Scripta Materialia最新文献

Severe plastic deformation promoted simultaneous enhancement in strength and ductility of multilayer MXene/Ag matrix composites

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-22 DOI: 10.1016/j.scriptamat.2025.116612

Yunsong Xu , Weiwei Zhou , Li-Fu Yi , Itsuki Kubo , Zhenxing Zhou , Zhong-Chun Chen , Naoyuki Nomura

{"title":"Severe plastic deformation promoted simultaneous enhancement in strength and ductility of multilayer MXene/Ag matrix composites","authors":"Yunsong Xu , Weiwei Zhou , Li-Fu Yi , Itsuki Kubo , Zhenxing Zhou , Zhong-Chun Chen , Naoyuki Nomura","doi":"10.1016/j.scriptamat.2025.116612","DOIUrl":"10.1016/j.scriptamat.2025.116612","url":null,"abstract":"<div><div>The insufficient mechanical performance of Ag poses a critical challenge for its application as an electrical contact material. In this study, a strategy was developed that employed severe plastic deformation to design a strong and ductile 3 vol% MXene/Ag matrix composite. Multilayer MXene was randomly incorporated into an Ag matrix via a heteroagglomeration process and spark plasma sintering. After hot extrusion, the MXene became preferentially oriented along a single direction owing to the metallic plastic flow. Moreover, the high shear stress exerted by the Ag matrix facilitated the exfoliation of the accordion-like MXene, resulting in a reduced thickness. Consequently, the tensile strength and elongation of the hot-extruded MXene/Ag composite improved by 59 % and 676 %, respectively, primarily due to the prevention of delamination between adjacent accordion flakes and the enhanced strengthening contribution of MXene. This study demonstrated the fabrication of high-performance Ag-based composites by leveraging the exceptional properties of two-dimensional MXene and the intrinsic features of the consolidation process.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116612"},"PeriodicalIF":5.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wide-temperature superelasticity in a dual-phase Nb-doped TiNiCuHf high entropy strain glass alloy

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-20 DOI: 10.1016/j.scriptamat.2025.116609

Yan Zhang, Pengfei Dang, Yumei Zhou, Xiangdong Ding, Jun Sun, Dezhen Xue

{"title":"Wide-temperature superelasticity in a dual-phase Nb-doped TiNiCuHf high entropy strain glass alloy","authors":"Yan Zhang, Pengfei Dang, Yumei Zhou, Xiangdong Ding, Jun Sun, Dezhen Xue","doi":"10.1016/j.scriptamat.2025.116609","DOIUrl":"10.1016/j.scriptamat.2025.116609","url":null,"abstract":"<div><div>We report on a Nb-doped dual-phase high entropy strain glass alloy, Ti<sub>(40-x/2)</sub>Ni<sub>(40-x/2)</sub>Cu<sub>10</sub>Hf<sub>10</sub>Nb<sub>x</sub>, specifically designed to demonstrate superelasticity in a wide-temperature range. The precipitation of Nb-rich β-Nb phase result in the increase of Ni-site/Ti-site atomic ratio in the matrix, which gives rise to the decrease of martensitic transformation with increasing Nb content (<em>x</em>). When <em>x</em> exceeds 12.5 %, the martensitic transformation is completely suppressed and it undergoes a strain glass transition. The enhanced austenite stability of strain glass alloy effectively decreases the lower temperature limit of superelasticity. Furthermore, the severe lattice distortion mechanically strengthened the above high entropy strain glass alloy, which increases the higher temperature limit of superelasticity. Thus, the Ti<sub>32.5</sub>Ni<sub>32.5</sub>Cu<sub>10</sub>Hf<sub>10</sub>Nb<sub>15</sub> strain glass alloy exhibits superelasticity across a wide temperature range from -125 °C to 50 °C with recoverable strain of 4 %. The designed TiNiCuHfNb high entropy strain glass alloys are promising for outer-space explorations with large temperature variations.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116609"},"PeriodicalIF":5.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454912","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

Role of nanoscale ordering transformation in the design of a strong quadruplex lightweight steel

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-19 DOI: 10.1016/j.scriptamat.2025.116600

Yi-Hsuan Sun , Po-Han Chiu , Chuan Tsai , Jui-Fan Tu , Hung-Wei Yen

{"title":"Role of nanoscale ordering transformation in the design of a strong quadruplex lightweight steel","authors":"Yi-Hsuan Sun , Po-Han Chiu , Chuan Tsai , Jui-Fan Tu , Hung-Wei Yen","doi":"10.1016/j.scriptamat.2025.116600","DOIUrl":"10.1016/j.scriptamat.2025.116600","url":null,"abstract":"<div><div>This study examines the impacts of ordered nanostructures on mechanical properties in a newly designed quadruplex lightweight steel. Aging the D0<sub>3</sub>-strengthened duplex lightweight steel drives two ordering reactions: the precipitation of κ-carbides in austenite and the formation of D0<sub>3</sub>/B2 intermetallic domains. The steel exhibits excellent mechanical properties, with a yield strength of 1.5 GPa, a tensile strength of 1.7 GPa, and a total elongation of 15 %. Austenite strengthening from κ-carbides and D0<sub>3</sub> softening from B2 intermetallic compounds reduce deformation incompatibility. Moreover, deformation twins are suppressed by κ-carbides. A moderate strain hardening relies on microband-induced plasticity during uniform deformation. In contrast, the very high flow stress overcomes the restriction by κ-carbides and triggers deformation twins during post-necking deformation, improving the post-elongation. This study discloses transformation paths toward the design of strong and ductile lightweight steels, especially with improved post-elongation.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116600"},"PeriodicalIF":5.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436836","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

Giant elastocaloric temperature change and its cyclic stability in [001]-oriented Cu71Al17.5Mn11.5 single crystal

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-18 DOI: 10.1016/j.scriptamat.2025.116603

Zeming Fan , Xiang Li , Pengna Zhang , Qijie Zhai , Gang Wang , Qiao Li , Jian Liu

{"title":"Giant elastocaloric temperature change and its cyclic stability in [001]-oriented Cu71Al17.5Mn11.5 single crystal","authors":"Zeming Fan , Xiang Li , Pengna Zhang , Qijie Zhai , Gang Wang , Qiao Li , Jian Liu","doi":"10.1016/j.scriptamat.2025.116603","DOIUrl":"10.1016/j.scriptamat.2025.116603","url":null,"abstract":"<div><div>Environmentally friendly and energy-efficient elastocaloric cooling is a promising alternative to conventional vapor-compression technology. In this work, we observed a large superelastic strain of 9.4 % and a giant adiabatic temperature change (Δ<em>T</em><sub>ad</sub>) of 19.5 K in [001]-oriented Cu<sub>71</sub>Al<sub>17.5</sub>Mn<sub>11.5</sub> single crystals. The present Δ<em>T</em><sub>ad</sub> breaks the record in Cu-based elastocaloric alloys. As revealed using in-situ digital imaging correlation (DIC) technique, the uniaxial stress along the [001] direction promoted two martensitic correspondent variant pairs, leading to the non-uniform strain distribution and pronounced stress hysteresis. Upon 10<sup>4</sup> cycles, the Δ<em>T</em><sub>ad</sub> degraded from 19.5 to 2.1 K, with a cyclic degradation rate of 1.7 × 10<sup>−3</sup> K per cycle. Our study provides valuable insights into the selection of crystallographic orientation and fatigue resistance strategy for Cu-based elastocaloric alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116603"},"PeriodicalIF":5.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429039","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

Mediating coherent L12 phase precipitation via two-step aging in Si-modified A-286 alloy

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-17 DOI: 10.1016/j.scriptamat.2025.116611

Yuanfei Su , Shuzhan Zhang , Shengxuan Jiao , Xianbo Shi , Wei Yan , Shenghu Chen , Lijian Rong

引用次数: 0

A new perspective on the mechanical behavior of Inconel 617 at elevated temperatures for small modular reactors

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-17 DOI: 10.1016/j.scriptamat.2025.116605

Benhour Amirian, Asad Asad, Logan Krezan, Mostafa Yakout, James David Hogan

{"title":"A new perspective on the mechanical behavior of Inconel 617 at elevated temperatures for small modular reactors","authors":"Benhour Amirian, Asad Asad, Logan Krezan, Mostafa Yakout, James David Hogan","doi":"10.1016/j.scriptamat.2025.116605","DOIUrl":"10.1016/j.scriptamat.2025.116605","url":null,"abstract":"<div><div>This study investigates the temperature-dependent mechanical properties of Inconel 617, a nickel-based superalloy, for small modular reactor applications. The formation of the sigma phase, driven by high chromium content during prolonged high-temperature exposure, significantly impacts the alloy's strength, creep resistance, stress rupture life, and ductility. The transition temperature for sigma phase formation is predicted to be approximately <span><math><mn>1064</mn><mspace></mspace><mmultiscripts><mrow><mtext>C</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mo>∘</mo></mrow></mmultiscripts></math></span>, with an uncertainty range between <span><math><mn>700</mn><mspace></mspace><mmultiscripts><mrow><mtext>C</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mo>∘</mo></mrow></mmultiscripts></math></span> and <span><math><mn>1250</mn><mspace></mspace><mmultiscripts><mrow><mtext>C</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mo>∘</mo></mrow></mmultiscripts></math></span>, confirmed through an uncertainty analysis of elemental composition. Chromium is identified as the primary element influencing sigma phase stability. Additionally, hot tearing susceptibility during solidification is assessed, revealing that a carbon content of 0.08 <em>wt</em>% minimizes the cracking susceptibility coefficient to 0.425, reducing the risk of solidification cracking. These findings offer critical insights for optimizing the composition and processing conditions of Inconel 617 in laser-directed energy deposition additive manufacturing.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116605"},"PeriodicalIF":5.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Delafossite-type CuGaO2 particulate photocathode synthesized via molten salt method for efficient and stable solar water splitting

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-16 DOI: 10.1016/j.scriptamat.2025.116602

H. Zhang , Y. Wang , Q.T. Liu , J. Gao , J.M. Li , Q.L. Liu , Z.-Y. Zhao , Y.B. Kuang

{"title":"Delafossite-type CuGaO2 particulate photocathode synthesized via molten salt method for efficient and stable solar water splitting","authors":"H. Zhang , Y. Wang , Q.T. Liu , J. Gao , J.M. Li , Q.L. Liu , Z.-Y. Zhao , Y.B. Kuang","doi":"10.1016/j.scriptamat.2025.116602","DOIUrl":"10.1016/j.scriptamat.2025.116602","url":null,"abstract":"<div><div>With the growing demand for renewable energy, photoelectrochemical (PEC) water splitting has emerged as a promising method for hydrogen production. CuGaO<sub>2</sub> is a highly attractive photocathode material due to its positive onset potential, high photovoltage, and ability to absorb visible light via valence band engineering. However, most CuGaO<sub>2</sub> materials suffer from poor crystallinity and oxygen vacancies, which hinder PEC performance. In this study, we synthesized micron-sized prism-shaped CuGaO<sub>2</sub> (MP-CGO) using a novel molten salt method. The MP-CGO photocathode achieved a photocurrent density of 1.2 mA cm<sup>−2</sup> with stability over 6 h, surpassing the performance of materials prepared by hydrothermal methods. This improvement is attributed to enhanced crystallinity and the elimination of defects, which increase carrier concentration, accelerate charge transport, and improve onset potential. Furthermore, MP-CGO, when loaded with Pt cocatalysts, efficiently facilitated hydrogen production. These findings lay a strong foundation for the development of CuGaO<sub>2</sub>-based and ternary oxide photocathodes.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116602"},"PeriodicalIF":5.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422346","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

In situ transmission Kikuchi diffraction tensile testing

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.scriptamat.2025.116608

Tijmen Vermeij , Amit Sharma , Douglas Steinbach , Jun Lou , Johann Michler , Xavier Maeder

{"title":"In situ transmission Kikuchi diffraction tensile testing","authors":"Tijmen Vermeij , Amit Sharma , Douglas Steinbach , Jun Lou , Johann Michler , Xavier Maeder","doi":"10.1016/j.scriptamat.2025.116608","DOIUrl":"10.1016/j.scriptamat.2025.116608","url":null,"abstract":"<div><div>We present a methodology for <em>in situ</em> Transmission Kikuchi Diffraction (TKD) tensile testing that enables nanoscale characterization of the evolution of complex plasticity mechanisms. By integrating a modified <em>in situ</em> scanning electron microscope nanoindenter with a microscale push-to-pull device and a conventional Electron Backscatter Diffraction (EBSD) detector, we achieved TKD measurements at high spatial resolution during mechanical deformation. A dedicated focused ion beam procedure was developed for site-specific specimen fabrication, including lift-out, thinning, and shaping into a dog-bone geometry. The methodology was demonstrated on two case studies: (i) a metastable β-Ti single crystal, on which we quantified the initiation and evolution of nanoscale twinning and stress-induced martensitic transformation, and (ii) a CuAl/Al₂O₃ nanolaminate, which showed nanoscale plasticity and twinning/detwinning in a complex microstructure. Overall, this approach provides a robust alternative to <em>in situ</em> EBSD and transmission electron microscopy testing, facilitating detailed analysis of deformation mechanisms at the nanoscale.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116608"},"PeriodicalIF":5.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manipulating the fine grain nucleation in Sc/Zr-modified Al alloys through a novel process strategy of laser powder bed fusion

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-15 DOI: 10.1016/j.scriptamat.2025.116606

Zhenyu Chen , Chengqi Lu , Yuang Cheng , Xing Zhu , Tongzheng Wei , Chuanyang Wang , Qingbo Jia

{"title":"Manipulating the fine grain nucleation in Sc/Zr-modified Al alloys through a novel process strategy of laser powder bed fusion","authors":"Zhenyu Chen , Chengqi Lu , Yuang Cheng , Xing Zhu , Tongzheng Wei , Chuanyang Wang , Qingbo Jia","doi":"10.1016/j.scriptamat.2025.116606","DOIUrl":"10.1016/j.scriptamat.2025.116606","url":null,"abstract":"<div><div>Fine equiaxed grain structure demonstrated promising opportunities for reducing the solidification cracking and mechanical property anisotropy issues of Sc/Zr-modified Al alloys fabricated by laser powder bed fusion (LPBF), provided by sufficient Al<sub>3</sub>(Sc,Zr) primary particles existed in the melt pool. Herein, we report a novel LPBF processing strategy to manipulate the fine equiaxed grain nucleation in Al alloys with a reduced addition of Sc/Zr elements. By periodically alternating the input laser process parameters between layers, we found that the nucleation of Al<sub>3</sub>(Sc,Zr) primary particles can be significantly promoted along the melt pool boundaries. The proposed process strategy was further verified in a hot tearing susceptible Al-Cu-Sc alloy, which successfully improved its LPBF processability and mechanical property isotropy. The present study provides valuable insights for future microstructure and mechanical property optimizations of high strength alloys fabricated via LPBF.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"261 ","pages":"Article 116606"},"PeriodicalIF":5.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422344","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

Reactive flash sintering: Assessing the role of volume change during phase reaction

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-02-14 DOI: 10.1016/j.scriptamat.2025.116601

Vikaskumar Mishra, Praful Pandey, Pranav Rai, Tamoghna Chakrabarti, Devinder Yadav

{"title":"Reactive flash sintering: Assessing the role of volume change during phase reaction","authors":"Vikaskumar Mishra, Praful Pandey, Pranav Rai, Tamoghna Chakrabarti, Devinder Yadav","doi":"10.1016/j.scriptamat.2025.116601","DOIUrl":"10.1016/j.scriptamat.2025.116601","url":null,"abstract":"<div><div>Reactive flash sintering (RFS) has recently emerged as a novel technique for simultaneous synthesis and densification of ceramics where phase reaction and sintering occur in a few seconds. Typically, any phase reaction is accompanied by a volume change. This work is an initial attempt to understand the influence of phase-reaction-driven volume change on densification during RFS. We carried out RFS on two systems; one showing large volume contraction (<span><math><mrow><mi>B</mi><mi>a</mi><mi>O</mi><mo>+</mo><mi>T</mi><mi>i</mi><msub><mi>O</mi><mn>2</mn></msub><mo>→</mo><mi>B</mi><mi>a</mi><mi>T</mi><mi>i</mi><msub><mi>O</mi><mn>3</mn></msub></mrow></math></span>) and other showing large volume expansion (<span><math><mrow><mi>A</mi><msub><mi>l</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub><mo>+</mo><mi>T</mi><mi>i</mi><msub><mi>O</mi><mn>2</mn></msub><mo>→</mo><mi>A</mi><msub><mi>l</mi><mn>2</mn></msub><mi>T</mi><mi>i</mi><msub><mi>O</mi><mn>5</mn></msub></mrow></math></span>), during phase reaction. The progress of phase reaction and corresponding densification was quantitatively monitored through XRD, real-time video and density measurement of interrupted experiments. In the volume expansion system, the phase reaction contributed positively to densification. In the volume contraction system, phase reaction de-sintered the sample by generating additional pores. We show that volume change associated with phase reaction significantly influences the extent of sintering during the RFS process.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"260 ","pages":"Article 116601"},"PeriodicalIF":5.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403027","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