Scripta Materialia最新文献_第4页

Irradiation-Induced Grain Growth of γFe2O3 and Fe3O4at Cryogenic Temperatures 低温辐照诱导γ - fe2o3和fe3o4晶粒生长

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.scriptamat.2026.117179

Dmitrii Kretov , Tiffany Kaspar , Ben Derby , Daniel Schreiber , Djamel Kaoumi

{"title":"Irradiation-Induced Grain Growth of γFe2O3 and Fe3O4at Cryogenic Temperatures","authors":"Dmitrii Kretov , Tiffany Kaspar , Ben Derby , Daniel Schreiber , Djamel Kaoumi","doi":"10.1016/j.scriptamat.2026.117179","DOIUrl":"10.1016/j.scriptamat.2026.117179","url":null,"abstract":"<div><div>This work reports the first observations of grain growth under irradiation of Fe oxides, specifically maghemite (γ-Fe<sub>2</sub>O<sub>3</sub>) and magnetite (Fe<sub>3</sub>O<sub>4</sub>). The Fe oxide thin films were grown by Pulsed Laser Deposition and irradiated <em>in-situ</em> in a Transmission Electron Microscope at <span><math><mrow><mo>−</mo><mspace></mspace></mrow></math></span>223<span><math><mrow><msup><mrow></mrow><mo>∘</mo></msup><mi>C</mi><mspace></mspace></mrow></math></span>using 1 MeV Kr<sup>2+</sup> ions up to 8.75 x<span><math><mrow><mspace></mspace><msup><mrow><mn>10</mn></mrow><mn>19</mn></msup><mrow><mspace></mspace><mtext>ions</mtext></mrow><mo>/</mo><msup><mrow><mi>m</mi></mrow><mn>2</mn></msup></mrow></math></span> to study grain growth kinetics under irradiation. Grain growth at such low temperatures appears to follow kinetics that can be accounted for by the thermal spike model developed for metals in the literature. The corresponding activation energies were calculated and compared with other oxides. The results demonstrate that γ-Fe<sub>2</sub>O<sub>3</sub>, despite its larger initial grain size, exhibits surprisingly fast grain growth in comparison with Fe<sub>3</sub>O<sub>4</sub>, likely due to the presence of iron vacancies in the crystal structure that facilitate faster atomic diffusion under irradiation.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117179"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035215","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

Process-induced micromechanics variations in additively manufactured 316 stainless steel characterised by quasi-in-situ EBSD 用准原位EBSD表征增材制造316不锈钢的工艺诱导微观力学变化

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-03 DOI: 10.1016/j.scriptamat.2025.117159

Yangchao Deng , Lu Yang , Fan Wu , Jianfeng Wen , Wajira Mirihanage , Kun Yan , Wenyou Zhang , Rocco Lupoi

{"title":"Process-induced micromechanics variations in additively manufactured 316 stainless steel characterised by quasi-in-situ EBSD","authors":"Yangchao Deng , Lu Yang , Fan Wu , Jianfeng Wen , Wajira Mirihanage , Kun Yan , Wenyou Zhang , Rocco Lupoi","doi":"10.1016/j.scriptamat.2025.117159","DOIUrl":"10.1016/j.scriptamat.2025.117159","url":null,"abstract":"<div><div>The strength-ductility trade-off remains a critical challenge in additively manufactured stainless steels due to their process-induced microstructures. In this study, type 316 stainless steel (SS316) was fabricated via a novel metal additive manufacturing technique employing powder sheets (MAPS), demonstrating exceptional strength with considerable ductility. To elucidate the mechanisms underlying this performance, quasi-in-situ electron backscatter diffraction (EBSD) was employed to monitor the microstructural evolution and deformation behaviour of SS316 produced by MAPS in comparison with laser powder bed fusion (LPBF). LPBF exhibits extensive deformation twinning that facilitates broad strain accommodation with sustained hardening, whereas MAPS shows dense dislocation storage within cellular substructures, leading to pronounced strain hardening and superior strength. The limited twinning activation in MAPS constrains strain redistribution, localising plasticity along cellular subgrain boundaries. The interplay between dislocation-dominated hardening and twinning-limited plasticity provides MAPS-processed SS316 with enhanced mechanical performance and highlights the importance of processing strategy in tailoring deformation pathways.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117159"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883758","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

Combining grain boundary diffusion and segmentation: A novel production route for resource-efficient Nd–Fe–B magnets 结合晶界扩散和分割：一种新型高效钕铁硼磁体生产路线

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-10 DOI: 10.1016/j.scriptamat.2025.117164

Abdullatif Durgun , Imants Dirba , Konrad Opelt , Chi-Chia Lin , Jürgen Gassmann , Oliver Gutfleisch

{"title":"Combining grain boundary diffusion and segmentation: A novel production route for resource-efficient Nd–Fe–B magnets","authors":"Abdullatif Durgun , Imants Dirba , Konrad Opelt , Chi-Chia Lin , Jürgen Gassmann , Oliver Gutfleisch","doi":"10.1016/j.scriptamat.2025.117164","DOIUrl":"10.1016/j.scriptamat.2025.117164","url":null,"abstract":"<div><div>To enhance coercivity in high-performance Nd-Fe-B magnets, resource critical heavy rare earth elements Dy and Tb are used in the grain boundary diffusion process (GBDP). However, GBDP is limited to thin magnets, typically around 4 mm which restricts their applications. Here, we report a novel processing route by combining the GBDP process with a magnet stacking architecture using <em>a</em> < 10 μm thin low-melting multi-element Tb₁₀Pr₆₀Al₁₀Cu₁₀Ga₁₀ alloy which has now a dual function: it acts as a binder between the magnet segments and is at the same time an efficient source for core-shell formation on the individual crystallite level. This not only enables production of magnets with any thickness without losing performance, but also paves the way for resource efficiency using cheap and abundant light rare earth Cerium in hybrid magnets by strategically stacking different grades with tailored chemical compositions resulting in a unique macroscopic magnetic hardening.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117164"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940464","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

JeZCA and JeZiCA – Powerful predictors of glass-forming ability JeZCA和JeZiCA -玻璃形成能力的强大预测因子

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.scriptamat.2026.117167

Rafael B. Rosante, Ricardo F. Lancelotti, Edgar D. Zanotto

{"title":"JeZCA and JeZiCA – Powerful predictors of glass-forming ability","authors":"Rafael B. Rosante, Ricardo F. Lancelotti, Edgar D. Zanotto","doi":"10.1016/j.scriptamat.2026.117167","DOIUrl":"10.1016/j.scriptamat.2026.117167","url":null,"abstract":"<div><div>Glass-forming ability (GFA) is a key parameter that determines how easily a liquid can vitrify, with significant scientific and technological implications. Its accurate evaluation is challenging due to the complexity of experimental measurements and theoretical calculations. A simplified predictor, the JeZiCA model, was previously proposed as <span><math><mrow><mi>η</mi><mrow><mo>(</mo><msub><mi>T</mi><mi>L</mi></msub><mo>)</mo></mrow><mo>/</mo><msup><mrow><msub><mi>T</mi><mi>L</mi></msub></mrow><mn>2</mn></msup></mrow></math></span>, where <span><math><msub><mi>T</mi><mi>L</mi></msub></math></span> is the liquidus temperature and <span><math><mrow><mi>η</mi><mo>(</mo><msub><mi>T</mi><mi>L</mi></msub><mo>)</mo></mrow></math></span> is the viscosity at that temperature. In this study, we extend this approach by introducing two refined formulations, JeZCAT and JeZCAH, which additionally consider model parameters, including the temperature of maximum crystal growth rate (<span><math><mrow><msub><mi>T</mi><mi>n</mi></msub><mrow><mo>)</mo></mrow></mrow></math></span>, the corresponding viscosity <span><math><mrow><mi>η</mi><mo>(</mo><msub><mi>T</mi><mi>n</mi></msub><mo>)</mo></mrow></math></span>, the atomic jump distance (λ), and the free energy change of crystallization (∆G), estimated using the Turnbull and Hoffman methods. Testing these refined formulations on 20 stoichiometric oxide compositions reveals a slightly improved performance (<span><math><msup><mi>R</mi><mn>2</mn></msup></math></span> from 0.87 to 0.90). However, the original JeZiCA model remains a simple and effective predictor, since machine learning models can estimate <span><math><msub><mi>T</mi><mi>L</mi></msub></math></span> and <span><math><mrow><mi>η</mi><mo>(</mo><msub><mi>T</mi><mi>L</mi></msub><mo>)</mo></mrow></math></span> from composition, avoiding glass production.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117167"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973925","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 investigation of {332} twin boundary migration in metastable bcc titanium alloys 亚稳bcc钛合金{332}孪晶界迁移的原位研究

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI: 10.1016/j.scriptamat.2026.117189

Yuhe Huang , Haibo Feng , Jun Lu , Junheng Gao , Haitao Zhao , Chaolei Zhang , Honghui Wu , Shuize Wang , Xinping Mao

{"title":"In-situ investigation of {332} twin boundary migration in metastable bcc titanium alloys","authors":"Yuhe Huang , Haibo Feng , Jun Lu , Junheng Gao , Haitao Zhao , Chaolei Zhang , Honghui Wu , Shuize Wang , Xinping Mao","doi":"10.1016/j.scriptamat.2026.117189","DOIUrl":"10.1016/j.scriptamat.2026.117189","url":null,"abstract":"<div><div>The {332} body-centered cubic (bcc) deformation twinning mode is crucial for the mechanical performance of metastable bcc Ti alloys, yet its migration and growth mechanism remains unclear. Here, in situ tensile transmission electron microscopy was employed to directly observe {332} twin boundary migration in a Ti–12Mo alloy. Transient α’’ martensite was found at migrating twin boundaries. Lattice correspondence and Schmid factor analyses show that the activated α’’ martensite occurs as single crystallographic variant in the {332} twin and the bcc matrix, indicating that the migration of the {332} twin boundary is not governed by α’’ twinning-assisted mechanisms. Instead, α’’ acts as an interfacial accommodation structure facilitating twin boundary migration. These findings provide direct mechanistic insight into the role of α’’ martensite during {332} twin boundary migration in metastable bcc Ti alloys, demonstrating that the {332} twin migration proceeds via martensite-assisted interfacial accommodation rather than through the martensitic twinning mechanism.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117189"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074174","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

Stable dislocation junctions empower superior radiation stability of dislocation arrays and subgrain boundaries 稳定的位错结赋予位错阵列和亚晶界优越的辐射稳定性

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-03 DOI: 10.1016/j.scriptamat.2025.117163

Yipeng Li , Dewang Cui , Danmin Peng , Yifan Ding , Yiwei Wang , Zhipeng Sun , Yuanming Li , Chi Chen , Xi Qiu , Guang Ran

{"title":"Stable dislocation junctions empower superior radiation stability of dislocation arrays and subgrain boundaries","authors":"Yipeng Li , Dewang Cui , Danmin Peng , Yifan Ding , Yiwei Wang , Zhipeng Sun , Yuanming Li , Chi Chen , Xi Qiu , Guang Ran","doi":"10.1016/j.scriptamat.2025.117163","DOIUrl":"10.1016/j.scriptamat.2025.117163","url":null,"abstract":"<div><div>Dislocation structures are critical for mechanical properties. While dislocations can act as sinks for point defects, their irradiation-induced instability remains a significant challenge. Using in-situ 800 keV Kr<sup>2+</sup> irradiation of Mo-14Re alloys, we systematically compared the evolution of random dislocations and ordered dislocation arrays, the latter being the fundamental building blocks of subgrain boundaries. We find that complex arrays—particularly triple arrays—form stable sessile junctions, including binary <100> junctions and ternary 1/2<111> junctions, that topologically lock the network. These cooperative multi-junction interactions strongly restrict irradiation-induced dislocation motion, preserving microstructural integrity up to 3.0 dpa while simultaneously sustaining a denuded zone free of dislocation loops. This work reveals that increasing topological complexity in dislocation arrays, and thus in the subgrain boundaries they comprise, markedly enhances their microstructural stability under irradiation.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117163"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883757","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

Defect engineering in nickel via electrodeposition following low temperature annealing 低温退火后电沉积镍的缺陷工程

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.scriptamat.2025.117160

M.J.K. Lodhi , Yuxin Hu , Ching-Heng Shiau , Brian S. Newell , Benjamin W. Spencer , Peter Hosemann , Fei Teng

{"title":"Defect engineering in nickel via electrodeposition following low temperature annealing","authors":"M.J.K. Lodhi , Yuxin Hu , Ching-Heng Shiau , Brian S. Newell , Benjamin W. Spencer , Peter Hosemann , Fei Teng","doi":"10.1016/j.scriptamat.2025.117160","DOIUrl":"10.1016/j.scriptamat.2025.117160","url":null,"abstract":"<div><div>Electrodeposited nickel coatings are characterized by high densities of crystalline defects including dislocations, growth twins, and hydrogen bubbles/voids, arising from the non-equilibrium nature of deposition. While these metastable features influence as-deposited properties, their evolution under low temperature annealing remains unexplored. Here we demonstrate that low temperature annealing (200 °C) induces significant microstructural rearrangement without grain growth, enabling defect engineering through thermally assisted dislocation motion and twin boundary migration. Notably, we observe faceted twin boundaries and dislocation organization into extended networks, which have been rarely reported under such annealing conditions. These transformations are attributed to hydrogen-assisted defect mobility, facilitated by the release or redistribution of hydrogen trapped during deposition. These structural transformations correlate with a significant enhancement in mechanical properties, including a twofold increase in yield strength and improved ductility. Our findings highlight the role of trapped hydrogen in mediating low-temperature defect mobility and twin boundary evolution, offering a unique pathway for microstructural tuning of metallic coatings through controlled annealing.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117160"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940434","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

Significant enhancement of stress corrosion resistance without strength degradation in Al-Zn-Mg-Cu alloys via natural aging pretreatment 自然时效处理显著提高了Al-Zn-Mg-Cu合金的抗应力腐蚀性能而不降低其强度

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-10 DOI: 10.1016/j.scriptamat.2026.117168

Lei Jiang , Xinbiao Zhang , Juan Du , Zheng Shi , Zhihao Zhang , Jianxin Xie

{"title":"Significant enhancement of stress corrosion resistance without strength degradation in Al-Zn-Mg-Cu alloys via natural aging pretreatment","authors":"Lei Jiang , Xinbiao Zhang , Juan Du , Zheng Shi , Zhihao Zhang , Jianxin Xie","doi":"10.1016/j.scriptamat.2026.117168","DOIUrl":"10.1016/j.scriptamat.2026.117168","url":null,"abstract":"<div><div>Achieving a synergistic enhancement of the inherently conflicting tensile strength and stress corrosion resistance in 7000-series aluminum alloys has long been a major challenge. In this study, we demonstrate that adopting an appropriate natural aging pretreatment after solution treatment enables the alloy, in its peak-aged condition, to develop intragranular precipitates with higher number density and more uniform size distribution, as well as grain boundary precipitates with significantly reduced size and an increased Mg/Zn ratio. These microstructural modifications result in the simultaneous improvement of both strength and stress corrosion resistance. Taking the newly designed Al-10.2Zn-2.32Mg-1.35Cu-0.1Cr-0.1Zr alloy as an example, after a 10-day natural aging pretreatment, the stress corrosion sensitivity factor of the alloy in the peak-aged condition is significantly reduced from 25.0 % ± 0.8 % to 10.7 % ± 0.9 %, while maintaining a certain enhancement in tensile strength. This study provides a new pathway for balancing strength and stress corrosion resistance in ultra-high-strength aluminum alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117168"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940424","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

Retarded relaxation of grain boundaries’ non-equilibrium state in medium-entropy CoFeNi alloy probed by radiotracer diffusion 放射性示踪剂扩散探测中熵CoFeNi合金晶界非平衡态的延迟弛豫

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-07 DOI: 10.1016/j.scriptamat.2025.117162

Bhawna Yadav , Aditya Burla , G. Mohan Muralikrishna , N. Chandrasekaran , K.G. Pradeep , Mayur Vaidya , Gerhard Wilde , Sergiy V. Divinski

引用次数: 0

Irradiation-induced grain boundary migration in an ion irradiated Fe-Ni-Cr-Mn alloy 离子辐照Fe-Ni-Cr-Mn合金辐照诱导晶界迁移

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.scriptamat.2026.117182

Daniele Fattó Offidani, Emmanuelle A. Marquis

引用次数: 0