Materialia最新文献

{"title":"Effects of substituting Zn with Ni on the microstructure and tribological behavior of Mg-Y-Zn alloys with a dominant LPSO phase","authors":"Lei Zhang ,&nbsp;Jida Zhang ,&nbsp;Yuxin Cao ,&nbsp;Jiaxin Lai ,&nbsp;Jianhua Li ,&nbsp;Kangxin Ouyang","doi":"10.1016/j.mtla.2026.102686","DOIUrl":"10.1016/j.mtla.2026.102686","url":null,"abstract":"<div><div>This study systematically investigates the effects of substituting Zn with Ni on the microstructure, mechanical properties, and wear behavior of as-cast Mg₈₄Y₈Zn_8-<em>_x</em>Ni<em>_x</em> (<em>x</em> = 0, 4, 8 at.%) alloys with a dominant long-period stacking ordered (LPSO) phase. Microstructural analysis reveals that partial substitution with 4 at.% Ni results in the highest volume fraction of the LPSO phase, reaching 89.3%, and the Mg₈₄Y₈Zn₄Ni₄ alloy exhibits optimal compressive properties, with an ultimate compressive strength of 474.3 MPa and a compressive elongation of 40.6%. However, Ni addition lowers LPSO microhardness. Tribological tests show that the Mg₈₄Y₈Zn₈ alloy offers the lowest volumetric wear rate and most stable friction coefficient across all loads, indicating superior wear resistance. In contrast, the Mg₈₄Y₈Zn₄Ni₄ alloy, despite its high LPSO content and compressive strength, demonstrates the poorest wear performance, highlighting that wear resistance depends more on LPSO hardness than its volume fraction.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102686"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synchrotron evidence reveals ion-mediated self-repair of mineralized tissue in silver-fluoride–ionomer reinforced carious dentin","authors":"Xuefei Chen ,&nbsp;Go Inoue ,&nbsp;Hiroshi Sekiguchi ,&nbsp;Lin Fan ,&nbsp;Boyu Ning ,&nbsp;Morihiro Takamatsu ,&nbsp;Takashi Ohya ,&nbsp;Yasushi Shimada","doi":"10.1016/j.mtla.2026.102694","DOIUrl":"10.1016/j.mtla.2026.102694","url":null,"abstract":"<div><div>Conventional caries management relies on mechanical excavation, which inevitably removes potentially remineralizable tissue. This study demonstrates that caries-affected dentin can regain structural and mechanical integrity without tissue removal through ion-mediated self-repair. Extracted human teeth with natural root caries were treated with silver diamine fluoride (S), glass ionomer cement (G), or their combination (SG), and stored in artificial saliva for up to 6 months. Specimens were evaluated using micro-computed tomography (micro-CT), synchrotron-based wide-angle X-ray scattering (WAXS), and nanoindentation. Micro-CT revealed a time-dependent mineral gain in the SG group, while WAXS revealed fluorapatite-like and silver-substituted hydroxyapatite (HAp) phases, along with distinctive correlation peaks indicating ionic cross-linking at the dentin–GIC interface. Nanoindentation confirmed significant mechanical reinforcement after 6 months, with the highest nanohardness in the SG group. The results suggest that silver and fluoride ions from SDF were stabilized and gradually migrated through the GIC layer, promoting lattice reorganization and interfacial reinforcement within the underlying dentin. These findings provide mechanistic evidence that SDF beneath GIC facilitates self-repair of demineralized dentin through sustained ionic migration and structural reorganization, combining antimicrobial action with ion-mediated structural reinforcement. This ion-mediated self-repair concept supports a non-cutting minimally invasive strategy that preserves carious dentin and enhances substrate resilience.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102694"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147420691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physics-informed and interpretable machine learning for elastic constants of RHEAs","authors":"Ravindranadh Bobbili","doi":"10.1016/j.mtla.2026.102682","DOIUrl":"10.1016/j.mtla.2026.102682","url":null,"abstract":"<div><div>The accelerated discovery of refractory high-entropy alloys (RHEAs) requires predictive frameworks that combine computational accuracy, physical transparency, and experimental reliability. We present an explainable framework that integrates ensemble learning, symbolic regression, and physics-informed neural networks (PINNs) to predict elastic constants of RHEAs. The model is trained on a curated set of 182 compositions using six physically grounded descriptors: valence electron concentration (VEC), atomic size mismatch, mixing entropy, mixing enthalpy, melting temperature, and electronegativity variance. To our knowledge, this is the first systematic RHEA study that simultaneously reaches DFT-level accuracy, enforces elastic-stability physics during training, and validates predictions against a held-out experimental set. The framework achieves R² above 0.95 on DFT data and above 0.92 on 25 fully unseen experimental measurements. The PINN predicts the single-crystal elastic constants (C11, C12, C44) under Born–Huang stability constraints and maps them to polycrystalline Young’s modulus, shear modulus, and bulk modulus using Voigt–Reuss–Hill (VRH) averaging for one-to-one comparison with experiments. SHAP and symbolic regression provide interpretability, consistently identifying VEC as the dominant stiffness driver and atomic size mismatch as the principal shear-softening factor. Mechanistically, increasing VEC fills bonding <span>d</span>-states and lowers the density of states at the Fermi level, strengthening metallic bonds and raising C11, bulk modulus, and shear modulus. Interaction analyses reveal a nonlinear coupling between configurational entropy and VEC, in which chemical randomness perturbs local crystal fields and reshapes the <span>d</span>-band, thereby modulating the VEC-driven stiffening. Bootstrap ensembling supplies calibrated prediction intervals, turning outputs into risk-aware design guidance. Overall, this experimentally validated, physics-constrained, and explainable framework provides trustworthy elasticity predictions and actionable insights for designing RHEAs for aerospace turbines, nuclear cladding, and energy systems.</div><div>In addition, we benchmark the framework against a conventional rule-of-mixtures baseline and discuss its extension to plastic deformation properties, highlighting the benefits and limitations of the present elasticity-focused study.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102682"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147420692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystallographic aspects of the βo → γ decomposition in an intermetallic Ti-44Al-7Mo alloy","authors":"Petra Spoerk-Erdely ,&nbsp;Gloria Graf ,&nbsp;Christoph Gammer ,&nbsp;Simon Fellner ,&nbsp;Peter Presoly ,&nbsp;Johanna Byloff ,&nbsp;Helmut Clemens ,&nbsp;Andreas Stark ,&nbsp;Peter Staron","doi":"10.1016/j.mtla.2026.102696","DOIUrl":"10.1016/j.mtla.2026.102696","url":null,"abstract":"<div><div>Essential to many intermetallic systems, the ordered β_o (B2) phase is also gaining increasing interest in γ-TiAl based alloys for lightweight high-temperature applications. This study focuses on the crystallographic aspects of β_o decomposition during continuous heating of a supersaturated, β-homogenised Ti-44Al-7Mo (at.%) alloy. Using differential scanning calorimetry, transmission electron microscopy (TEM), and in-situ high-energy synchrotron X-ray diffraction (HEXRD), we demonstrate that the β_o → γ phase transformation occurs in two stages, involving the precipitation and growth of two distinct γ populations. New experimental evidence on the interfaces and orientation relationships between particles and matrix is provided, including a description of coherent γ particles obeying a Bain-type orientation relationship. Diffuse streaks in reciprocal space (TEM, HEXRD) suggest a displacive instability of the quenched B2 phase, while vectorial streaks during heating (in-situ HEXRD) evidence the appearance of the Kurdjumov-Sachs orientation relationship in the final transformation stage.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102696"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147420710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Friction consolidation as a sustainable circular manufacturing solution for critical mineral recovery in IN617 and A709 alloys","authors":"Subhashish Meher,&nbsp;Tianhao Wang,&nbsp;Mohan Sai Kiran Kumar Yadav Nartu,&nbsp;David Garcia,&nbsp;Chinthaka M Silva,&nbsp;Jorge F dos Santos,&nbsp;Isabella J. van Rooyen","doi":"10.1016/j.mtla.2026.102702","DOIUrl":"10.1016/j.mtla.2026.102702","url":null,"abstract":"<div><div>Critical mineral supply chain limitations and the strategic importance of material conservation drive the urgent need for efficient recycling of high-value alloys. Traditional recycling through energy-intensive remelting causes compositional losses of critical minerals, exacerbating supply risks. This study demonstrates friction consolidation (FC) as a circular manufacturing solution that transforms machining waste into feedstock candidate, enhancing supply chain resilience for A709 steel and Inconel 617. FC employs solid-state processing to convert chips directly into dense billets without melting, preserving critical alloying elements such as nickel, cobalt, and chromium. A709 steel and Inconel 617 chips achieved ∼90 % relative density under optimized axial loads (20 kN and 65 kN, respectively). Microstructural transformation of starting chip material into fine grains (2–5 μm) increased hardness by 30–60 % for A709 and 50 % for Inconel 617. FC provides circular manufacturing that transforms machining waste into feedstock candidate, achieving superior yield and enhanced supply chain security.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102702"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147420711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative analysis of the geometric fidelity of human bone twins produced by additive manufacturing in hydroxyapatite and Ti-6Al-4V alloy","authors":"Fanny Leborgne ,&nbsp;Donatien Campion ,&nbsp;Paul Danty ,&nbsp;Patricia Pascaud-Mathieu ,&nbsp;Jean-Claude Grandidier","doi":"10.1016/j.mtla.2025.102641","DOIUrl":"10.1016/j.mtla.2025.102641","url":null,"abstract":"<div><div>Additive manufacturing (AM) opens new opportunities in producing complex shape architectures such as bone scaffolds. Bone tissue features an interconnected lattice microstructure with high porosity and thin wall thickness which are difficult to reproduce with the current AM processes spatial resolutions. This study aims at assessing the feasibility of replicating a human trabecular bone microstructure through laser powder bed fusion and vat-photopolymerization additive technologies. To this purpose, three bone samples were harvested from the tibias of fresh human cadavers and scanned through X-Ray micro-computed tomography. The microstructure of one of these samples was then mimicked using both a Ti-6Al-4V ELI (TA6V) powder and a hydroxyapatite (HA) slurry, shaped by AM processes. The as-built parts were scanned to compare their geometries with the nominal bone model at macroscopic and microscopic scales. This analysis was carried out through image processing by quantifying the dimensional deviations from the reference model on the one hand and by measuring the microstructure parameters on the other hand. Results have shown that the geometries of the TA6V and HA printed parts closely match the bone reference model with dimensional deviations up to 0.02 ± 0.07 mm and 0.06 ± 0.20 mm at scale 1:1 for TA6V and HA replicas respectively. At microscopic level, the material volume fraction of the printed parts is higher than that of the reference model, indicating that further manufacturing parameters optimizations are required to improve the processes resolutions to achieve bone trabeculae characteristic size.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102641"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms of fire resistance deterioration in chinese fir induced by environmental aging","authors":"JiaLan Ma ,&nbsp;YaChao Wang ,&nbsp;JiangPing Zhao ,&nbsp;HongGang Yang","doi":"10.1016/j.mtla.2026.102656","DOIUrl":"10.1016/j.mtla.2026.102656","url":null,"abstract":"<div><div>Chinese fir, commonly used in ancient Chinese architecture, is prone to aging due to prolonged exposure to environmental factors such as UV radiation, temperature fluctuations, and salt spray. This aging process not only alters its microstructure but also significantly weakens its fire resistance, potentially compromising the safety of cultural heritage. To investigate the specific impact of environmental aging on the deterioration of fire resistance in Chinese fir, accelerated aging experiments involving UV aging, high-low temperature cycling, and salt spray erosion are conducted. The results indicate that UV radiation induces lignin degradation in the wood, resulting in an increased heat release rate (HRR) peak to 171 kW/m². High-low temperature cycling results in the formation of microcracks in the wood, causing the peak smoke temperature to reach 88.6 kW/m². During salt spray erosion, the catalytic effect of Cl^- promotes polysaccharide hydrolysis, which facilitates the formation of dense carbon, reducing the HRR peak to 112 kW/m². Additionally, the three-level correlation model is established to link environmental stresses, microscopic damage, and combustion reactions. This model reveals the cross-scale causal chain of Chinese Fir, from macro-environmental factors to microscopic damage, and finally to its combustion behavior. This analysis provides an in-depth examination of how various environmental factors influence the fire resistance properties of wood by altering its microstructure, offering a theoretical framework for investigating the aging process of wood materials and enhancing fire resistance performance. It is especially applicable to the preservation and safety assessment of ancient architecture's wooden materials.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102656"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “An insight into the structural interpretation of network modification in Alkali-fluoroborosilicate glasses for its applicability in green luminescence and radiation shielding” [Materialia 33C (2024) 101995]","authors":"Adon Jose ,&nbsp;T Krishnapriya ,&nbsp;Anitta Rose Varghese ,&nbsp;Arya Gopinath ,&nbsp;P.A. Shahina ,&nbsp;Tony Thomas ,&nbsp;Ansu James ,&nbsp;Cyriac Joseph ,&nbsp;P.R. Biju","doi":"10.1016/j.mtla.2026.102684","DOIUrl":"10.1016/j.mtla.2026.102684","url":null,"abstract":"","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102684"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147420712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of oxides on atomized 316L stainless steel powders","authors":"Salima Benrabah ,&nbsp;Yoann Danlos ,&nbsp;Christophe Verdy ,&nbsp;Olivier Heintz ,&nbsp;Régis Parvaud ,&nbsp;Cécile Langlade","doi":"10.1016/j.mtla.2026.102659","DOIUrl":"10.1016/j.mtla.2026.102659","url":null,"abstract":"<div><div>Oxides in atomized 316L stainless steel powders critically affect their behavior during additive manufacturing and sintering processes, as well as the impact toughness of the final components. This study characterizes eight 316L powders produced by different atomization techniques, with varying particle size distributions and oxygen levels. X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were used to analyze the composition and morphology of the oxides. The results show that the particle surface oxides were primarily composed of (Cr₂O₃) and iron oxides, with nodules of manganese and silicon oxides observed in some samples. No silicon oxides were detected on the particles surface with oxygen levels around 200 ppm. In addition to surface oxides, internal oxide nanoparticles were also identified. The study demonstrates that the oxidation state is strongly influenced by the oxygen content, atomization process, and raw material properties, offering valuable insights for optimizing powder performance in metallurgical applications.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102659"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlative investigation of microstructure, localized corrosion behavior and mechanical properties in hot rolled Mg-Zn-Ca-xEr (x = 0.75, 2, 5, 8 wt%) biodegradable alloys for orthopedic applications","authors":"Divyanshu Aggarwal ,&nbsp;Vamsi Krishna Pakki ,&nbsp;Sachin Latiyan ,&nbsp;Rajesh K. Rajendran ,&nbsp;Suraj Singh ,&nbsp;Kapil K Gupta ,&nbsp;Rajan Ambat ,&nbsp;Kaushik Chatterjee ,&nbsp;Satyam Suwas ,&nbsp;Rajashekhara Shabadi","doi":"10.1016/j.mtla.2025.102643","DOIUrl":"10.1016/j.mtla.2025.102643","url":null,"abstract":"<div><div>Magnesium alloys hold immense potential for biodegradable orthopedic implants, yet their rapid degradation, coarse microstructure, and limited ductility hinder clinical translation. This study investigates a novel Mg–1.5Zn–0.5Ca alloy system modified with varying rare earth Erbium (Er) additions (0.75, 2, 5, 8 wt%) and processed through a sequential route of casting, homogenization, and symmetric hot rolling to simultaneously enhance mechanical performance, corrosion resistance, and cytocompatibility. Comprehensive characterization using SEM, EDS, XRD, and EBSD, revealed that 2 wt% Er produced the most refined microstructure, weakened basal texture and uniform W-phase dispersion. In addition, rolling significantly improved grain morphology and suppressed galvanic intermetallic networks, correlating with superior tensile properties (UTS ≈ 236 MPa, elongation ≈ 29 %) and minimized corrosion activity, as confirmed by electrochemical and immersion analyses. Moreover, SECM technique was introduced that demonstrated the lowest localized electrochemical current in 2 wt% Er alloy in rolled state, indicating stable degradation behavior. In addition cytocompatibility assessment using MC3T3-E1 cells validated cell viability above 70 %, meeting ISO 10,993–5 and USFDA standards. This integrated processing–composition approach establishes the rolled Er alloy as a promising candidate for next-generation biodegradable Mg implants, offering an optimal balance of mechanical integrity, corrosion control, and biological safety.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"45 ","pages":"Article 102643"},"PeriodicalIF":2.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}