I. Ivanov, J. J. G. Moreno, K. Emurlaev, D. Lazurenko, I. Bataev
It is generally believed, that the dislocation density in cold-worked metals decreases during recovery. Here, we used in-situ synchrotron X-ray diffraction to show that the dislocation density in [[EQUATION]] -titanium increases at the initial stages of heating. Under conditions of low dislocation mobility, the generation of new dislocation decreases the overall level of stresses in the deformed material. This phenomenon was clearly confirmed by classical molecular dynamics simulations. The dislocation reactions and dislocations dynamics were considered in detail.
{"title":"Anomalous Growth of Dislocation Density in Titanium During Recovery","authors":"I. Ivanov, J. J. G. Moreno, K. Emurlaev, D. Lazurenko, I. Bataev","doi":"10.2139/ssrn.3931609","DOIUrl":"https://doi.org/10.2139/ssrn.3931609","url":null,"abstract":"It is generally believed, that the dislocation density in cold-worked metals decreases during recovery. Here, we used in-situ synchrotron X-ray diffraction to show that the dislocation density in [[EQUATION]] -titanium increases at the initial stages of heating. Under conditions of low dislocation mobility, the generation of new dislocation decreases the overall level of stresses in the deformed material. This phenomenon was clearly confirmed by classical molecular dynamics simulations. The dislocation reactions and dislocations dynamics were considered in detail.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82360575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jie Wang, Yu-ling Tang, Shun Li, Zhouran Zhang, Y. Ye, Li'an Zhu, S. Bai
To determine the effect of mixing entropy on multicomponent alloys and to find the mixing entropy threshold for entropy-tailored materials, including high-entropy alloys and medium-entropy alloys, the microstructure and mechanical properties of 23 Ti-Zr-Nb-V alloys were investigated. The Laves phase content of Ti-Zr-Nb-V alloys was obtained using image recognition technology . According to the component threshold for Laves phases and HCP phase disappearance, V(Nb)-Zr(Ti) pseudo-binary phase diagrams, which can predict the phases of ternary Ti-Zr-V and Zr-Nb-V alloys, were established. By comparing the Laves phase content in Ti-Zr-Nb-V alloys obtained from experimental statistics, pseudo-binary phase diagrams and thermodynamic calculations, the Δ S mix threshold for entropy-tailored materials was 1.10~1.21R. The dependence of the yield strength and fracture strain of the Ti-Zr-Nb-V alloys further reveals that the mechanical properties of entropy-tailored alloys are essentially controlled.
{"title":"Mixing Entropy Threshold for Entropy-Tailored Materials","authors":"Jie Wang, Yu-ling Tang, Shun Li, Zhouran Zhang, Y. Ye, Li'an Zhu, S. Bai","doi":"10.2139/ssrn.3897764","DOIUrl":"https://doi.org/10.2139/ssrn.3897764","url":null,"abstract":"To determine the effect of mixing entropy on multicomponent alloys and to find the mixing entropy threshold for entropy-tailored materials, including high-entropy alloys and medium-entropy alloys, the microstructure and mechanical properties of 23 Ti-Zr-Nb-V alloys were investigated. The Laves phase content of Ti-Zr-Nb-V alloys was obtained using image recognition technology . According to the component threshold for Laves phases and HCP phase disappearance, V(Nb)-Zr(Ti) pseudo-binary phase diagrams, which can predict the phases of ternary Ti-Zr-V and Zr-Nb-V alloys, were established. By comparing the Laves phase content in Ti-Zr-Nb-V alloys obtained from experimental statistics, pseudo-binary phase diagrams and thermodynamic calculations, the Δ S mix threshold for entropy-tailored materials was 1.10~1.21R. The dependence of the yield strength and fracture strain of the Ti-Zr-Nb-V alloys further reveals that the mechanical properties of entropy-tailored alloys are essentially controlled.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87140687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tomohiko Hojo, M. Koyama, Bakuya Kumai, Y. Shibayama, A. Shiro, T. Shobu, H. Saitoh, Saya Ajito, E. Akiyama
The origins of the superior work hardening capability of medium manganese (M-Mn) and conventional transformation-induced plasticity-aided bainitic ferrite (TBF) steels of similar tensile strength and elongation are comparatively investigated via synchrotron X-ray diffraction measurements. The M-Mn steel undergoes preferential plastic deformation in austenite; its superior work hardening capability and associated uniform elongation are attributed to the high rates of martensitic transformation and dislocation accumulation per strain in the retained austenite. By contrast, the excellent work hardening behavior and uniform elongation of the TBF steel are attributed to the sustained transformability until the occurrence of a large strain and significant stress partitioning between the face-centered cubic (FCC) and body-centered cubic (BCC) phases due to the high austenite phase stability and high resistance to slip deformation of austenite.
{"title":"Comparative Study of Stress and Strain Partitioning Behaviors in Medium Manganese and Transformation-Induced Plasticity-Aided Bainitic Ferrite Steels","authors":"Tomohiko Hojo, M. Koyama, Bakuya Kumai, Y. Shibayama, A. Shiro, T. Shobu, H. Saitoh, Saya Ajito, E. Akiyama","doi":"10.2139/ssrn.3918921","DOIUrl":"https://doi.org/10.2139/ssrn.3918921","url":null,"abstract":"The origins of the superior work hardening capability of medium manganese (M-Mn) and conventional transformation-induced plasticity-aided bainitic ferrite (TBF) steels of similar tensile strength and elongation are comparatively investigated via synchrotron X-ray diffraction measurements. The M-Mn steel undergoes preferential plastic deformation in austenite; its superior work hardening capability and associated uniform elongation are attributed to the high rates of martensitic transformation and dislocation accumulation per strain in the retained austenite. By contrast, the excellent work hardening behavior and uniform elongation of the TBF steel are attributed to the sustained transformability until the occurrence of a large strain and significant stress partitioning between the face-centered cubic (FCC) and body-centered cubic (BCC) phases due to the high austenite phase stability and high resistance to slip deformation of austenite.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79052180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Grain-environment heterogeneity has been known to play a vital role in grain growth kinetics. In general, the topological correlation between grains and first nearest neighbors is described by the famous Aboav-Weaire law. However, its predictions in 3-D normal grain growth do not exactly match the experiments and simulations. In this work, with an approximation of the MacPherson-Srolovitz law, an alternative approach of the A-W relation is developed from the modified mean-field model. The predictions are not only significantly closer to the reality, but also successfully reflects the effect of grain-environment heterogeneity on the normalized grain growth rate.
{"title":"The 3-D Aboav-Weaire Relation From Modified Mean-Field Model","authors":"Yue Li, Zhijun Wang, Junjie Li, Jincheng Wang","doi":"10.2139/ssrn.3927819","DOIUrl":"https://doi.org/10.2139/ssrn.3927819","url":null,"abstract":"Grain-environment heterogeneity has been known to play a vital role in grain growth kinetics. In general, the topological correlation between grains and first nearest neighbors is described by the famous Aboav-Weaire law. However, its predictions in 3-D normal grain growth do not exactly match the experiments and simulations. In this work, with an approximation of the MacPherson-Srolovitz law, an alternative approach of the A-W relation is developed from the modified mean-field model. The predictions are not only significantly closer to the reality, but also successfully reflects the effect of grain-environment heterogeneity on the normalized grain growth rate.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76702208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Understanding the metallurgical joinability of pure Mg and pure Fe and their interfacial microstructure lays the foundation for deciphering the complicated mechanism of joining various magnesium alloys and steels in applications. Pure Mg and pure Fe were successfully joined to form a metallurgical bond for the first time using the friction stir assisted scribe technique. Through detailed characterization, we found that the two immiscible metals are bonded by a critical interfacial oxide layer that spans only ~40 ± 10 nm. We present the first direct experimental evidence of the presence of a Mg/Fe oxide rich interfacial layer using high-resolution electron microscopy and discuss the contribution of oxide formation toward a successful joining mechanism.
{"title":"Metallurgical Joining of Immiscible System: Pure Mg and Pure Fe","authors":"H. Das, B. Gwalani, Xiaolong Ma, P. Upadhyay","doi":"10.2139/ssrn.3949512","DOIUrl":"https://doi.org/10.2139/ssrn.3949512","url":null,"abstract":"Understanding the metallurgical joinability of pure Mg and pure Fe and their interfacial microstructure lays the foundation for deciphering the complicated mechanism of joining various magnesium alloys and steels in applications. Pure Mg and pure Fe were successfully joined to form a metallurgical bond for the first time using the friction stir assisted scribe technique. Through detailed characterization, we found that the two immiscible metals are bonded by a critical interfacial oxide layer that spans only ~40 ± 10 nm. We present the first direct experimental evidence of the presence of a Mg/Fe oxide rich interfacial layer using high-resolution electron microscopy and discuss the contribution of oxide formation toward a successful joining mechanism.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73559446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Yıldırım, M. Marioni, C. Falub, H. Rohrmann, D. Jaeger, Marco Rechsteiner, D. Schneider, H. Hug
Magnetic properties of [Co(0.4 nm)/Pt(0.7 nm)]5 multilayers are tailored by controlling the sputtering voltage during the growth of cobalt layers by a facing target cathode. It is shown that increasing sputtering voltage up to 150 V leads to an improved crystalline texture and this results in larger magnetic anisotropies and out-of-plane coercive fields. At a higher cathode voltage of 540 V however crystalline texture quality slightly worsens and this is accompanied by a decrease in the effective anisotropy. Using facing target cathode sputtering, the crystalline structure of the multilayers can be controlled without applying any heat treatment and this can be used to optimize the magnetic properties of Co/Pt multilayers for specific applications.
{"title":"Tuning the Perpendicular Magnetic Anisotropy in Co/Pt Multilayers Grown by Facing Target Sputtering and Conventional Sputtering","authors":"O. Yıldırım, M. Marioni, C. Falub, H. Rohrmann, D. Jaeger, Marco Rechsteiner, D. Schneider, H. Hug","doi":"10.2139/ssrn.3891420","DOIUrl":"https://doi.org/10.2139/ssrn.3891420","url":null,"abstract":"Magnetic properties of [Co(0.4 nm)/Pt(0.7 nm)]5 multilayers are tailored by controlling the sputtering voltage during the growth of cobalt layers by a facing target cathode. It is shown that increasing sputtering voltage up to 150 V leads to an improved crystalline texture and this results in larger magnetic anisotropies and out-of-plane coercive fields. At a higher cathode voltage of 540 V however crystalline texture quality slightly worsens and this is accompanied by a decrease in the effective anisotropy. Using facing target cathode sputtering, the crystalline structure of the multilayers can be controlled without applying any heat treatment and this can be used to optimize the magnetic properties of Co/Pt multilayers for specific applications.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80230042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenbin Zhao, Kun Zhang, E. Guo, Lei Zhao, X. Tian, Chang-long Tan
Abstract Mg-Sc alloys are known as novel and promising lightweight shape memory alloys (LWSMAs), which have outstanding performance. Yet, a precise understanding of the microscopic picture and interactions governing the martensitic transformation (MT) remains elusive. We systematically investigate the MT of Mg-Sc alloys using first-principles methods. The result of generalized solid-state nudged elastic band methods confirms that no energy barrier inhibits the MT. We show that the bcc structure of Mg26Sc6 is dynamical instability at 0 K caused by electron-phonon coupling and Fermi surface nesting. Particularly, the high-temperature stability of Mg26Sc6 is revealed for the first time using the temperature-dependent effective potential method. The softening of the acoustic mode at Γ-R corresponds to two neighboring (1 0 1) planes moving towards each other, and forms martensite phase. Our calculations provide the complete and atomic-level mechanism for the MT of Mg-Sc alloys and shed some light on the design of new LWSMAs.
{"title":"Martensitic Transformation Mechanism of Mg-Sc Lightweight Shape Memory Alloys","authors":"Wenbin Zhao, Kun Zhang, E. Guo, Lei Zhao, X. Tian, Chang-long Tan","doi":"10.2139/ssrn.3881302","DOIUrl":"https://doi.org/10.2139/ssrn.3881302","url":null,"abstract":"Abstract Mg-Sc alloys are known as novel and promising lightweight shape memory alloys (LWSMAs), which have outstanding performance. Yet, a precise understanding of the microscopic picture and interactions governing the martensitic transformation (MT) remains elusive. We systematically investigate the MT of Mg-Sc alloys using first-principles methods. The result of generalized solid-state nudged elastic band methods confirms that no energy barrier inhibits the MT. We show that the bcc structure of Mg26Sc6 is dynamical instability at 0 K caused by electron-phonon coupling and Fermi surface nesting. Particularly, the high-temperature stability of Mg26Sc6 is revealed for the first time using the temperature-dependent effective potential method. The softening of the acoustic mode at Γ-R corresponds to two neighboring (1 0 1) planes moving towards each other, and forms martensite phase. Our calculations provide the complete and atomic-level mechanism for the MT of Mg-Sc alloys and shed some light on the design of new LWSMAs.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80976457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Self-formation of a unique dual glassy-crystalline structure in binary W–Zr system was observed for a film with 28 at.% Zr prepared by magnetron co-sputtering. The film is composed of conical columnar domains of α-W(Zr) solid solution structure surrounded by featureless areas corresponding to a W–Zr metallic glass. The conical domains have their axes perpendicular to the film surface. Most of the domains have the apex at or close to the substrate surface, which corresponds to the point of primary nucleation. The surface ratio of glassy and crystalline phase (bases of the cones) is dependent on the film thickness. The dual structure is prepared in a very narrow window of the elemental composition. We suppose that the specific elemental composition and the diffusivity or mobility of sputtered adatoms are crucial for the self-formation of the dual structure.
{"title":"Self-Formation of Dual Glassy-Crystalline Structure in Magnetron Sputtered W–Zr Films","authors":"P. Zeman, S. Haviar, M. Červená","doi":"10.2139/ssrn.3721835","DOIUrl":"https://doi.org/10.2139/ssrn.3721835","url":null,"abstract":"Abstract Self-formation of a unique dual glassy-crystalline structure in binary W–Zr system was observed for a film with 28 at.% Zr prepared by magnetron co-sputtering. The film is composed of conical columnar domains of α-W(Zr) solid solution structure surrounded by featureless areas corresponding to a W–Zr metallic glass. The conical domains have their axes perpendicular to the film surface. Most of the domains have the apex at or close to the substrate surface, which corresponds to the point of primary nucleation. The surface ratio of glassy and crystalline phase (bases of the cones) is dependent on the film thickness. The dual structure is prepared in a very narrow window of the elemental composition. We suppose that the specific elemental composition and the diffusivity or mobility of sputtered adatoms are crucial for the self-formation of the dual structure.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78572521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Large columnar grains with epitaxial growth are commonly obtained in the additive manufacturing of metals, resulting in anisotropic mechanical properties and even hot-tearing cracks. Here, we demonstrate a new approach via remelting-introduced columnar-to-equiaxed transformation to promote the formation of fully-equiaxed microstructures in the additive manufacturing of Ni32Co30Cr10Fe10Al18 eutectic high-entropy alloy. Our present work displays promising isotropic mechanical properties with a superior combination of strength and ductility, compared to conventional as-cast and other as-printed eutectic high-entropy alloys. This novel finding could be applicable to the additive manufacturing of other eutectic systems for equiaxed microstructure control and performance optimization.
{"title":"Remelting Induced Fully-Equiaxed Microstructures with Anomalous Eutectics in the Additive Manufactured Ni 32Co 30Cr 10Fe 10Al 18 Eutectic High-Entropy Alloy","authors":"Kexuan Zhou, Junjie Li, Qingfeng Wu, Zhilin Zhang, Zhijun Wang, Jincheng Wang","doi":"10.2139/ssrn.3805157","DOIUrl":"https://doi.org/10.2139/ssrn.3805157","url":null,"abstract":"Large columnar grains with epitaxial growth are commonly obtained in the additive manufacturing of metals, resulting in anisotropic mechanical properties and even hot-tearing cracks. Here, we demonstrate a new approach via remelting-introduced columnar-to-equiaxed transformation to promote the formation of fully-equiaxed microstructures in the additive manufacturing of Ni32Co30Cr10Fe10Al18 eutectic high-entropy alloy. Our present work displays promising isotropic mechanical properties with a superior combination of strength and ductility, compared to conventional as-cast and other as-printed eutectic high-entropy alloys. This novel finding could be applicable to the additive manufacturing of other eutectic systems for equiaxed microstructure control and performance optimization.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76356095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liufei Huang, Yao Sun, N. Chen, Hengwei Luan, G. Le, Xue Liu, Yaqi Ji, Yiping Lu, P. Liaw, Xiaoshan Yang, Yuzhao Zhou, Jin-Feng Li
The negative effects of thermal cycles in the process of additive manufacture present a challenge for the control of microstructure so as to fabricate the products with improved properties compared to cast. In this work, AlCoCrFeNi2.1 eutectic high entropy alloy (EHEA) was prepared by laser metal deposition (LMD). Comparison with the cast samples, the LMD-fabricated EHEA showed significantly enhanced tensile strength (by 19.7%) and increased tensile ductility (by 56.4%). Such enhancement in mechanical properties owing to the refinement of the uniformly distributed eutectic-structure, which was composed of a ductile FCC(L12) phase and a strong BCC(B2) phase embedded with a high density of nano-precipitates. These nano-precipitates effectively pinned the dislocations, resulting strain hardening/dislocation accumulation capability. The present work provides a new strategy to utilize both the high cooling rates of LMD and the eutectic-structure characteristics for achieving homogeneous structures and superior mechanical properties to those prepared by traditional processing techniques.
{"title":"Simultaneously Enhanced Strength-Ductility of AlCoCrFeNi 2.1 Eutectic High-Entropy Alloy via Additive Manufacturing","authors":"Liufei Huang, Yao Sun, N. Chen, Hengwei Luan, G. Le, Xue Liu, Yaqi Ji, Yiping Lu, P. Liaw, Xiaoshan Yang, Yuzhao Zhou, Jin-Feng Li","doi":"10.2139/ssrn.3777625","DOIUrl":"https://doi.org/10.2139/ssrn.3777625","url":null,"abstract":"The negative effects of thermal cycles in the process of additive manufacture present a challenge for the control of microstructure so as to fabricate the products with improved properties compared to cast. In this work, AlCoCrFeNi2.1 eutectic high entropy alloy (EHEA) was prepared by laser metal deposition (LMD). Comparison with the cast samples, the LMD-fabricated EHEA showed significantly enhanced tensile strength (by 19.7%) and increased tensile ductility (by 56.4%). Such enhancement in mechanical properties owing to the refinement of the uniformly distributed eutectic-structure, which was composed of a ductile FCC(L12) phase and a strong BCC(B2) phase embedded with a high density of nano-precipitates. These nano-precipitates effectively pinned the dislocations, resulting strain hardening/dislocation accumulation capability. The present work provides a new strategy to utilize both the high cooling rates of LMD and the eutectic-structure characteristics for achieving homogeneous structures and superior mechanical properties to those prepared by traditional processing techniques.","PeriodicalId":7765,"journal":{"name":"AMI: Scripta Materialia","volume":"121 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72551351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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