{"title":"Effect of deep cryogenic treatment on the microstructure and mechanical properties of an annealed rolled dual-phase high-entropy alloy","authors":"X.M. Zhao, K.K. Li, H.M. Wang, G.R. Li, Z.H. Ma, J.Z. Zhou, J.Q. Liao, Z.J. Ji, X. Zong","doi":"10.1016/j.jallcom.2026.187520","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.187520","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"16 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495475","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}
Pub Date : 2026-03-21DOI: 10.1016/j.jallcom.2026.187522
Ilyas Hussain, Uzoma Vincent Nwankpa, Md Saad Patel, Raja Gopala Chary Thipparthi, Jean Yves Hascoet, Surendar K Marya, R Jose Immanuel
{"title":"Development of Multi-phase Titanium Aluminides through Twin Wire Arc Additive Manufacturing – microstructural analysis and mechanical performance evaluation","authors":"Ilyas Hussain, Uzoma Vincent Nwankpa, Md Saad Patel, Raja Gopala Chary Thipparthi, Jean Yves Hascoet, Surendar K Marya, R Jose Immanuel","doi":"10.1016/j.jallcom.2026.187522","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.187522","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"17 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495479","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}
Pub Date : 2026-03-21DOI: 10.1016/j.jallcom.2026.187515
Haleema Yahya Otaif, Norah Salim Alhebshe, Nujud Maslamani, Ajit Kumar, Fatimah Ali Hussein, Mohammad Shariq, Muzahir Iqbal
Global energy demand, coupled with the diminishing reserves of fossil fuels, underscores the urgent need for sustainable hydrogen generation routes. Electrocatalytic water splitting stands out as a promising strategy to realise clean hydrogen production. In this work, Fe2O3 nanoparticles were attached to the surface of nickel selenide composite (NiSe2@Fe2O3) through a hydrothermal process to promote the hydrogen evolution reaction (HER). The introduction of iron oxide into nickel selenide creates a synergy that enhances electrocatalytic activity. Structural and surface analyses confirmed the formation of an intimate interface that facilitates efficient charge transport and enhances active-site exposure. Electrochemical assessments revealed a remarkably low overpotential of -318 mV at 10 mA cm-2 and a Tafel slope of 67 mV dec-1, reflecting rapid HER kinetics. Long-term stability tests over 96 h further validated the catalyst’s durability under continuous operation. The outstanding performance arises from the synergistic interplay among the multi-metallic components, which collectively enhance electron transfer and catalytic efficiency. This study not only demonstrates a high-performance and stable HER catalyst but also provides valuable insights for designing next-generation multi-component materials for sustainable hydrogen production and clean energy technologies.
全球能源需求，加上化石燃料储量的减少，凸显了对可持续制氢路线的迫切需求。电催化水分解是实现清洁制氢的一种很有前途的策略。本文通过水热法将Fe2O3纳米颗粒附着在硒化镍复合材料（NiSe2@Fe2O3）表面，促进析氢反应（HER）。将氧化铁引入硒化镍中产生协同作用，增强电催化活性。结构和表面分析证实了一个亲密界面的形成，促进了有效的电荷传输和增强活性位点暴露。电化学评估显示，过电位非常低，在10 mA cm-2时为-318 mV， Tafel斜率为67 mV dec1，反映了快速的HER动力学。超过96小时的长期稳定性测试进一步验证了催化剂在连续运行下的耐久性。优异的性能源于多金属组分之间的协同相互作用，共同提高了电子转移和催化效率。该研究不仅展示了一种高性能、稳定的HER催化剂，而且为设计用于可持续制氢和清洁能源技术的下一代多组分材料提供了有价值的见解。
{"title":"Fe2O3 nanoparticle embedded on the surface of NiSe2 composite as efficient and stable binder-free electrocatalyst for hydrogen evolution reaction","authors":"Haleema Yahya Otaif, Norah Salim Alhebshe, Nujud Maslamani, Ajit Kumar, Fatimah Ali Hussein, Mohammad Shariq, Muzahir Iqbal","doi":"10.1016/j.jallcom.2026.187515","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.187515","url":null,"abstract":"Global energy demand, coupled with the diminishing reserves of fossil fuels, underscores the urgent need for sustainable hydrogen generation routes. Electrocatalytic water splitting stands out as a promising strategy to realise clean hydrogen production. In this work, Fe<sub>2</sub>O<sub>3</sub> nanoparticles were attached to the surface of nickel selenide composite (NiSe<sub>2</sub>@Fe<sub>2</sub>O<sub>3</sub>) through a hydrothermal process to promote the hydrogen evolution reaction (HER). The introduction of iron oxide into nickel selenide creates a synergy that enhances electrocatalytic activity. Structural and surface analyses confirmed the formation of an intimate interface that facilitates efficient charge transport and enhances active-site exposure. Electrochemical assessments revealed a remarkably low overpotential of -318 mV at 10<!-- --> <!-- -->mA<!-- --> <!-- -->cm<sup>-2</sup> and a Tafel slope of 67<!-- --> <!-- -->mV dec<sup>-1</sup>, reflecting rapid HER kinetics. Long-term stability tests over 96<!-- --> <!-- -->h further validated the catalyst’s durability under continuous operation. The outstanding performance arises from the synergistic interplay among the multi-metallic components, which collectively enhance electron transfer and catalytic efficiency. This study not only demonstrates a high-performance and stable HER catalyst but also provides valuable insights for designing next-generation multi-component materials for sustainable hydrogen production and clean energy technologies.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"45 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147492726","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}
This study investigates the microstructural evolution, mechanical properties, and corrosion behavior of WE43 alloy microtubes with an outer diameter of 2.5 mm and an inner diameter of 2.0 mm, successfully fabricated via an equal channel angular pressing (ECAP) followed by warm direct tube extrusion. The ECAP-induced heterogeneity served as a precursor for dynamic recrystallization during extrusion, facilitating grain refinement and microstructural homogenization. Subsequent extrusion at 260 °C produced ultrafine grains (UFGs) (~0.9 µm) with a dominant basal texture. The combined effects of grain refinement and texture strengthening yielded a UTS of 329 MPa, approximately 2.2 times that of the as-received sample. Conversely, extrusion at 310 °C induced a complete texture rotation toward prismatic orientation (~1 µm grains), which significantly enhanced ductility (elongation = 23.4%) while preserving high strength (UTS = 302 MPa). Notably, the basal-textured sample (EX260) exhibited superior corrosion resistance with the lowest corrosion current density (3.6 × 10⁻⁵ A/cm²) and a corrosion rate of 0.80 mmpy, approximately 3.3 and 13 times lower than the as-received (T4, 2.68 mmpy) and prismatic-textured (EX310, 10.49 mmpy) samples, respectively. This demonstrates that crystallographic texture is the dominant factor controlling both mechanical performance and degradation behavior. These findings underscore the paramount importance of texture engineering for optimizing the strength-ductility-degradation tradeoff in processed magnesium alloys.
{"title":"Microstructure evolution, mechanical properties, and corrosion behavior of ECAP-pretreated WE43 Mg alloy followed by warm extrusion","authors":"Mehran Torabi Kafshgari, Morteza Rahimi, Mahmoud Reza Ghandehari Ferdowsi, Abbas Akbarzadeh","doi":"10.1016/j.jallcom.2026.187521","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.187521","url":null,"abstract":"This study investigates the microstructural evolution, mechanical properties, and corrosion behavior of WE43 alloy microtubes with an outer diameter of 2.5<!-- --> <!-- -->mm and an inner diameter of 2.0<!-- --> <!-- -->mm, successfully fabricated via an equal channel angular pressing (ECAP) followed by warm direct tube extrusion. The ECAP-induced heterogeneity served as a precursor for dynamic recrystallization during extrusion, facilitating grain refinement and microstructural homogenization. Subsequent extrusion at 260 °C produced ultrafine grains (UFGs) (~0.9<!-- --> <!-- -->µm) with a dominant basal texture. The combined effects of grain refinement and texture strengthening yielded a UTS of 329<!-- --> <!-- -->MPa, approximately 2.2 times that of the as-received sample. Conversely, extrusion at 310 °C induced a complete texture rotation toward prismatic orientation (~1<!-- --> <!-- -->µm grains), which significantly enhanced ductility (elongation = 23.4%) while preserving high strength (UTS = 302<!-- --> <!-- -->MPa). Notably, the basal-textured sample (EX260) exhibited superior corrosion resistance with the lowest corrosion current density (3.6 × 10⁻⁵ A/cm²) and a corrosion rate of 0.80 mmpy, approximately 3.3 and 13 times lower than the as-received (T4, 2.68 mmpy) and prismatic-textured (EX310, 10.49 mmpy) samples, respectively. This demonstrates that crystallographic texture is the dominant factor controlling both mechanical performance and degradation behavior. These findings underscore the paramount importance of texture engineering for optimizing the strength-ductility-degradation tradeoff in processed magnesium alloys.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"13 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495486","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}
Pub Date : 2026-03-21DOI: 10.1016/j.jallcom.2026.187518
Rafael M. Freire, Sebastian Rojas, Alice Vermale, Lilian Khelladi, Felipe J. Valencia, Nicolás Plaza-Alcafuz, Maryoris Jara, Judit Lisoni, Javier Rojas-Nunez, Samuel E. Baltazar
{"title":"Mapping the morphology and thermal stability of AgCo nanoalloys: Composition-driven phase segregation and functional implications","authors":"Rafael M. Freire, Sebastian Rojas, Alice Vermale, Lilian Khelladi, Felipe J. Valencia, Nicolás Plaza-Alcafuz, Maryoris Jara, Judit Lisoni, Javier Rojas-Nunez, Samuel E. Baltazar","doi":"10.1016/j.jallcom.2026.187518","DOIUrl":"https://doi.org/10.1016/j.jallcom.2026.187518","url":null,"abstract":"","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"146 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495471","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}
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