Scripta Materialia最新文献

Heterogeneous nucleation-driven precipitation of densely distributed nanoscale phases in a low-alloyed magnesium alloy

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

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

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

Fully restoring the damaged ductility of H-charged medium Mn steel via pulsed current

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

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

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

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

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

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

Strain partitioning-induced anisotropy in thermomechanically processed magnesium alloys comprised of earth-abundant elements

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-03-22 DOI: 10.1016/j.scriptamat.2025.116659

Jishnu J. Bhattacharyya , Seth Faberman , Aaron Sullivan , Mainak Saha , Taisuke Sasaki , Sean R. Agnew

{"title":"Strain partitioning-induced anisotropy in thermomechanically processed magnesium alloys comprised of earth-abundant elements","authors":"Jishnu J. Bhattacharyya , Seth Faberman , Aaron Sullivan , Mainak Saha , Taisuke Sasaki , Sean R. Agnew","doi":"10.1016/j.scriptamat.2025.116659","DOIUrl":"10.1016/j.scriptamat.2025.116659","url":null,"abstract":"<div><div>Dilute Mg alloys based upon earth-abundant elements, e.g., Al, Ca, and Zn have attractive combinations of strength, ductility, and workability. Even higher strength can be obtained in work-hardened material without the heat treatments required to induce Guinier-Preston zone strengthening of previously studied versions of these alloys. This stems from a slightly stronger crystallographic texture than is present after solutionizing, a high dislocation density, and to a lesser degree, a fine distribution of globular Zn-rich precipitates. The anisotropic plastic response of sheet material is described using an elasto-viscoplastic self-consistent (EVPSC) polycrystal model. Strain partitioning between grains during rolling-induced strain hardening is held responsible for the yield strength, ductility, and especially, strain hardening anisotropy. Texture-induced plastic anisotropy is well-known, but the effect of strong partitioning of strain between variously oriented grains is critical to explain what may be classified as a sort of strain path change (generalized Bauschinger) effect.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"262 ","pages":"Article 116659"},"PeriodicalIF":5.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682419","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