Scripta Materialia最新文献_第8页

Template-synthesizing hollow cubic CeO2/Co3O4 heterostructure as electrocatalysts for sensing hydrogen peroxide 模板合成空心立方 CeO2/Co3O4 异质结构作为感应过氧化氢的电催化剂

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-27 DOI: 10.1016/j.scriptamat.2024.116397

Hao Zhou , Huali Zheng , Wenbing Shi , Xiaoqing Ma

引用次数: 0

Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ/γ′ lattice misfit 具有较小γ/γ′晶格失配的单晶超合金在蠕变变形过程中位错网络的异常致密化

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-27 DOI: 10.1016/j.scriptamat.2024.116399

Xipeng Tao, Xinguang Wang, Jinguo Li, Xiaofeng Sun, Yizhou Zhou

{"title":"Abnormal densification of dislocation networks during creep deformation in a single crystal superalloy with a small γ/γ′ lattice misfit","authors":"Xipeng Tao, Xinguang Wang, Jinguo Li, Xiaofeng Sun, Yizhou Zhou","doi":"10.1016/j.scriptamat.2024.116399","DOIUrl":"10.1016/j.scriptamat.2024.116399","url":null,"abstract":"<div><div>Generally, with a large lattice misfit, dislocations tend to move smoothly via cross-slip in γ channels, and rapidly reorient themselves from the 〈110〉 to 〈100〉 direction on the surface of γ′ cuboids to form complete networks in single-crystal superalloys. However, in this study, dense and complete dislocation networks also formed in a single-crystal superalloy with a small γ/γ′ lattice misfit during high-temperature creep deformation. The abnormal densification of dislocation networks was proven to be related to the anomalous enrichment of W and Ta in γ′ phases during the secondary creep stage. Microstructural analysis suggested that anomalous enrichment contributed to an elevated antiphase boundary energy (APBE) of γ′ phases and led to more vacancies within the γ phase, promoting dislocation climb. The higher APBE of γ′ phases impeded dislocations from cutting into γ′ phases, providing enough time for interfacial dislocations to climb through vacancies and rotate to form dense dislocation networks.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116399"},"PeriodicalIF":5.3,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326907","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

Intermittent in-situ high-resolution X-ray microscopy of 400-nm porous glass under uniaxial compression: Study of pore changes and crack formation 单轴压缩下 400 纳米多孔玻璃的间歇性原位高分辨率 X 射线显微镜：孔隙变化和裂纹形成研究

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-26 DOI: 10.1016/j.scriptamat.2024.116396

Sebastian Schäfer , François Willot , Hrishikesh Bale , Mansoureh Norouzi Rad , Stephen T. Kelly , Dirk Enke , Juliana Martins de Souza e Silva

{"title":"Intermittent in-situ high-resolution X-ray microscopy of 400-nm porous glass under uniaxial compression: Study of pore changes and crack formation","authors":"Sebastian Schäfer , François Willot , Hrishikesh Bale , Mansoureh Norouzi Rad , Stephen T. Kelly , Dirk Enke , Juliana Martins de Souza e Silva","doi":"10.1016/j.scriptamat.2024.116396","DOIUrl":"10.1016/j.scriptamat.2024.116396","url":null,"abstract":"<div><div>Understanding the relationship between the structure of porous glasses and their failure behavior is crucial for developing reliable porous glasses for specific applications. In this study, we used nanometer resolution X-ray computed tomography (nano-CT) to image a controlled pore glass (CPG) with 400 nm-sized pores under <em>in-situ</em> uniaxial compression. Our results demonstrate that <em>in-situ</em> nano-CT is an excellent tool for identifying damage mechanisms in 400 nm pore glass. It allowed us to track changes in the shape of pores and pore walls during compression until the specimen failed. We also used computational tools to analyze the microstructural changes within the CPG sample, mapping displacements and strain fields. Additionally, we simulated the behavior of the CPG using a Fast Fourier Transform/Phase Field method. Both experimental and numerical data revealed local shear deformation occurring along bands, consistent with the appearance and propagation of ± 45-degree cracks.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116396"},"PeriodicalIF":5.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322644","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

Quantitative evaluation of local strain distribution induced by deformation twins and triggering effect of deformation twinning on neighboring grains in polycrystalline AZ31 magnesium alloys 定量评估多晶 AZ31 镁合金中变形孪晶诱发的局部应变分布以及变形孪晶对相邻晶粒的触发效应

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-25 DOI: 10.1016/j.scriptamat.2024.116388

Saho Yako, Myeong-heom Park, Nobuhiro Tsuji

{"title":"Quantitative evaluation of local strain distribution induced by deformation twins and triggering effect of deformation twinning on neighboring grains in polycrystalline AZ31 magnesium alloys","authors":"Saho Yako, Myeong-heom Park, Nobuhiro Tsuji","doi":"10.1016/j.scriptamat.2024.116388","DOIUrl":"10.1016/j.scriptamat.2024.116388","url":null,"abstract":"<div><div><span><math><mrow><mrow><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>2</mn><mo>}</mo></mrow><mspace></mspace><mtext><</mtext><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>011</mn><mtext>></mtext></mrow></math></span> deformation twinning commonly occurs in Mg/Mg alloys. In their polycrystals, however, twinning is not always activated at locations with high Schmid factor for <span><math><mrow><mrow><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>2</mn><mo>}</mo></mrow><mtext><</mtext><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>011</mn><mtext>></mtext></mrow></math></span> twinning. It is believed that twinning behavior in polycrystalline Mg/Mg alloys can be understood with a consideration of interaction between adjacent twins as well as local deformation behavior on a micro- and meso‑structural scale. In this study, we theoretically estimate local plastic strain within twins by transforming coordinates and then compare it with that experimentally obtained from digital image correlation (DIC) analysis for understanding the reason for non-Schmid twinning in polycrystalline-Mg alloys. The theoretically estimated strain of twins was found to be in good agreement with the DIC-strain value. Furthermore, it was observed that the variant selection of twin can be explained by the compatibility parameter <em>m</em>’, rather than Schmid factor, suggesting that twin activation in polycrystalline-Mg is strongly influenced by adjacently appeared twins.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116388"},"PeriodicalIF":5.3,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319676","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

Simultaneously enhancing the strength and ductility of Cu-Ti-Fe alloy through electric current pulse induced precipitation 通过电流脉冲诱导沉淀同时提高铜钛铁合金的强度和延展性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-25 DOI: 10.1016/j.scriptamat.2024.116387

Gaolei Xu , Yunqing Zhu , Lijun Peng , Xujun Mi , Haofeng Xie , Yicheng Cao , Xuehua Li

{"title":"Simultaneously enhancing the strength and ductility of Cu-Ti-Fe alloy through electric current pulse induced precipitation","authors":"Gaolei Xu , Yunqing Zhu , Lijun Peng , Xujun Mi , Haofeng Xie , Yicheng Cao , Xuehua Li","doi":"10.1016/j.scriptamat.2024.116387","DOIUrl":"10.1016/j.scriptamat.2024.116387","url":null,"abstract":"<div><div>Cu-Ti alloys are key materials for use of next-generation high-strength elastic components to replace hazardous Cu-Be alloys, but the tensile strength and ductiltiy are difficult to cooperative control through the conventional aging treatment. In this study, we successfully induced an electric current pulse (ECP) to promote the nucleation and precipitation of metastable phases during the fabrication of Cu-Ti-Fe alloy. It is noteworthy that a large quantity of the nanoscale β'-Cu<sub>4</sub>Ti phase rapidly precipitated under an extremely short electropulse duration (90 s). After further aging, higher density and finer β'-Cu<sub>4</sub>Ti precipitates were detected in the matrix, which significantly hindered the occurrence of discontinuous precipitation (DP) behavior. Compared with traditional aging treatment, the tensile strength and elongation of alloy with ECP and aging increased by 103 MPa and 8%, respectively. These results provide guidance for the simultaneous strength–ductility enhancements of various metallic materials.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116387"},"PeriodicalIF":5.3,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319677","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

Superior high-temperature strength of a carbide-reinforced high-entropy alloy with ultrafine eutectoid structure 具有超细共晶结构的碳化物强化高熵合金的优异高温强度

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-25 DOI: 10.1016/j.scriptamat.2024.116393

Xiao Wang , Guoqiang Luo , Qinqin Wei , Yi Sun , Wei Huang , Jian Peng , Jian Zhang , Qiang Shen

{"title":"Superior high-temperature strength of a carbide-reinforced high-entropy alloy with ultrafine eutectoid structure","authors":"Xiao Wang , Guoqiang Luo , Qinqin Wei , Yi Sun , Wei Huang , Jian Peng , Jian Zhang , Qiang Shen","doi":"10.1016/j.scriptamat.2024.116393","DOIUrl":"10.1016/j.scriptamat.2024.116393","url":null,"abstract":"<div><div>Refractory alloys with high-temperature softening resistance are crucial for extreme high-temperature components in aerospace and weapon equipment. Traditional alloys and single-phase refractory high-entropy alloys suffer from unstable microstructures and loss of strength at high temperatures. Here we report a strategy to obtain a superior strong high-entropy alloy by introducing carbides to form micro-nano scale eutectic and eutectoid structures. These metal-carbide interfaces remain stable under high-temperature deformation and exhibit strong dislocation blocking effects. The ultrafine eutectoid structure provides a primary strengthening effect due to its numerous enhanced phase interfaces. The resulting alloy achieves a high temperature yield strength of 1.17 GPa at 1473 K and 0.92 GPa at 1673 K. This work provides valuable insights for optimizing the high-temperature performance and microstructure design of high-temperature composites to further extend their potential applications in high-temperature areas.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116393"},"PeriodicalIF":5.3,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319675","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

Phase evolutions and the growth of Kirkendall voids in the V–Zn system V-Zn 系统中的相变和 Kirkendall 空洞的增长

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-25 DOI: 10.1016/j.scriptamat.2024.116391

Shubhangini Yadav, Varun A. Baheti

引用次数: 0

Diffusible hydrogen facilitated stress corrosion cracking in 316 stainless steel using in-situ gaseous hydrogen charging in simulated PWR environment 在模拟压水堆环境中使用原位气态充氢，扩散氢促进 316 不锈钢的应力腐蚀开裂

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-24 DOI: 10.1016/j.scriptamat.2024.116390

Zihao Wang , Houzhi Liu , Yutaka Watanabe , Tetsuo Shoji , Xiangyu Zhong , Zhengcao Li , Sergio Lozano-Perez

{"title":"Diffusible hydrogen facilitated stress corrosion cracking in 316 stainless steel using in-situ gaseous hydrogen charging in simulated PWR environment","authors":"Zihao Wang , Houzhi Liu , Yutaka Watanabe , Tetsuo Shoji , Xiangyu Zhong , Zhengcao Li , Sergio Lozano-Perez","doi":"10.1016/j.scriptamat.2024.116390","DOIUrl":"10.1016/j.scriptamat.2024.116390","url":null,"abstract":"<div><div>In this article, we introduce a novel in-situ hydrogen charging method for stress corrosion cracking (SCC) testing in a high-temperature and high-pressure water environment at 325 °C for the first time. This method effectively mitigates the interference of the electrochemical charging on the corrosion potential, and the limitation of maintaining a stable hydrogen concentration in the materials using any pre-charge methods. This approach ensures a sufficient and stable amount of diffusible hydrogen (DiffH) within the alloy matrix, which effectively maximizes the effect of diffusible hydrogen in the matrix influencing SCC at high temperatures. Post-experimental characterization reveals that DiffH has a significant impact on the oxidation behaviour near the crack tip. Notably, diffusion induced grain boundary migration (DIGM) is greatly reduced while the preferential intergranular oxidation is still present, suggesting a complex role of DiffH on SCC.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116390"},"PeriodicalIF":5.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1359646224004251/pdfft?md5=757407cce6af68c596facc399c5ac204&pid=1-s2.0-S1359646224004251-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314860","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

Coarsening kinetics of alloy-doped nanoporous metals 合金掺杂纳米多孔金属的粗化动力学

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-24 DOI: 10.1016/j.scriptamat.2024.116373

Luis Granadillo , Joshua Snyder , Zhiyong Xia , Ian McCue

引用次数: 0

Beyond the dynamic Hall-Petch effect: Mechanical twinning for microscopic strain delocalization 超越动态霍尔-佩奇效应：微观应变分散的机械孪晶

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-24 DOI: 10.1016/j.scriptamat.2024.116346

Jiyun Kang, C. Cem Tasan

{"title":"Beyond the dynamic Hall-Petch effect: Mechanical twinning for microscopic strain delocalization","authors":"Jiyun Kang, C. Cem Tasan","doi":"10.1016/j.scriptamat.2024.116346","DOIUrl":"10.1016/j.scriptamat.2024.116346","url":null,"abstract":"<div><div>Mechanically-induced twinning is considered a beneficial deformation micro-mechanism, primarily due to the dynamic Hall-Petch effect arising from grain size refinement through twinning processes. Yet, in alloys where damage initiation is strongly texture-dependent, the orientation change associated with mechanically-induced twinning can also yield advantagenous outcomes. To demonstrate this, we employ high-resolution in-situ microstructure-based digital image correlation (μ-DIC) techniques to investigate strain heterogeneity modulated by the activation of <span><math><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mrow><mo>¯</mo></mrow></mover><mn>2</mn><mo>}</mo></math></span> extension twinning and its macroscopic consequences in a titanium alloy. Our observations reveal the formation of intense strain localization bands due to pyramidal I <c+a> slip activation in the early plasticity regime (<em>ε</em>∼0.01). However, the intensity of these bands diminishes as <span><math><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mrow><mo>¯</mo></mrow></mover><mn>2</mn><mo>}</mo></math></span> twins nucleate and propagate. As deformation progresses, the strain distribution becomes more uniform across the microstructure, attributed to strain delocalization effects caused by twin propagation. Quantitative damage analysis suggests that strain delocalization by <span><math><mo>{</mo><mn>10</mn><mover><mrow><mn>1</mn></mrow><mrow><mo>¯</mo></mrow></mover><mn>2</mn><mo>}</mo></math></span> twin activation can enhance microstructural damage resistance.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116346"},"PeriodicalIF":5.3,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314859","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