Scripta Materialia最新文献_第2页

Atomic-scale insights into the modification mechanism of trace Bi on eutectic Mg2Si in an Al-6Mg-2Si-0.2Mn alloy Al-6Mg-2Si-0.2Mn合金中微量Bi对Mg2Si共晶改性机理的原子尺度研究

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-30 DOI: 10.1016/j.scriptamat.2025.117020

Tao Gu , Hai-Long Jia , Min Zha , Pin-Kui Ma , Jia-Wang Song , Yong-Fu Zhu , Hui-Yuan Wang

引用次数: 0

Molecular dynamics simulation of heterogeneous nucleation of bcc-phase at fcc-grain-boundary dislocations fcc-晶界位错中bcc相非均相形核的分子动力学模拟

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-30 DOI: 10.1016/j.scriptamat.2025.117019

Xiaoqin Ou , Jilt Sietsma , Maria J. Santofimia

引用次数: 0

Order control engineering for balanced mechanical-magnetic properties in amorphous soft magnets 非晶软磁体平衡机械-磁性能的顺序控制工程

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-29 DOI: 10.1016/j.scriptamat.2025.117017

Xiao Liu , Rong-Ce Sun , Si-Yi Di , Xue-Song Li , Jing Zhou , Qiang Li , Bao-an Sun , Hai-bo Ke , Wei-hua Wang , Haiyang Bai

{"title":"Order control engineering for balanced mechanical-magnetic properties in amorphous soft magnets","authors":"Xiao Liu , Rong-Ce Sun , Si-Yi Di , Xue-Song Li , Jing Zhou , Qiang Li , Bao-an Sun , Hai-bo Ke , Wei-hua Wang , Haiyang Bai","doi":"10.1016/j.scriptamat.2025.117017","DOIUrl":"10.1016/j.scriptamat.2025.117017","url":null,"abstract":"<div><div>Amorphous soft magnetic materials play pivotal roles in energy conversion, transmission, and storage for electronic devices. Emerging applications under high mechanical loads demand simultaneous optimization of mechanical properties. However, an inherent trade-off exists between achieving excellent soft magnetic performance and mechanical properties. Inspired by ultrafine dual-phase structural design, we propose a strategy utilizing composition fluctuations to construct Fe-rich and Fe-poor phases to construct tunable ultrafine dual-phase amorphous structures. By precise control of Fe-rich cluster structure ratio and inter-cluster spacing, we obtained an amorphous soft magnet with exceptional soft magnetic properties <span><math><mrow><mo>(</mo><msub><mi>B</mi><mi>s</mi></msub><mo>:</mo><mspace></mspace><mn>1.8</mn><mspace></mspace><mi>T</mi><mo>,</mo><mspace></mspace><msub><mi>H</mi><mi>c</mi></msub><mo>:</mo><mspace></mspace><mn>0.85</mn><mspace></mspace><mi>O</mi><mi>e</mi><mo>)</mo></mrow></math></span> alongside outstanding mechanical performance with negligible size effects, including a yield strength of 4.08 GPa <span><math><mrow><mo>(</mo><mi>σ</mi><mo>/</mo><mi>E</mi><mspace></mspace><mo>≈</mo><mspace></mspace><mn>0.03</mn><mo>)</mo></mrow></math></span> and 50% homogeneous plastic deformation. This design paradigm, enabling concurrent ultrahigh strength, plasticity, and soft magnetism, opens avenues for demanding applications such as high-load micro-electromechanical systems systems and thin-film inductor materials.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117017"},"PeriodicalIF":5.6,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217214","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

Multivalency in Zr6Nb2O17 Zr6Nb2O17中的多价态

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-29 DOI: 10.1016/j.scriptamat.2025.117014

R. Jackson Spurling , Jacob T. Sivak , Susan B. Sinnott , Jon-Paul Maria

引用次数: 0

Interaction of irradiation defect and solute H atoms in Zircaloy-4: An in-situ TEM observation under heavy ion irradiation 锆-4中辐照缺陷与溶质H原子的相互作用：重离子辐照下的原位透射电镜观察

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-26 DOI: 10.1016/j.scriptamat.2025.117012

Huilong Yang , Yang Liu , Mingxu Gao , Dongyue Chen , Sho Kano , Kenta Murakami , Zhengcao Li , Hiroaki Abe

{"title":"Interaction of irradiation defect and solute H atoms in Zircaloy-4: An in-situ TEM observation under heavy ion irradiation","authors":"Huilong Yang , Yang Liu , Mingxu Gao , Dongyue Chen , Sho Kano , Kenta Murakami , Zhengcao Li , Hiroaki Abe","doi":"10.1016/j.scriptamat.2025.117012","DOIUrl":"10.1016/j.scriptamat.2025.117012","url":null,"abstract":"<div><div>In-situ TEM observation under heavy ion irradiation was conducted with H-free and H-charged Zr-based alloy, to reveal the synergistic effects of irradiation and hydrogenation in nuclear fuel cladding materials. Experimental results showed two aspects regarding the interaction of irradiation defects and solute H atoms in Zr-based alloy. On the one hand, the density of irradiation defects in H-charged specimen is greater relative to H-free specimen. The nucleation of irradiation loops promoted by the solute H atoms is probably due to the formation of energetically stable vacancy- hydrogen complex. On the other hand, irradiation defects play an important role in the hydride re-precipitation during cooling. Re-precipitation of hydride was observed in the H-charged specimen without irradiation, which is however absent in the irradiated specimen. This is because acting as the new sites for H atoms, irradiation defects increase solid solubility of H in Zr and therefore suppress of hydride re-precipitation upon cooling.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117012"},"PeriodicalIF":5.6,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155265","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

Erratic grain rotation during annealing of a Mg alloy interpreted via shear-coupling 通过剪切耦合解释镁合金退火过程中的不规则晶粒旋转

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-26 DOI: 10.1016/j.scriptamat.2025.117005

Matthew R. Barnett , Jun Wang , Yu Chen , Ross K.W. Marceau , Runguang Li , Peter Lynch , Scott Barnett , Andrew Stevenson

引用次数: 0

Simultaneously enhancing the strength and ductility of W through heterostructured grains driven by controllable oxide distributions 同时，通过控制氧化物分布驱动的异质结构晶粒，提高钨的强度和延展性

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-25 DOI: 10.1016/j.scriptamat.2025.117008

Zhi Dong , Feiyu Liu , Lu Yang , Di Dong , Zongqing Ma , Yongchang Liu

{"title":"Simultaneously enhancing the strength and ductility of W through heterostructured grains driven by controllable oxide distributions","authors":"Zhi Dong , Feiyu Liu , Lu Yang , Di Dong , Zongqing Ma , Yongchang Liu","doi":"10.1016/j.scriptamat.2025.117008","DOIUrl":"10.1016/j.scriptamat.2025.117008","url":null,"abstract":"<div><div>All long, performance optimization in oxide dispersion-strengthened W alloys has predominantly focused on monolithic oxide regulation, neglecting multi-oxide synergy and grain structure design. This paper breaks away from the traditional homogeneous dispersion strengthening paradigm and constructs heterogeneous grain structure through spatially selective distribution of different oxides, thereby resolving the strength-ductility trade-offs. First, guided by thermodynamic calculations, we systematically evaluate the steady-state characteristics of various oxides in W and then identify oxides suitable for intragranular strengthening (HfO<sub>2</sub>) and grain boundary stabilization (La<sub>2</sub>O<sub>3</sub>). Subsequently, through a composite powder blending strategy, we construct a heterogeneous grain structure in W, where a portion of W grains are strengthened by uniformly dispersed HfO<sub>2</sub> nanoparticles, while the remaining remain relatively soft and dispersoid-free. Compared to conventional W-La<sub>2</sub>O<sub>3</sub> alloy, the W-La<sub>2</sub>O<sub>3</sub>-HfO<sub>2</sub> alloy we developed yields a 33% increase in strength and 57% increase in ductility at 200°C, providing a new direction for fabricating high-performance refractory metals.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117008"},"PeriodicalIF":5.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155262","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

Dislocation evolution and redistribution during stress relaxation in single crystal AD730TM after prior plastic strain at 700 °C 700℃预塑性应变后AD730TM单晶应力松弛过程中位错演化与重分布

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-25 DOI: 10.1016/j.scriptamat.2025.117009

Fabio Machado Alves da Fonseca , Patrick Villechaise , Malik Durand , Arnaud Longuet , Florent Coudon , Loïc Signor , Julien De Jaeger , Dominique Eyidi , Nathalie Bozzolo , Jonathan Cormier

{"title":"Dislocation evolution and redistribution during stress relaxation in single crystal AD730TM after prior plastic strain at 700 °C","authors":"Fabio Machado Alves da Fonseca , Patrick Villechaise , Malik Durand , Arnaud Longuet , Florent Coudon , Loïc Signor , Julien De Jaeger , Dominique Eyidi , Nathalie Bozzolo , Jonathan Cormier","doi":"10.1016/j.scriptamat.2025.117009","DOIUrl":"10.1016/j.scriptamat.2025.117009","url":null,"abstract":"<div><div>Understanding dislocation evolution during viscoplastic deformation is essential to accurately predict high-temperature superalloy behavior. While creep and monotonic deformation are well studied, the evolution of the dislocation substructures during stress relaxation, particularly following prior plastic straining, remains unclear. This study investigates a single crystal γ/γ' AD730<sup>TM</sup> superalloy deformed at 700 °C, focusing on dislocation evolution and redistribution. Transmission electron microscopy reveals that stacking faults formed during plastic straining progressively disappear during relaxation, suggesting thermally activated mechanisms such as dislocation re-association and recovery. After re-association, perfect dislocations spread into the matrix, forming a homogeneous dislocation network. These microstructural evolutions are believed to underlie the macroscopic stress relaxation behavior, which exhibits two regimes in the Norton diagram: an initial high-stress exponent regime linked to rapid dislocation rearrangement, followed by a low-stress exponent regime associated with broader dislocation activity.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117009"},"PeriodicalIF":5.6,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155266","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

Strengthening grain boundaries in high-entropy intermetallics through the incorporation of metalloid and nonmetal interstitials 在高熵金属间化合物中，通过加入类金属和非金属间隙强化晶界

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-24 DOI: 10.1016/j.scriptamat.2025.117003

Jun Zhang , Yaoxu Xiong , Biao Xu , Shihua Ma , Shasha Huang , Xuepeng Xiang , Haijun Fu , Jijung Kai , Shijun Zhao

{"title":"Strengthening grain boundaries in high-entropy intermetallics through the incorporation of metalloid and nonmetal interstitials","authors":"Jun Zhang , Yaoxu Xiong , Biao Xu , Shihua Ma , Shasha Huang , Xuepeng Xiang , Haijun Fu , Jijung Kai , Shijun Zhao","doi":"10.1016/j.scriptamat.2025.117003","DOIUrl":"10.1016/j.scriptamat.2025.117003","url":null,"abstract":"<div><div>Ordered intermetallics are critical for achieving ultra-high strength in high-temperature alloys but often suffer from limited ductility. While metalloid doping has been extensively recognized in conventional intermetallics, its applicability to recently developed high-entropy intermetallics (HEIs) remains unclear. In this study, we investigate the influence of interstitial elements on grain boundary (GB) strengthening in HEIs, focusing on a model L1<sub>2</sub>-structure (NiCoFeAlTi) system. Through systematic density functional theory and Monte-Carlo (DFT-MC) simulations, we evaluate the segregation, formation, and strengthening energies of B, C, N, and O interstitials at GBs. Our results indicate that elements with strong covalent bonding preferentially segregate to GB regions, enhancing cohesion energies. The strengthening efficacy is governed by the interplay between local structural ordering, volume expansion, and the inherently complex energy landscape of HEIs. These findings clarify the atomic-scale mechanisms underpinning interstitial strengthening and establish design principles for optimizing HEI compositions.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117003"},"PeriodicalIF":5.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155263","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

Impact of focused ion beam-induced damage on micromechanical properties in Hematite 聚焦离子束损伤对赤铁矿微力学性能的影响

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2025-09-23 DOI: 10.1016/j.scriptamat.2025.117000

Shreehard Sahu, Vivek Devulapalli, Saba Saood, Gerhard Dehm, James P. Best

{"title":"Impact of focused ion beam-induced damage on micromechanical properties in Hematite","authors":"Shreehard Sahu, Vivek Devulapalli, Saba Saood, Gerhard Dehm, James P. Best","doi":"10.1016/j.scriptamat.2025.117000","DOIUrl":"10.1016/j.scriptamat.2025.117000","url":null,"abstract":"<div><div>Focused ion beam (FIB) milling is a common technique for microscale fabrication, however, this method is also known to alter the surface defect properties, affecting mechanical deformation response. This study investigates the effects of Ga⁺ and Xe⁺ sources on the mechanical response of ‘near dislocation free’ Hematite α-Fe₂O₃ single crystals using micropillar compression with samples oriented along [0001], [<span><math><mrow><mn>0</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>10</mn></mrow></math></span>], and [<span><math><mrow><mn>5</mn><mover><mn>5</mn><mo>¯</mo></mover><mn>02</mn></mrow></math></span>] compression axes. Although the extent of difference in mechanical properties between Ga<sup>+</sup> and Xe<sup>+</sup>FIB varied across crystallographic compression directions, the critical resolved shear stress (CRSS) measured in Xe<sup>+</sup> FIB was consistently higher. This marked difference in CRSS was attributed to microstructural differences and higher interaction volume in Ga<sup>+</sup> compared to Xe<sup>+</sup> FIB. The anisotropic response of the ion beam damage on CRSS has also been reported.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"271 ","pages":"Article 117000"},"PeriodicalIF":5.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119225","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