improved to 311.9 MPa, 307.1 MPa and 13.9 %, respectively. The excellent mechanical property of the mix-rolling specimen is determined by precipitation strengthening, dislocation strengthening and texture strengthening. Detailed analysis reveals that a large number of sub-crystalline structures are formed during the hot rolling process, reducing the area fraction of the precipitation-free zone (PFZ) and promoting the transformation process of β-Li → MgLi₂Al + Mg → AlLi + Mg. Meanwhile, a large number of AlLi phases nucleate and grow at grain boundaries and sub-boundaries, greatly hindering the slip of dislocation. For the room-temperature rolling process, the formation of high-distortion energy regions promotes the enrichment of Mg, which further facilitates the phase transformation process and dislocations pile up near the grain boundary and precipitated phases. The non-uniform stacking of dislocations leads to local sudden yielding, forming the inhomogeneous deformation zone and resulting in the formation of Luders band in the rolling process. In addition, the strong γ-fiber texture and α-fiber texture are formed during the mix-rolling process. Dislocation slippage in PFZ is subjected to the shear action of hard precipitates and the weakening of atomic bonding force between grains by grain boundary precipitates, which leads to local stress concentration and cracks to form, thus forming intergranular or transgranular fracture modes.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115418"},"PeriodicalIF":4.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713976","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":"Effects of Er on η' and T' precipitation strengthening and corrosion resistance in Al-3.7Zn-2.3 Mg-0.1Zr alloy studied by atom probe tomography","authors":"Xueqin Zhang ,&nbsp;Xiaolan Wu ,&nbsp;Peihao Zhao ,&nbsp;Haiyan Cui ,&nbsp;Fangyan He ,&nbsp;Xiangyuan Xiong ,&nbsp;Kunyuan Gao ,&nbsp;Shengping Wen ,&nbsp;Wu Wei ,&nbsp;Li Rong ,&nbsp;Hui Huang ,&nbsp;Zuoren Nie","doi":"10.1016/j.matchar.2025.115419","DOIUrl":"10.1016/j.matchar.2025.115419","url":null,"abstract":"<div><div>The effects of Er on the microstructure, precipitates, and both mechanical and corrosion properties of Al-3.7Zn-2.3 Mg-0.1Zr alloy aged at 120 °C/48 h were studied by transmission electron microscopy (TEM) and atom probe tomography (APT). The addition of 0.10 wt% Er increased the yield strength by 9 % (from 317 ± 6 MPa to 346 ± 4 MPa) and improved the exfoliation corrosion (EXCO) rating from EB to EA. The average grain size was reduced by 46 %, from 165 ± 69 μm to 77 ± 37 μm. APT showed that the volume fraction of precipitates increased to 2.3 times, and the number density increased to 3.3 times. Specifically, the number density and volume fraction of precipitates in the Er-free alloy were 1.34 × 10²³/m³ and 1.38 %, respectively, while in the Er-containing alloy, they increased to 4.36 × 10²³/m³ and 3.22 %. The addition of Er didn't change the types or the phase fraction of precipitates. The precipitates in the Er-free alloy contained 75 % T′ phase and 25 % η′ phase, and in the Er-containing alloy contained 73 % T′ phase and 27 % η′ phase. These quantitative results are important for calculating the thermodynamic equilibrium of the phase transformation and designing new alloys.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115419"},"PeriodicalIF":5.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723464","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":"Fatigue behavior and microstructural evolution of CP-Ti under cryogenic low-cycle fatigue","authors":"Ji Seob An ,&nbsp;Min Ji Jo ,&nbsp;A. Ra Jo ,&nbsp;Myeong Sik Jeong ,&nbsp;Dong-Kyu Kim ,&nbsp;Young Hoon Moon ,&nbsp;Sun Kwang Hwang","doi":"10.1016/j.matchar.2025.115407","DOIUrl":"10.1016/j.matchar.2025.115407","url":null,"abstract":"<div><div>Mechanical twinning plays a crucial role in the plastic deformation of Ti, particularly under cryogenic conditions, where its activation enhances both strength and ductility. However, the role of twinning in cyclic deformation, particularly its interactions with slips and dislocations under low-cycle fatigue (LCF) conditions, remains unclear and requires further investigation. In this study, we investigated the twinning and detwinning behavior of commercially pure titanium (CP-Ti) under cryogenic LCF loading and compared the results with those obtained at room temperature (RT). Strain-controlled LCF tests were performed at a strain amplitude of ±2.0 %. Ex-situ electron backscatter diffraction analysis revealed a significant increase in the twin fraction in specimens tested at cryogenic temperatures (CTs) compared to those tested at RT. In addition, the twin length increased during the early stages of fatigue, with most of the detwinning occurring during the reverse-loading phase of the cycle. Microstructural evolution after LCF at CT, including twin activation, residual twinning, and grain refinement, contributed to improved mechanical properties such as fatigue stress and fatigue life, which was validated through the Hall–Petch relationship and Taylor hardening law. These findings establish a link between twinning behavior, microstructural changes, and fatigue properties in CP-Ti on CT. However, further research is required to better understand the initiation and annihilation of twinning–detwinning, slip, and dislocation, as well as their relationship with mechanical properties under both RT and CT conditions. Understanding these mechanisms can provide deeper insight into the material selection and processing strategies for various structural applications.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115407"},"PeriodicalIF":5.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724376","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":"Dependence of microstructure evolution and mechanical properties on Mn contents in cast Fe(15–21)Mn damping alloys","authors":"Wei He ,&nbsp;Fuchuan Wang ,&nbsp;Jiangqi Lu ,&nbsp;Yongning Wang ,&nbsp;Yu Fu ,&nbsp;Huabei Peng ,&nbsp;Yuhua Wen","doi":"10.1016/j.matchar.2025.115417","DOIUrl":"10.1016/j.matchar.2025.115417","url":null,"abstract":"<div><div>Mechanical properties of cast FeMn binary damping alloys, especially their sensitivity to Mn content, are rarely studied, whereas numerous studies have focused on their hot- or cold-deformation processed counterparts. This work presented the first systematic investigation into the role of Mn content (15–21 %) on microstructure-mechanical property relationships in cast-state FeMn damping alloys, comparing as-cast (AC) and solution-treated (ST) conditions. Experimental results revealed that increasing Mn contents marginally enhanced yield strength while significantly compromising the total elongation of the AC alloys. The solution treatment could remarkably improve their total elongation but had little effect on their yield strength. The deformation induced γ → α' martensitic transformation, through the transformation-induced plasticity (TRIP) effect, governed the evolution of total elongation with the Mn content and solution treatment. The occurrence dependence of deformation induced γ → α' martensitic transformation on the Mn content could be rationalized by the driving force for γ → α' martensitic transformation.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115417"},"PeriodicalIF":5.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144737981","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 texture on anisotropy of mechanical properties in thermo-mechanically controlled processed high strength low alloy steel","authors":"Vladislav Khotinov,&nbsp;Nikolay Urtsev,&nbsp;Maria Zorina,&nbsp;Mikhail Lobanov","doi":"10.1016/j.matchar.2025.115420","DOIUrl":"10.1016/j.matchar.2025.115420","url":null,"abstract":"<div><div>High level mechanical properties of HSLA steel sheets are achieved by means of thermo-mechanically controlled processing (TMCP). Strength, plasticity, ductility and anisotropy thereof are determined by the structural and texture states formed during rolling and subsequent controlled cooling. In this study, the effect of microstructure and crystallographic texture on the anisotropy of the mechanical properties of the industrial HSLA steel specimens is investigated by the means of orientation microscopy, based on the electron backscattered diffraction, and tensile tests. The authors have established that the crystallographic texture of ferrite that is formed upon hot rolling below <em>A</em>_<em>3</em> temperature is close to the texture of bainite that is formed as a result of a multi-path γ → α-transformation; one crystallographic orientation of deformed austenite can result in the formation of up to 24 orientations of the α’ (α)-phase upon controlled accelerated cooling. The geometric orientation of the specimens relative to the rolling direction has little effect on the deformation behaviour of the steel during the tensile tests at the uniform deformation stage. However, this effect becomes significant at the localized necking stage. The structure of the steel after TMCP consists of a large fraction of orientations close to {112}〈110〉 that are characterized with the average Taylor factor (<em>M</em> ∼ 3.0) in the direction of the normal to the rolling plane. This determines the increased deformation value and leads to the formation of an ellipsoid (non-equiaxial) shape of the deformation zone upon fracture.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115420"},"PeriodicalIF":5.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763947","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":"Interfacial microstructure and mechanical properties of diffusion bonding between high-entropy alloys TiNbTaZr and Ti150","authors":"Peilong Fan ,&nbsp;Wei Guo ,&nbsp;Jingru Xin ,&nbsp;Xinlei Ding ,&nbsp;Mian Liu ,&nbsp;Jiangtao Xiong ,&nbsp;Jinglong Li","doi":"10.1016/j.matchar.2025.115410","DOIUrl":"10.1016/j.matchar.2025.115410","url":null,"abstract":"<div><div>This study investigated the diffusion bonding of Ti150 alloy and TiNbTaZr high-entropy alloy (HEA) within the temperature range of 850–975 °C under 15 MPa for 60 min. The interfacial microstructure, phase evolution, and mechanical properties were systematically characterized using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). The results reveal that the joint interface consists of two distinct regions: Region I, dominated by α-Ti, β-Ti and (Ti, Zr)₆Si₃ particle phase, and Region II, comprising a BCC-structured solid solution with high-entropy characteristics. The bonding temperature exerts a profound influence on mechanical properties, with the maximum shear strength reaching 521 MPa at 950 °C. Fractographic analysis confirms a ductile fracture mechanism, characterized by dimple-dominated fracture surfaces, which aligns with the enhanced interfacial bonding at optimal temperatures. These findings provide critical insights into the diffusion bonding behavior of Ti-based alloys and HEAs, offering guidance for optimizing joint performance in high-temperature structural applications.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"228 ","pages":"Article 115410"},"PeriodicalIF":5.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724375","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}