Scripta Materialia最新文献_第2页

Revisiting hydrogen trapping in Mg32(Al, Zn)49 approximant crystal: Influence of chemical disorder 再论Mg32(Al, Zn)49近似晶体中的氢俘获：化学无序的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-30 DOI: 10.1016/j.scriptamat.2025.116730

Kazuyuki Shimizu , Masatake Yamaguchi , Satoshi Akamaru , Katsuhiko Nishimura , Rion Abe , Taisuke T. Sasaki , Yafei Wang , Hiroyuki Toda

{"title":"Revisiting hydrogen trapping in Mg32(Al, Zn)49 approximant crystal: Influence of chemical disorder","authors":"Kazuyuki Shimizu , Masatake Yamaguchi , Satoshi Akamaru , Katsuhiko Nishimura , Rion Abe , Taisuke T. Sasaki , Yafei Wang , Hiroyuki Toda","doi":"10.1016/j.scriptamat.2025.116730","DOIUrl":"10.1016/j.scriptamat.2025.116730","url":null,"abstract":"<div><div>The approximant crystal Mg<sub>32</sub>(Al, Zn)<sub>49</sub> (T-phase in Al-Zn-Mg alloys) holds the potential for enhancing both strength and hydrogen embrittlement resistance in aluminum alloys when present as nano-precipitates. Our previous computational exploration indicated strong hydrogen trapping but neglected the inherent chemical disorder of this approximant crystal. This study revisits hydrogen trapping in Mg<sub>32</sub>(Al, Zn)<sub>49</sub>, directly including chemical disorder via special quasirandom structures. Density functional theory calculations reveal that, while chemical disorder introduces variations in trapping energies, the overall trend of strong trapping persists. Tetrahedral sites coordinated by Mg atoms exhibit particularly strong trapping, with smaller tetrahedral volumes correlating with stronger trapping due to enhanced Mg-H interactions. Multiple hydrogen occupation of these sites is also calculated, resulting in high hydrogen densities. Experimental validation using thermal desorption spectroscopy on a bulk Mg<sub>32</sub>(Al, Zn)<sub>49</sub> sample confirms hydrogen trapping, reinforcing the potential of this phase for designing advanced, hydrogen-resistant aluminum alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"265 ","pages":"Article 116730"},"PeriodicalIF":5.3,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892014","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}

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Effects of Re and Ni on high-temperature stability and electrical conductivity in Mo thin films 稀土和镍对钼薄膜高温稳定性和导电性的影响

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-29 DOI: 10.1016/j.scriptamat.2025.116735

Jiachen Zhang , Huajiang Qin , Yuqing Wang , Geng An , Pengfa Feng , Guojun Zhang

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Microstructure and electronic properties of the graphene/{111} copper interface modulated by the rotation angle 旋转角度调制石墨烯/{111}铜界面的微观结构和电子性能

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-28 DOI: 10.1016/j.scriptamat.2025.116689

Zhuoxin Yan, Yu Wang, Jiamiao Ni, Boan Zhong, Jian Song, Yue Liu, Tongxiang Fan

{"title":"Microstructure and electronic properties of the graphene/{111} copper interface modulated by the rotation angle","authors":"Zhuoxin Yan, Yu Wang, Jiamiao Ni, Boan Zhong, Jian Song, Yue Liu, Tongxiang Fan","doi":"10.1016/j.scriptamat.2025.116689","DOIUrl":"10.1016/j.scriptamat.2025.116689","url":null,"abstract":"<div><div>Interfacial structure and characteristics of heterogeneous interfaces are essential for the macro-properties of composites. Particularly for graphene/metal heterojunctions, interface rotation angle variations may cause distinctions in interfacial electronic properties. However, direct experimental evidence is lacking in understanding the corresponding mechanisms. Here, we investigated influential mechanisms of rotation angle differences on interfacial electronic coupling in classical graphene/copper (Gr/Cu) immiscible epitaxial systems. Atomic force microscopy combined with surface potential measurement confirmed that the different rotation angles (∼8°) contributed to a modulated Fermi level in Gr/Cu, indicating varied electron transfer at the interface. Through theoretical analysis, it is found that the modulated interfacial electronic behavior is primarily ascribed to different overlap between C-p and Cu-3d orbitals, resulting from varying fluctuation of graphene and changed minimum Gr/Cu distance at different rotation angles. The mechanism of interfacial electronic properties modulated by the rotation angles could further guide the design of heterogeneous interfaces in electronic applications.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"264 ","pages":"Article 116689"},"PeriodicalIF":5.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879154","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}

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A surprising proliferation of detwinning in β-tin at extreme loading rates 在极端加载速率下β-锡中令人惊讶的孪晶扩散

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-28 DOI: 10.1016/j.scriptamat.2025.116727

W.J. Schill , J. Lind , J.L. Brown , M.B. Prime , S.J. Fensin , D.R. Jones , D.T. Martinez , J.W. Dyer , T.T. Nguyen , M. Nelms , K.L. Schmidt , C.C. Bataile , J.M.D. Lane , N.R. Barton

引用次数: 0

Unique deformation behavior of ultrafine-grained 304 stainless steel at 20 K 超细晶304不锈钢在20k下的独特变形行为

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-26 DOI: 10.1016/j.scriptamat.2025.116726

Wenqi MAO , Wu GONG , Takuro KAWASAKI , Si GAO , Tatsuya ITO , Takayuki YAMASHITA , Stefanus HARJO , Lijia ZHAO , Qiang WANG

{"title":"Unique deformation behavior of ultrafine-grained 304 stainless steel at 20 K","authors":"Wenqi MAO , Wu GONG , Takuro KAWASAKI , Si GAO , Tatsuya ITO , Takayuki YAMASHITA , Stefanus HARJO , Lijia ZHAO , Qiang WANG","doi":"10.1016/j.scriptamat.2025.116726","DOIUrl":"10.1016/j.scriptamat.2025.116726","url":null,"abstract":"<div><div>An ultrafine-grained 304 austenitic stainless steel showed significant serrated Lüders deformation at 20 K, with stress and temperature oscillations of up to 200 MPa and 20 K, respectively. <em>In</em>-<em>situ</em> neutron diffraction and digital image correlation were used to investigate microstructure evolution and phase stress partitioning. The results indicated that Lüders bands propagated discontinuously, accompanied by burst martensite formation. During Lüders deformation, the phase stress in austenite remained lower than that at macroscopic upper yielding, suggesting that the austenite deformed elastically. More interestingly, a unique stress partitioning behavior where the phase stress of martensite remained smaller than that of austenite until fracture was observed during the deformation at 20 K. This might be attributed to the dramatic stress relaxation in martensite caused by the burst martensitic transformation at 20 K. The relatively low phase stress in martensite delayed brittle fracture until the austenite plastically yielded during uniform deformation.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"264 ","pages":"Article 116726"},"PeriodicalIF":5.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877024","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}

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A novel cross-lamellar deformation mechanism through α2 ↔ γ bidirectional phase transformation in a γ-TiAl alloy γ- tial合金中α2↔γ双向相变的新型跨层变形机制

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-26 DOI: 10.1016/j.scriptamat.2025.116724

He Liang , Hongsheng Ding , Xuesong Xu , Xuxing Zhang , Ruirun Chen , Jingjie Guo , Hengzhi Fu

{"title":"A novel cross-lamellar deformation mechanism through α2 ↔ γ bidirectional phase transformation in a γ-TiAl alloy","authors":"He Liang , Hongsheng Ding , Xuesong Xu , Xuxing Zhang , Ruirun Chen , Jingjie Guo , Hengzhi Fu","doi":"10.1016/j.scriptamat.2025.116724","DOIUrl":"10.1016/j.scriptamat.2025.116724","url":null,"abstract":"<div><div>Cross-lamellar deformation is hard to be activated because of the obstruction of α<sub>2</sub>/γ interface to dislocations in the lamellar TiAl alloy. In the present work, continuous shear across the lamellar interface was achieved through twinning and α<sub>2</sub> ↔ γ bidirectional phase transformation during high-temperature tensile deformation. The {20<span><math><mover><mrow><mn>2</mn></mrow><mo>‾</mo></mover></math></span>1} α<sub>2</sub> twins were induced by the stress concentration at the tips of γ twins in adjacent lamellae and propagated through the nanoscale (α<sub>2</sub> + γ) lamellae (γ → <span><math><msubsup><mi>α</mi><mrow><mn>2</mn></mrow><mi>T</mi></msubsup></math></span>), followed by the nucleation and growth of γ phase inside α<sub>2</sub> twins (<span><math><msubsup><mi>α</mi><mrow><mn>2</mn></mrow><mi>T</mi></msubsup></math></span> → γ). The existence of Blackburn orientation relationship between α<sub>2</sub> twin and γ inside it, as well as the Al-rich stacking faults in α<sub>2</sub> twins, provide strong evidence for this bidirectional phase transformation. These findings offer an innovative understanding for the coordinated deformation of (α<sub>2</sub> + γ) lamellar structures and provide a new sight for improving the deformation capacity of TiAl alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"264 ","pages":"Article 116724"},"PeriodicalIF":5.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873578","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

Corrigendum to “Deformation pseudo-twinning of the L21-ordered intermetallic superlattice” [Scripta Materialia 257 (2024) 116468] “l21有序金属间超晶格的变形伪孪晶”的勘误表[Scripta materials 257 (2024) 116468]

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-26 DOI: 10.1016/j.scriptamat.2025.116716

Bailey E. Rhodes , Pulkit Garg , Nicolò Maria della Ventura , Justin A. Mayer , Irene J. Beyerlein , Daniel S. Gianola

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Joule heating enables ultra-fast SiC ceramics joining in seconds 焦耳加热可在几秒钟内实现超快速SiC陶瓷连接

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-24 DOI: 10.1016/j.scriptamat.2025.116721

Jie Xu , Xiaobing Zhou , Qing Huang

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Large thermal hysteresis and high cycling stability induced by aging in a NiTiNb alloy 时效引起的大热滞回和高循环稳定性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-23 DOI: 10.1016/j.scriptamat.2025.116718

Qiuzhen Li , Daqiang Jiang , Yinong Liu , Genfa Kang , Kaiyuan Yu , Jingyuan Guo , Shihan Li , Lishan Cui

{"title":"Large thermal hysteresis and high cycling stability induced by aging in a NiTiNb alloy","authors":"Qiuzhen Li , Daqiang Jiang , Yinong Liu , Genfa Kang , Kaiyuan Yu , Jingyuan Guo , Shihan Li , Lishan Cui","doi":"10.1016/j.scriptamat.2025.116718","DOIUrl":"10.1016/j.scriptamat.2025.116718","url":null,"abstract":"<div><div>This study compares the transformation behavior and thermal cycling stability of a Ni<sub>51</sub>Ti<sub>48.5</sub>Nb<sub>0.5</sub> (at.%) alloy in its solution-treated and low-temperature-aged state. Being Ni-rich of the B2 stoichiometry, low-temperature aging caused the formation of clusters and led to B2 disordering and lattice distortions. In consequence, the alloy exhibited an enlarged B2-B19ʹ transformation thermal hysteresis of approximately 62 °C, in comparison to 40 °C of the solution-treated counterpart. The aged alloy also showed a high cycling stability during 100 thermal transformation cycles, with <1 °C variation of the martensitic transformation temperature as compared to the 20 °C decrement for the solution-treated sample under the same condition. The large thermal hysteresis and high cycling stability of the aged samples may be attributed to the short-range compositional heterogeneity and local lattice distortion which inhibit the interfacial motion and the mobility of dislocations during transformation cycles.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"264 ","pages":"Article 116718"},"PeriodicalIF":5.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863846","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}

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Functional fatigue behavior of [101]- and [111]-oriented superelastic NiTi micropillars [101]和[111]取向超弹性NiTi微柱的功能疲劳行为

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-04-22 DOI: 10.1016/j.scriptamat.2025.116712

Junyu Chen , Fei Liu , Gang Fang , Upadrasta Ramamurty

{"title":"Functional fatigue behavior of [101]- and [111]-oriented superelastic NiTi micropillars","authors":"Junyu Chen , Fei Liu , Gang Fang , Upadrasta Ramamurty","doi":"10.1016/j.scriptamat.2025.116712","DOIUrl":"10.1016/j.scriptamat.2025.116712","url":null,"abstract":"<div><div>Cuboidal micropillars of superelastic NiTi shape memory alloy with [101] and [111] orientations were fabricated using focused ion beam milling and then subjected to cyclic compression. The results indicate that [101]-oriented NiTi is more prone to functional degradation than its [111]-oriented counterpart due to pronounced kinematic irreversibility. In the former, the irreversibility is driven by both dislocation activity and retained martensite, whereas in the latter, degradation is governed exclusively by dislocation accumulation. Cyclic compression causes a significant reduction in the forward transformation stress in the [101] orientation, which disappears upon the removal of retained martensite through heating. In contrast, the transformation stress in the [111] orientation remains broadly invariant, due to the absence of retained martensite, highlighting its dominant role in lowering the forward transformation stress. The work reveals the importance of crystallographic orientations in bringing changes in the fatigue performance and mechanisms of the material at the microscale.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"264 ","pages":"Article 116712"},"PeriodicalIF":5.3,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856047","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