Scripta Materialia最新文献_第10页

Enhanced mechanical properties and atomic-scale mechanisms of ferroelastic domain switching for GdNbO4-La2Zr2O7 materials 增强 GdNbO4-La2Zr2O7 材料的力学性能和铁弹性畴切换的原子尺度机制

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-16 DOI: 10.1016/j.scriptamat.2024.116374

Xuezhen Cao , Yizhe Li , Ying Chen , Gyn Brewster , David A. Hall , Sarah J. Haigh , João P. Martins , Ping Xiao

{"title":"Enhanced mechanical properties and atomic-scale mechanisms of ferroelastic domain switching for GdNbO4-La2Zr2O7 materials","authors":"Xuezhen Cao , Yizhe Li , Ying Chen , Gyn Brewster , David A. Hall , Sarah J. Haigh , João P. Martins , Ping Xiao","doi":"10.1016/j.scriptamat.2024.116374","DOIUrl":"10.1016/j.scriptamat.2024.116374","url":null,"abstract":"<div><p>Optimization of mechanical properties in La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> (LZO) ceramics, composites and coatings is an on-going requirement for their practical application. Herein, the contribution of monoclinic (La, Gd)NbO<sub>4</sub> (m-LGNO) enhancement of fracture toughness by ∼56% reveals its capability to be a prominent toughening agent. Due to the ferroelastic nature of LGNO, ferroelastic switching takes place within the stress concentrated regions, giving rise to significant strain energy relaxation. Atomic-scale evidence reveals that ferroelastic 94°/86° domain switching can occur, yielding merged 94° domains and newly formed 86° domains. The relevant strains induced by ferroelastic domain switching are quantified up to 8.06% and 6.20% in shear and normal strain, respectively. Such domain switching strains highlight their contribution to accommodate external mechanical loading for the 50 mol% GNO-LZO composite. The results indicate that the unique ferroelastic nature and 94°/86° ferroelastic domain switching in m-LGNO cooperatively provide a significant toughening effect.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116374"},"PeriodicalIF":5.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1359646224004093/pdfft?md5=68e97147ad72d0053d287ebcf3722843&pid=1-s2.0-S1359646224004093-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142244017","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

Chemical short-range ordering accompanies shear band initiation in CrCoNi medium entropy alloy 化学短程有序伴随着铬钴镍中熵合金中剪切带的形成

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-15 DOI: 10.1016/j.scriptamat.2024.116381

Yuan Yuan Tan , Ming Yao Su , Zeng Yu Yang , Tong Li , Jin Xi Chen , Zhong Jun Chen , Guang Mo , Yan Chen , Hai Ying Wang , En E. Ma , Lan Hong Dai

{"title":"Chemical short-range ordering accompanies shear band initiation in CrCoNi medium entropy alloy","authors":"Yuan Yuan Tan , Ming Yao Su , Zeng Yu Yang , Tong Li , Jin Xi Chen , Zhong Jun Chen , Guang Mo , Yan Chen , Hai Ying Wang , En E. Ma , Lan Hong Dai","doi":"10.1016/j.scriptamat.2024.116381","DOIUrl":"10.1016/j.scriptamat.2024.116381","url":null,"abstract":"<div><p>Extended X-ray absorption fine structure (EXAFS), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction have been used to monitor the structural development, on atomic-to-nanometer scale, prior to and along with shear band initiation in a face-centered-cubic CrCoNi medium-entropy alloy (MEA) under impact punch shear loads. Our findings provide clear evidence of chemical ordering with accompanying compositional inhomogeneity, on the length scale of one nanometer at the beginning of shear banding initiation. This chemical short-range atomic rearrangement of the three constituent elemental species is a result of atomic diffusion during high-strain-rate straining. The increasing chemical/structural inhomogeneity is likely to exert perturbations to cause uneven energy dissipation and encourage dislocation slip plane softening, both promoting strain localization that may have helped to instigate shear banding. Dynamic recrystallization is observed in later mature shear bands.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116381"},"PeriodicalIF":5.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232958","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

Chemical strengthening of glass powder particles 玻璃粉颗粒的化学强化

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-12 DOI: 10.1016/j.scriptamat.2024.116368

Malcolm Schaenen , Qi Tang , Jianxiong Li , Mostafa Hassani

引用次数: 0

H2S gas sensing properties of ZnO–SnO2 branch–stem nanowires grown on a copper foil 铜箔上生长的 ZnO-SnO2 支干纳米线的 H2S 气体传感特性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-11 DOI: 10.1016/j.scriptamat.2024.116372

Pham Tien Hung , Dang Thi Huong Thao , Nguyen Manh Hung , Nguyen Van Hoang , Phung Dinh Hoat , Pham Van Thin , Joon-Hyung Lee , Young-Woo Heo

{"title":"H2S gas sensing properties of ZnO–SnO2 branch–stem nanowires grown on a copper foil","authors":"Pham Tien Hung , Dang Thi Huong Thao , Nguyen Manh Hung , Nguyen Van Hoang , Phung Dinh Hoat , Pham Van Thin , Joon-Hyung Lee , Young-Woo Heo","doi":"10.1016/j.scriptamat.2024.116372","DOIUrl":"10.1016/j.scriptamat.2024.116372","url":null,"abstract":"<div><p>ZnO–SnO<sub>2</sub> branch–stem nanowires were fabricated on a Cu foil using a chemical vapor deposition system through a two-step process. Firstly, SnO<sub>2</sub> NWs were synthesized directly on a Cu foil substrate by evaporating SnO powder as a source material. Then, the as-synthesized SnO<sub>2</sub> NWs were used as templates for the growth of ZnO–SnO<sub>2</sub> branch–stem NWs. The effect of growth time on the growth of the SnO<sub>2</sub> NWs on the Cu foil was studied. The gas sensing properties of the SnO<sub>2</sub> NW and ZnO–SnO<sub>2</sub> branch–stem NW devices were studied using various toxic gases at different temperatures. Both devices exhibited high sensitivity, high selectivity, fast response and recovery times, and stability toward H<sub>2</sub>S gas. Compared to the pristine SnO<sub>2</sub> NW device, the ZnO–SnO<sub>2</sub> branch–stem NW device exhibited higher sensitivity and faster response rate toward H<sub>2</sub>S. Finally, the gas sensing mechanism was also discussed.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116372"},"PeriodicalIF":5.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167553","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

Alterable fracture toughness of amorphous silica by injection and removal of electrostatic charge 通过注入和去除静电改变无定形二氧化硅的断裂韧性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-11 DOI: 10.1016/j.scriptamat.2024.116375

Wataru Matsunaga, Seiya Shichino, Takumi Takahashi, Takahiro Shimada, Hiroyuki Hirakata

{"title":"Alterable fracture toughness of amorphous silica by injection and removal of electrostatic charge","authors":"Wataru Matsunaga, Seiya Shichino, Takumi Takahashi, Takahiro Shimada, Hiroyuki Hirakata","doi":"10.1016/j.scriptamat.2024.116375","DOIUrl":"10.1016/j.scriptamat.2024.116375","url":null,"abstract":"<div><p>In this study, we demonstrate that the fracture toughness of amorphous silica, an electrical insulator, can be dramatically increased and restored via injecting and removing the electrical charge content. Micropillar specimens of amorphous silica were fabricated using focused ion beam machining. The specimens were charged by electron-beam irradiation (charged specimens), and the charge was removed from the specimens by exposure to atmospheric conditions and annealing (charge-removed specimens). Fracture toughness testing was conducted on non-charged, charged, and charge-removed micropillar specimens. The fracture toughness of the charged specimen was 2.4 times higher than that of the non-charged specimens. Furthermore, the fracture toughness of the charge-removed specimens was restored to a level similar to that of the non-charged specimens, but not completely restored. These results indicate that the fracture toughness of amorphous silica can be controlled by injecting and removing electrostatic charges.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116375"},"PeriodicalIF":5.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S135964622400410X/pdfft?md5=6cdf357c9ffd0f14a8db259a59dedc66&pid=1-s2.0-S135964622400410X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167151","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

On the correlation between the habit plane and 3D morphology of lath martensite: A direct 3D observation using serial sectioning tomography of a low-carbon stainless steel 板条马氏体的习性面与三维形态之间的相关性：利用低碳不锈钢连续切片断层扫描直接进行三维观察

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-10 DOI: 10.1016/j.scriptamat.2024.116367

Mehdi Mosayebi , Daniel Paquet , Pierre-Antony Deschênes , Laurent Tôn-Thât , Betty Huang , Nabil Bassim

{"title":"On the correlation between the habit plane and 3D morphology of lath martensite: A direct 3D observation using serial sectioning tomography of a low-carbon stainless steel","authors":"Mehdi Mosayebi , Daniel Paquet , Pierre-Antony Deschênes , Laurent Tôn-Thât , Betty Huang , Nabil Bassim","doi":"10.1016/j.scriptamat.2024.116367","DOIUrl":"10.1016/j.scriptamat.2024.116367","url":null,"abstract":"<div><p>The crystallography and morphology of lath martensite in a low-carbon 13Cr-4Ni stainless steel were analyzed by large-volume, high-resolution serial sectioning tomography using a combination of Xe plasma focused ion beam (PFIB) and electron backscatter diffraction (EBSD) analysis. The extracted 3D EBSD results were compared with 2D observations, and potential misinterpretations arising from 2D analyses were highlighted. 3D reconstruction of the packets revealed that the volume of each prior austenite grain (PAG) is occupied with four distinct types of packets, arranged as a specific tetrahedral pattern in 3D. Through geometrical calculations, a direct link between 3D characteristics of this tetrahedral pattern and the dominant habit plane of the microstructure, {557}γ, was established. These findings, unattainable through 2D characterizations, are expected to enhance our understanding of lath martensite formation and inform recent modeling efforts aimed at accurately representing the 3D structure and mechanical properties of these alloys.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116367"},"PeriodicalIF":5.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164011","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 estimation method of the effect of segregated solute on hydrogen-enhanced decohesion at a grain boundary 偏析溶质对晶界氢气增强脱粘效应的定量估算方法

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-10 DOI: 10.1016/j.scriptamat.2024.116366

Masatake Yamaguchi , Ken-ichi Ebihara , Mitsuhiro Itakura , Tomohito Tsuru

引用次数: 0

Hydrogen modified dislocation loop types and shapes in irradiated iron 辐照铁中氢改性位错环类型和形状

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-10 DOI: 10.1016/j.scriptamat.2024.116376

Yifan Ding , Ziqi Cao , Qinghong Zhong , Guang Ran

引用次数: 0

A complex stress-induced dislocation core reconstruction of an edge dislocation on the first pyramidal plane in magnesium and its abnormal dislocation mobility 镁中第一金字塔面上边缘位错的复杂应力诱发位错核心重构及其异常位错移动性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-10 DOI: 10.1016/j.scriptamat.2024.116370

Yingkai Sun , Ziyang Ma , Haijian Chu

引用次数: 0

Recrystallization in a Ni-based single-crystal superalloy traced by quasi-in-situ EBSD 通过准原位 EBSD 追踪镍基单晶超级合金的再结晶过程

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2024-09-10 DOI: 10.1016/j.scriptamat.2024.116369

Yihang Li , Haijing Zhou , Longfei Li , Song Lu , Guang Xie , Jian Zhang , Qiang Feng

{"title":"Recrystallization in a Ni-based single-crystal superalloy traced by quasi-in-situ EBSD","authors":"Yihang Li , Haijing Zhou , Longfei Li , Song Lu , Guang Xie , Jian Zhang , Qiang Feng","doi":"10.1016/j.scriptamat.2024.116369","DOIUrl":"10.1016/j.scriptamat.2024.116369","url":null,"abstract":"<div><p>By using quasi-in-situ EBSD, we successfully probed the nucleation and growth of recrystallized grains during sub-solvus annealing at 1300 °C of an as-cast single-crystal superalloy after pre-compression. It clearly indicated that recrystallization nucleated in the interdendritic region through low-angle grain boundary migration under the experimental condition rather than subgrain coalescence or thermal twinning. Despite being hindered by the undissolved γ′ precipitates in the interdendritic region, these newly formed high-angle grain boundaries could still migrate rapidly. However, the migration velocity will slow quickly as the stored energy decreases. During 10.0-min annealing, the grain boundaries could migrate 14.4–27.4 μm, but the recrystallized grains were still confined in the interdendritic region without abnormal growth. These results provide novel perspective on the comprehension of recrystallization nucleation in single-crystal superalloys and the migration of newly formed high-angle grain boundaries under the hinderance of γ′ precipitates, and are valuable for developing process to control recrystallization.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"255 ","pages":"Article 116369"},"PeriodicalIF":5.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164012","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