Scripta Materialia最新文献_第10页

Heterogeneous nucleation-driven precipitation of densely distributed nanoscale phases in a low-alloyed magnesium alloy 低合金镁合金中密集分布的纳米相非均相形核驱动析出

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-27 DOI: 10.1016/j.scriptamat.2025.116667

Zhao-Yuan Meng , X.Y. Xu , Shen-Bao Jin , Yu-Long Zhu , Peng Chen , Hui-Yuan Wang

{"title":"Heterogeneous nucleation-driven precipitation of densely distributed nanoscale phases in a low-alloyed magnesium alloy","authors":"Zhao-Yuan Meng , X.Y. Xu , Shen-Bao Jin , Yu-Long Zhu , Peng Chen , Hui-Yuan Wang","doi":"10.1016/j.scriptamat.2025.116667","DOIUrl":"10.1016/j.scriptamat.2025.116667","url":null,"abstract":"<div><div>In this work, we report a heterogeneous nucleation-driven precipitation in a low-alloyed magnesium (Mg) alloy, in which tri-atomic-layer η' phases serve as nucleation sites for Al-Mn-(Ca) precipitates. After peak aging, the alloy exhibits a high density of nanoscale Al-Mn-Ca phases (∼2.5 × 10<sup>23</sup> m<sup>−3</sup>), resulting in a substantial age-hardening response of ∼61 MPa, with no decline observed even after prolonged over-aging for up to 300 h. Atomic-resolution HAADF-STEM and APT analyses reveal a three-stage phase evolution: (I) initial η' phase formation, (II) heterogeneous nucleation of Al-Mn clusters on η' phases, and (III) transformation of Al-Mn clusters into Al-Mn-Ca phases, accompanied by partial η' phase dissolution. Molecular dynamics simulations further identify non-equilibrium stress sites around the tri-atomic-layer Al-Ca η' phases, driving the preferential aggregation of Al-Mn clusters. This work presents a new strategy for precipitate inoculation in solid-state precipitation, offering pathways to enhance precipitate density in Mg alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"263 ","pages":"Article 116667"},"PeriodicalIF":5.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704875","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

Hierarchical multiphase microstructure in additively manufactured (CoCrNi)83Al17 multi-principal element alloy with high strength 增材制造高强度（CoCrNi）83Al17多主元素合金的分层多相组织

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-27 DOI: 10.1016/j.scriptamat.2025.116655

Mengyao Zheng , Chuanwei Li , Yu Liao , Zhong Long , Jianfeng Gu

引用次数: 0

Unprecedented combination of specific tensile strength and ductility achieved in a novel duplex low-density steel 在一种新型双相低密度钢中实现了前所未有的比拉伸强度和延展性的结合

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-27 DOI: 10.1016/j.scriptamat.2025.116668

Zhipeng Liu , Cancan Ding , Ru Ge , Bin Hu , Haiwen Luo

引用次数: 0

Localised stress and strain distribution in sliding 滑动中的局部应力和应变分布

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-27 DOI: 10.1016/j.scriptamat.2025.116662

Anna Kareer , Eralp Demir , Edmund Tarleton , Christopher Hardie

引用次数: 0

Fully restoring the damaged ductility of H-charged medium Mn steel via pulsed current 脉冲电流使充氢介质Mn钢的塑性完全恢复

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-26 DOI: 10.1016/j.scriptamat.2025.116663

Bin Hu , Shiji Geng , Nima Babaei , Alexander Gramlich , Yichao Bai , Wenting Zhao , Junkui Li , Xinjun Sun , Caijun Zhang , Ulrich Krupp , Haiwen Luo

引用次数: 0

Coupling strengthening with local stress relaxation in an 800 MPa yield strength strain transformable titanium alloy 800 MPa屈服强度应变变形钛合金的局部应力松弛耦合强化

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-26 DOI: 10.1016/j.scriptamat.2025.116669

N. Keskar , S.A. Mantri , Y. Danard , T. Ingale , M.S.K.K.Y. Nartu , P. Agrawal , L. Lilensten , F. Sun , F. Prima , R. Banerjee

{"title":"Coupling strengthening with local stress relaxation in an 800 MPa yield strength strain transformable titanium alloy","authors":"N. Keskar , S.A. Mantri , Y. Danard , T. Ingale , M.S.K.K.Y. Nartu , P. Agrawal , L. Lilensten , F. Sun , F. Prima , R. Banerjee","doi":"10.1016/j.scriptamat.2025.116669","DOIUrl":"10.1016/j.scriptamat.2025.116669","url":null,"abstract":"<div><div>A novel strain transformable β-metastable titanium alloy, Ti–7.5 Cr–1Sn–1Fe (TCSF), was designed using the \"d-electron alloy design\" method to achieve a unique balance of twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) deformation mechanisms. Tensile testing revealed excellent tensile properties, including a high yield strength ∼800 MPa, an ultimate tensile strength ∼1400 MPa, and exceptional strain-hardening over extended plastic deformation. Microstructural analysis revealed a high density of {332}〈113〉 deformation twins, with stress-induced α″ martensite forming at the twin/matrix interfaces, facilitating internal stress relaxation. This alloy exhibits a dynamic composite effect, driven by hierarchical deformation twin networks obstructing dislocation motion, enhancing strain hardening, while the local stresses generated by the deformation twinning is relaxed by stress induced martensite formation at the twin/matrix interface, promoting uniform elongation. This study highlights promising design strategies for high strength and strain hardenable Ti alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"262 ","pages":"Article 116669"},"PeriodicalIF":5.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697792","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

Measuring the elastic properties of the Gibeon meteorite using laser ultrasound 用激光超声测量吉本陨石的弹性特性

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-26 DOI: 10.1016/j.scriptamat.2025.116666

Wenqi Li, Matt Clark, Richard J. Smith

{"title":"Measuring the elastic properties of the Gibeon meteorite using laser ultrasound","authors":"Wenqi Li, Matt Clark, Richard J. Smith","doi":"10.1016/j.scriptamat.2025.116666","DOIUrl":"10.1016/j.scriptamat.2025.116666","url":null,"abstract":"<div><div>Meteorites provide access to information on the formation and evolution of planetary bodies which is otherwise difficult to study. The unique nature of these samples and their relative scarcity means that non-destructive analysis techniques are needed to study their properties.</div><div>This paper uses the laser ultrasound technique spatially resolved acoustic spectroscopy to non-destructively determine both the crystal orientation and the single crystal elastic constants (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>i</mi><mi>j</mi></mrow></msub></math></span>) of a sample of the Gibeon meteorite. There are no published values to directly compare the results of this study, as non-destructive measurements of the single crystal elasticity on granular material have not been possible. Therefore, comparisons with theoretical values for man-made iron-nickel alloys are given showing the <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>i</mi><mi>j</mi></mrow></msub></math></span> values are in the expected range. There are studies providing bulk elastic properties of meteorites, and so calculated bulk properties derived from the single crystal elasticity measurements are compared and also agree well.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"262 ","pages":"Article 116666"},"PeriodicalIF":5.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697700","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

Theoretical ab initio predictions of L12-Al3Zr structure stabilization by vacancy incorporation on the Zr sublattice Zr亚晶格空位引入对L12-Al3Zr结构稳定性的理论从头算预测

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-25 DOI: 10.1016/j.scriptamat.2025.116661

Flemming J.H. Ehlers , Qingkun Tian , Lipeng Ding , Zhihong Jia

{"title":"Theoretical ab initio predictions of L12-Al3Zr structure stabilization by vacancy incorporation on the Zr sublattice","authors":"Flemming J.H. Ehlers , Qingkun Tian , Lipeng Ding , Zhihong Jia","doi":"10.1016/j.scriptamat.2025.116661","DOIUrl":"10.1016/j.scriptamat.2025.116661","url":null,"abstract":"<div><div>This work studies the effect of Zr sublattice vacancy (V<sub>Zr</sub>) incorporation on the L1<sub>2</sub>-Al<sub>3</sub>Zr structure stabilization by first-principles calculations. It is revealed that incorporation of such vacancies in the metastable L1<sub>2</sub> phase is thermodynamically favored, with the energetically most preferred L1<sub>2</sub>-Al<sub>3</sub>Zr<sub>(1-x)</sub>(V<sub>Zr</sub>)<sub>x</sub> configuration significantly reducing the L1<sub>2</sub> → D0<sub>23</sub> transformation driving force at experimentally relevant temperatures. The absence of experimental observation of any significant V<sub>Zr</sub> concentration in L1<sub>2</sub> is proposed to result from an unfavorable Zr sublattice vacancy incorporation at the dispersoid-matrix interface, coupled with restrictive diffusion paths of Zr in the precipitate, with calculations providing potential support for this hypothesis. The present findings suggest that a circumvention of this dispersoid-matrix interface barrier to V<sub>Zr</sub> incorporation may notably increase the thermal stability of L1<sub>2</sub>, representing an important feature on an alternative route to the development of castable Al alloys with superior thermal stability.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"262 ","pages":"Article 116661"},"PeriodicalIF":5.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682421","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

Revisiting the phase transformations of wüstite scale formed on low carbon steel 再论低碳钢上形成的w<s:1> site尺度的相变

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-24 DOI: 10.1016/j.scriptamat.2025.116657

Cheng-Hung Shih , Liuwen Chang , Wei-Lin Wang , Kuang-Kuo Wang

引用次数: 0

Growth of F-doped BaBiO3 thin films via flow-limited field-injection electrostatic spraying toward experimental realization of wide bandgap topological insulator 限流场注入静电喷涂法生长含f掺杂的BaBiO3薄膜，实现宽频隙拓扑绝缘体的实验

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-23 DOI: 10.1016/j.scriptamat.2025.116656

Riley Vesto , Hyungsoo Choi , Kyekyoon Kim

引用次数: 0