Materialia最新文献_第10页

CFD-integrated kinetic model for high-temperature iron oxidation in multispecies reactive environments 多组分反应环境下高温铁氧化cfd集成动力学模型

IF 3

Materialia Pub Date : 2025-06-19 DOI: 10.1016/j.mtla.2025.102464

M.A. Gómez , J.M. Casal , L. González-Gil , C. Álvarez-Bermúdez , J. Porteiro

{"title":"CFD-integrated kinetic model for high-temperature iron oxidation in multispecies reactive environments","authors":"M.A. Gómez , J.M. Casal , L. González-Gil , C. Álvarez-Bermúdez , J. Porteiro","doi":"10.1016/j.mtla.2025.102464","DOIUrl":"10.1016/j.mtla.2025.102464","url":null,"abstract":"<div><div>This paper introduces a novel model that integrates the high-temperature kinetics of iron oxidation into a CFD framework, aiming to predict oxide scale evolution in complex systems such as combustion furnaces. Considering atmospheres with O<sub>2</sub>, CO<sub>2</sub>, CO, H<sub>2</sub>O, and H<sub>2</sub> as reactive species, the model employs CFD techniques to accurately forecast local gas composition, enabling the application of the oxidation model to each element of the iron surface. The scale evolution is represented by either linear or parabolic growth, depending on whether oxidation kinetics or ion diffusion across the scale is the limiting factor.</div><div>Simulations are conducted on an experimental reactor where low-carbon iron samples undergo oxidation in various atmospheres and temperatures (900 °C to 1200 °C). Comparisons with the measured gained mass show satisfactory agreement, particularly in oxygen atmospheres at high temperatures and regarding the linear growth predicted in 10 % CO<sub>2</sub> or 10 % H<sub>2</sub>O atmospheres. The model also performs reasonably well in quaternary atmospheres, with discrepancies attributed to initial linear constants at lower temperatures. Despite these challenges, the model demonstrates favorable performance in representing the parabolic growth observed in the tests. Overall, in intricate operational scenarios with numerous parameters, the model's performance is reasonably favorable, which allows the simulation of iron oxidation in complex reactors or combustion systems.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102464"},"PeriodicalIF":3.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364366","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}

引用次数: 0

Effect of precompression on the thermal cycling stability of glass-to-metal seals 预压缩对玻璃-金属密封热循环稳定性的影响

IF 3

Materialia Pub Date : 2025-06-18 DOI: 10.1016/j.mtla.2025.102466

Zhangjing Shi , Keqian Gong , Zifeng Song , Zheng Liu , Chao Zhou , Yangyang Cai , Yanfei Sun , Cheng Ren , Yong Zhang

{"title":"Effect of precompression on the thermal cycling stability of glass-to-metal seals","authors":"Zhangjing Shi , Keqian Gong , Zifeng Song , Zheng Liu , Chao Zhou , Yangyang Cai , Yanfei Sun , Cheng Ren , Yong Zhang","doi":"10.1016/j.mtla.2025.102466","DOIUrl":"10.1016/j.mtla.2025.102466","url":null,"abstract":"<div><div>Hermeticity is a critical performance attribute of glass-to-metal (GTM) compressive seals, whose long-term reliability is often compromised by crack initiation and propagation. These failures primarily originate from the nonuniform stress distribution on the GTM seal surface and the inherent material properties, such as the weak mechanical strength, both of which exacerbate structural vulnerabilities over prolonged service periods. In this study, precompression was introduced during the heat treatment stage as a means to increase the thermal cycling stability of GTM seals. The results indicated a proportional relationship between the precompression stress and the thermal cycling stability of GTM seals. Porosity analysis was conducted on three different samples, which demonstrated that precompression improved the distribution of bubbles within the GTM seals, as evidenced by a reduction in the porosity and a decrease in the bubble size. In addition, the mechanical properties of the sealing glass were enhanced, thereby reducing the probability of leakage. Furthermore, nanoindentation measurements and finite element analysis of the surface stress distribution revealed that precompression led to an increase in residual compressive stress. The alleviation of stress concentration regions significantly lowered the probability of crack initiation during thermal cycling, thus establishing a more uniform stress distribution and enhancing the thermal stability of GTM seals.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102466"},"PeriodicalIF":3.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331297","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}

引用次数: 0

The role of solute clusters in the nucleation of precipitates in Al–Mg–Si–Cu alloys Al-Mg-Si-Cu合金中溶质团簇在析出相成核中的作用

IF 3

Materialia Pub Date : 2025-06-16 DOI: 10.1016/j.mtla.2025.102448

J.R. Famelton , C.A. Williams , C. Barbatti , P.A.J. Bagot , M.P. Moody

引用次数: 0

Slip vs. Twin martensite in additively manufactured Ti-6Al-4V: A grain boundary perspective 增材制造Ti-6Al-4V中的滑移与双马氏体：晶界视角

IF 3

Materialia Pub Date : 2025-06-13 DOI: 10.1016/j.mtla.2025.102463

Vikrant Saumitra , Avinash Gonnabattula , V. Anil Kumar , Anand K Kanjarla

{"title":"Slip vs. Twin martensite in additively manufactured Ti-6Al-4V: A grain boundary perspective","authors":"Vikrant Saumitra , Avinash Gonnabattula , V. Anil Kumar , Anand K Kanjarla","doi":"10.1016/j.mtla.2025.102463","DOIUrl":"10.1016/j.mtla.2025.102463","url":null,"abstract":"<div><div>There is an ongoing debate regarding whether martensitic transformation in Ti alloys is governed by slip or twin-based mechanisms. The mechanism that predominates depends on lattice parameter changes caused by composition. For instance, CP-Ti typically under- goes slip-based transformation, while Ti-6Al-4V tends to favor twin-based transformation. However, processing conditions, particularly in additive manufacturing (AM), can introduce lattice strains and alter lattice parameters, resulting in distinct martensitic transformation mechanisms. Both mechanisms influence the variant selection and the formation of character- istic variant cluster morphologies, such as triangular (slip-based) and V-shaped (twin-based), which in turn dictate the selection of intervariant boundaries (IBs). This study explores the characteristics and network of IBs in Ti-6Al-4V for two distinct AM processes: Laser-Powder Bed Fusion (L-PBF) and Wire Laser-Direct Energy Deposition (L-DED). The sympathetic approach to variant selection is extended to the selection of IB and twin boundaries. Key features of the IB network, including triple points and dihedral angles, are examined to pro- vide a deeper understanding of the stability, configuration, and correlation of grain boundary networks with variant selection mechanisms. It is observed that V-shaped clusters dominate in L-DED, while triangular clusters are more common in L-PBF. Furthermore, L-DED ex- hibits a higher fraction of Σ13<em>b</em> twin boundaries than L-PBF samples. These findings suggest that martensitic transformation in L-DED is primarily twin-based, whereas in L-PBF, it is more likely to be slip-based. The sympathetic approach provides valuable insights into the martensitic transformation mechanisms in Ti alloys.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102463"},"PeriodicalIF":3.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297865","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}

引用次数: 0

Preparation and thermal properties of a new hydrated salt phase change material without phase separation 一种新型无相分离水合盐相变材料的制备及其热性能

IF 3

Materialia Pub Date : 2025-06-12 DOI: 10.1016/j.mtla.2025.102462

Chuang Wang , Pengcheng Liu , Xingxing Cheng , Yiteng Zhang , Zhiqiang Wang

{"title":"Preparation and thermal properties of a new hydrated salt phase change material without phase separation","authors":"Chuang Wang , Pengcheng Liu , Xingxing Cheng , Yiteng Zhang , Zhiqiang Wang","doi":"10.1016/j.mtla.2025.102462","DOIUrl":"10.1016/j.mtla.2025.102462","url":null,"abstract":"<div><div>This article discusses the use of hydrated salts as phase change materials for heat accumulators in distributed energy systems. Despite their potential, challenges like phase separation and supercooling hinder their widespread use. Common solutions with nucleating agents and thickeners often fall short. The study explores permanent solutions through composite materials and investigates new ways to maintain stability. Two new eutectic hydrated salts are introduced: SAT+SMN (sodium acetate trihydrate + sodium metasilicate nonahydrate) and SAT+LAD (sodium acetate trihydrate + lithium acetate dihydrate). The common ion effect reduces the solubility of nucleating agents, creating durable crystal seeds to trigger nucleation and reduce supercooling. In terms of thermal properties, SAT+SMN with a 20 % SMN mass fraction has a melting point of 52.2 °C and a latent heat of 248.4 J/g. SAT+LAD with a 10 % LAD mass fraction melts at 49.7 °C with a latent heat of 212.8 J/g. Supercooling in SAT+SMN is reduced to less than 0.5 °C, and in SAT+LAD, it drops to less than 3 °C. After 500 cycles, SAT+SMN maintains a supercooling degree within 0.5 °C with only a 0.02 % decrease in latent heat, demonstrating excellent thermal stability. The introduction of hydrated salts with more polar molecules in SAT increases the difference in the number of hydrogen bonds and bond energy between the solid and liquid states. This leads to new crystals with different lattice parameters and smaller cell sizes. While traditional stirring achieves uniform mixing up to 2 μm, ultrasonic mixing allows for a more even distribution, crucial for effective heat storage.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102462"},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605615","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}

引用次数: 0

Compression properties, in vitro degradation behavior and biocompatibility of porous Mg-1Zn-1Ca-0.5Mn scaffolds with different pore structures 不同孔结构Mg-1Zn-1Ca-0.5Mn多孔支架的压缩性能、体外降解行为及生物相容性

IF 3

Materialia Pub Date : 2025-06-11 DOI: 10.1016/j.mtla.2025.102460

Zhe Li , Leiting Yu , Shi Qiu , Baoli Zhou , Shaoyuan Lyu , Wei Li , Minfang Chen

{"title":"Compression properties, in vitro degradation behavior and biocompatibility of porous Mg-1Zn-1Ca-0.5Mn scaffolds with different pore structures","authors":"Zhe Li , Leiting Yu , Shi Qiu , Baoli Zhou , Shaoyuan Lyu , Wei Li , Minfang Chen","doi":"10.1016/j.mtla.2025.102460","DOIUrl":"10.1016/j.mtla.2025.102460","url":null,"abstract":"<div><div>The pore shape and connectivity of porous Mg alloy scaffolds are of crucial significance for their mechanical properties, degradability, and biocompatibility. In this study, porous Mg-1Zn-1Ca-0.5Mn scaffolds with different pore structures were designed and manufactured using negative salt templates and infiltration casting to compare their properties. The results show that in terms of mechanical properties, the yield strength of the porous spherical scaffold, reaching 13.5 MPa, is higher than that of the porous cubic scaffold (4.9 MPa). Regarding degradability, the corrosion rate of the spherical scaffold (0.69±0.09 mm/year) is lower than cubic scaffold (1.09±0.12 mm/year), For biocompatibility, the pore structure of the porous spherical scaffold shows better cell adhesion compared to the cubic scaffold. The better mechanical property of the spherical scaffold can be attributed to the unique connectivity of its spherical pore structure, which enables more efficient stress dispersion, thus strengthening the overall mechanical strength. The better corrosion resistance is because the spherical scaffold has the more uniform pores and less contact area with the HBSS. As for biocompatibility, the uniform curvature of the spherical pore edges minimizes stress concentration, creating a stable mechanical environment for cells. The spherical shape closely aligns with the natural morphology of cells, which may promote cell spread and migration. Also, the continuous edges and absence of sharp corners in spherical pores reduce the mechanical stress during cell adhesion and have certain effects on enhancing cell adhesion and proliferation.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102460"},"PeriodicalIF":3.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270872","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}

引用次数: 0

Quantitative analysis of hydrogen absorption in pure aluminum: Theoretical and experimental approaches 纯铝中氢吸收的定量分析：理论和实验方法

IF 3

Materialia Pub Date : 2025-06-10 DOI: 10.1016/j.mtla.2025.102449

Akio Ishii, Keitaro Horikawa

{"title":"Quantitative analysis of hydrogen absorption in pure aluminum: Theoretical and experimental approaches","authors":"Akio Ishii, Keitaro Horikawa","doi":"10.1016/j.mtla.2025.102449","DOIUrl":"10.1016/j.mtla.2025.102449","url":null,"abstract":"<div><div>In this study, we quantitatively investigated the hydrogen absorption in pure Al under surface exposure to high-pressure hydrogen gas or water from both theoretical and experimental perspectives. From a theoretical perspective, we implemented a non-empirical multiscale analysis of the temporal evolution of hydrogen concentration in face-centered cubic Al under exposure of the <span><math><mrow><mo>(</mo><mn>111</mn><mo>)</mo></mrow></math></span> surface to high-pressure hydrogen gas or water using density functional theory and a recently proposed simple kinetic model. From an experimental perspective, we developed a method to introduce hydrogen onto the Al surface without an oxide layer in the presence of water by utilizing surface friction in water (FW). After the FW process, the amount of hydrogen absorbed was measured via thermal desorption analysis. The theoretical and experimental results agreed well, and the estimated hydrogen concentration in the bulk under water conditions was approximately 100 mass ppb, although we theoretically confirmed that the absorption of hydrogen in bulk Al under high-pressure hydrogen gas conditions (70 MPa) was negligible; the concentration in the bulk was only <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>6</mn></mrow></msup></mrow></math></span> mass ppb. We also performed a tensile test on a hydrogen-charged pure Al sample to investigate the effect of hydrogen on the tensile properties and confirmed that 100 mass ppb order hydrogen charging in Al significantly reduces the tensile strength of Al.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102449"},"PeriodicalIF":3.0,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307786","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}

引用次数: 0

Application of 3D printed calcium phosphate cement scaffolds in open wedge high tibial osteotomy (owHTO) – A retrospective clinical evaluation 3D打印磷酸钙水泥支架在开楔高位胫骨截骨术中的应用——回顾性临床评价

IF 3

Materialia Pub Date : 2025-06-07 DOI: 10.1016/j.mtla.2025.102459

Richard Frank Richter , Frank Pries , Volker Alt , Anja Lode , Sascha Heinemann

引用次数: 0

Effect of pre-deformation and subsolvus heat treatment on microstructure and mechanical properties of a PM nickel superalloy 预变形和亚溶热处理对PM镍高温合金组织和力学性能的影响

IF 3

Materialia Pub Date : 2025-06-07 DOI: 10.1016/j.mtla.2025.102445

A.A. Ganeev, V.A. Valitov, Sh.Kh. Mukhtarov, V.M. Imayev

{"title":"Effect of pre-deformation and subsolvus heat treatment on microstructure and mechanical properties of a PM nickel superalloy","authors":"A.A. Ganeev, V.A. Valitov, Sh.Kh. Mukhtarov, V.M. Imayev","doi":"10.1016/j.mtla.2025.102445","DOIUrl":"10.1016/j.mtla.2025.102445","url":null,"abstract":"<div><div>In the present work, the effect of the super- and subsolvus solid solution heat treatment with intermediate pre-deformation (ε=6 and 12 %) at subsolvus temperature and final aging on the microstructure and mechanical properties of the Russian powder metallurgy (PM) nickel base superalloy EP741NP has been studied. The experiments were aimed at achieving serrated grain boundaries to improve the creep resistance and reduce crack growth rate. The as-HIPed material was forged at subsolvus temperatures followed by cutting the workpieces for subsequent processing. Three processing routes were applied: i) solid solution treatment at supersolvus temperature with slow cooling and at subsolvus temperature followed by air cooling and aging; ii) the same with 6 % pre-deformation before subsolvus solution treatment and iii) the same with 12 % pre-deformation before subsolvus solution treatment. As a result, three microstructural conditions were obtained. With increasing pre-deformation from 0 to 12 %, the degree of grain boundary serration and the dislocation substructure density increased. Tensile and impact tests showed that 6–12 % pre-deformation led to more ductile fracture and slightly higher ductility at 650 °C. The 6 % pre-deformation condition also exhibited higher creep resistance and impact strength, which was attributed to the positive effect of serrated grain boundaries and dislocation substructure.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102445"},"PeriodicalIF":3.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240625","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}

引用次数: 0

Oxidation behavior of tantalum in high temperature molecular and dissociated oxygen 钽在高温分子氧和解离氧中的氧化行为

IF 3

Materialia Pub Date : 2025-06-06 DOI: 10.1016/j.mtla.2025.102458

C.J. Stephens, S.K. Donaldson, M.N. Richwine, C.J. Recupero, E.J. Opila

{"title":"Oxidation behavior of tantalum in high temperature molecular and dissociated oxygen","authors":"C.J. Stephens, S.K. Donaldson, M.N. Richwine, C.J. Recupero, E.J. Opila","doi":"10.1016/j.mtla.2025.102458","DOIUrl":"10.1016/j.mtla.2025.102458","url":null,"abstract":"<div><div>Tantalum (Ta) was oxidized in a new resistive heating system equipped with a DC microplasma capable of heating samples to 2400 °C via Joule heating in a molecular or dissociated oxygen environment. Oxidation was conducted at 1300 °C, 1400 °C, and 1500 °C for 2.5 and 5 min in molecular or partially-dissociated 1 % O<sub>2</sub> – balance Ar. The presence of atomic oxygen is verified through emission spectroscopy and quantified via Kapton HN erosion studies. The degree of dissociation is estimated as ∼40 %. In molecular oxygen, the thickness of the oxide grown on Ta decreased as temperature increased, suggesting the formation of a more protective scale. Gas-phase diffusion through cracks in the oxide is identified as the rate-limiting process. For oxidation in atomic oxygen at 1300 °C and 1400 °C, the highly cracked oxide provided no barrier to atomic oxygen ingress and the extent of oxidation increased ten-fold. At 1500 °C, the more protective oxide scale prevented rapid atomic oxygen ingress, and the oxide thickness is unchanged relative to that observed in molecular oxygen. Atomic oxygen exposures are effective for identifying non-protective scales.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102458"},"PeriodicalIF":3.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144366146","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}

引用次数: 0