Study the microstructure of three and four component phases in Al-Ni-Fe-La alloys

Handle URI:
http://hdl.handle.net/10754/625024
Title:
Study the microstructure of three and four component phases in Al-Ni-Fe-La alloys
Authors:
Kolobylina, Natalia; Vasiliev, Alexander; Lopatin, Sergey; Presniakov, Mikhail; Bakhteeva, Natalia; Ivanova, Anna; Todorova, Elena
Abstract:
Aluminium alloys play a key role in modern engineering since they are the most used non-ferrous material. They have been widely used in automotive, aerospace, and construction engineering due to their good corrosion resistance, superior mechanical properties along with good machinability, weldability, and relatively low cost. The progress in practical application has been determined by intensive research and development works on the Al alloys. A new class of Al–REM–TM aluminum alloys (REM indicates rare earth metal and TM is transition metal) was revealed in the end of the last century. These alloys differ from conventional ones by their extraordinary ability to form metal glasses and nanoscale composites in a wide range of compositions. Having low density, these alloys possess unique mechanical characteristics and corrosion resistance. Two as received alloys, namely Al85Ni9Fe2La4 and Al85Ni7Fe4La4 were obtained in the form of ingots from melts of corresponding compositions upon cooling in air were studied by scanning/transmission electron microscopy (STEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction (XRD). The microstructural analyses were performed in a aberration corrected TITAN 80-300 TEM/STEM (FEI, USA) attached with EDX spectrometer with ultrathin window (EDAX, USA). The specimens for transmission electron microscopy (TEM) were prepared by an electrochemical or ion etching. It was found that the received alloys exhibits along with fcc Al and Al4La (Al11La3) particles, these alloys contain a ternary phase Al3Ni1 Fe isostructural to the Al3Ni phase and a quaternary phase Al8Fe2 NiLa isostructural to the Al8Fe2Eu phase and monoclinic phase Al9(Fe,Ni)2 isostructural to the Al9Co2. The study by HRSTEM together with a new atomic resolution energy dispersive X-ray microanalysis method demonstrated that Fe and Ni atoms substituted one another in the Al8Fe2–NiLa quaternary compound. Besides, several types of defects were determined: first ones have a form of a δ -layers and they are Al3.2Fe1–Ni ternary compound with a Al3.2Fe structure type. Second ones were point defects, which are La vacancies. The experimental part of this work was partially done on the equipment of the Resource Center of Probe and Electron Microscopy (Kurchatov Complex of NBICS-Technologies, NRC “Kurchatov Institute”)
KAUST Department:
Imaging and Characterization Core Lab
Citation:
Kolobylina N, Vasiliev A, Lopatin S, Presniakov M, Bakhteeva N, et al. (2016) Study the microstructure of three and four component phases in Al-Ni-Fe-La alloys. European Microscopy Congress 2016: Proceedings: 374–375. Available: http://dx.doi.org/10.1002/9783527808465.emc2016.6866.
Publisher:
Wiley-Blackwell
Journal:
European Microscopy Congress 2016: Proceedings
Issue Date:
21-Dec-2016
DOI:
10.1002/9783527808465.emc2016.6866
Type:
Poster
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/9783527808465.EMC2016.6866/abstract
Appears in Collections:
Posters; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorKolobylina, Nataliaen
dc.contributor.authorVasiliev, Alexanderen
dc.contributor.authorLopatin, Sergeyen
dc.contributor.authorPresniakov, Mikhailen
dc.contributor.authorBakhteeva, Nataliaen
dc.contributor.authorIvanova, Annaen
dc.contributor.authorTodorova, Elenaen
dc.date.accessioned2017-06-14T12:17:34Z-
dc.date.available2017-06-14T12:17:34Z-
dc.date.issued2016-12-21en
dc.identifier.citationKolobylina N, Vasiliev A, Lopatin S, Presniakov M, Bakhteeva N, et al. (2016) Study the microstructure of three and four component phases in Al-Ni-Fe-La alloys. European Microscopy Congress 2016: Proceedings: 374–375. Available: http://dx.doi.org/10.1002/9783527808465.emc2016.6866.en
dc.identifier.doi10.1002/9783527808465.emc2016.6866en
dc.identifier.urihttp://hdl.handle.net/10754/625024-
dc.description.abstractAluminium alloys play a key role in modern engineering since they are the most used non-ferrous material. They have been widely used in automotive, aerospace, and construction engineering due to their good corrosion resistance, superior mechanical properties along with good machinability, weldability, and relatively low cost. The progress in practical application has been determined by intensive research and development works on the Al alloys. A new class of Al–REM–TM aluminum alloys (REM indicates rare earth metal and TM is transition metal) was revealed in the end of the last century. These alloys differ from conventional ones by their extraordinary ability to form metal glasses and nanoscale composites in a wide range of compositions. Having low density, these alloys possess unique mechanical characteristics and corrosion resistance. Two as received alloys, namely Al85Ni9Fe2La4 and Al85Ni7Fe4La4 were obtained in the form of ingots from melts of corresponding compositions upon cooling in air were studied by scanning/transmission electron microscopy (STEM), energy dispersive X-ray (EDX) microanalysis and X-ray diffraction (XRD). The microstructural analyses were performed in a aberration corrected TITAN 80-300 TEM/STEM (FEI, USA) attached with EDX spectrometer with ultrathin window (EDAX, USA). The specimens for transmission electron microscopy (TEM) were prepared by an electrochemical or ion etching. It was found that the received alloys exhibits along with fcc Al and Al4La (Al11La3) particles, these alloys contain a ternary phase Al3Ni1 Fe isostructural to the Al3Ni phase and a quaternary phase Al8Fe2 NiLa isostructural to the Al8Fe2Eu phase and monoclinic phase Al9(Fe,Ni)2 isostructural to the Al9Co2. The study by HRSTEM together with a new atomic resolution energy dispersive X-ray microanalysis method demonstrated that Fe and Ni atoms substituted one another in the Al8Fe2–NiLa quaternary compound. Besides, several types of defects were determined: first ones have a form of a δ -layers and they are Al3.2Fe1–Ni ternary compound with a Al3.2Fe structure type. Second ones were point defects, which are La vacancies. The experimental part of this work was partially done on the equipment of the Resource Center of Probe and Electron Microscopy (Kurchatov Complex of NBICS-Technologies, NRC “Kurchatov Institute”)en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/9783527808465.EMC2016.6866/abstracten
dc.subjectTransmission electron microscopy (TEM)en
dc.subjectscanning transmission electron microscopy (STEM)en
dc.subjectincluding high-resolution STEM (HRSTEM)en
dc.subjectenergy dispersive X-ray microanalysisen
dc.subjectelectron diffraction (ED)en
dc.subjectX-ray diffraction (XRD)en
dc.subjectthe microstructure and phaseen
dc.titleStudy the microstructure of three and four component phases in Al-Ni-Fe-La alloysen
dc.typePosteren
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalEuropean Microscopy Congress 2016: Proceedingsen
dc.contributor.institutionNRC Kurchatov Institute; Moscow Russieen
dc.contributor.institutionInstitute of Metallurgy and Material Science; Moscow Russieen
dc.contributor.institutionShubnikov Institute of Crystallography; Moscow Russieen
kaust.authorLopatin, Sergeyen
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