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A new type face-centered cubic zirconium phase in pure zirconium

Journal of Materials Science & Technology 2021年第22期81卷 236-239页

作者： Fusen Yuan Geping Li Fuzhou Han Yingdong Zhang Ali Muhammad Wenbin Guo Jie Ren Chengze Liu Hengfei Gu Gaihuan Yuan Shi-changxu Innovation Center For Advanced Materials Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang110016PR China School of Materials Science and Engineering University of Science and Technology of China96 JinZhai RoadBaohe DistrictHefeiAnhui230026PR China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing100049PR China State Nuclear Bao Ti Zirconium Industry Company Baoji721013PR China

So far,only two orientation relationships(OR)between hexagonal close-packed(HCP)(αphase)and facecentered cubic(fcc)structures in zirconium and titanium alloys have been *** a new type fcc phase(named γ phase)with OR:_(α)‖_(γ) and{0001}_(α)‖{002}_(γ) was observed for the first time in annealed pure zirconium by means of transmission electron microscopy(TEM)*** α→γ phase transformation can be accomplished via expansion along[1■00]direction and slip of Shockley partial dislocation with 1/3[1■00]on(0001)basal planes.

关键词： fcc phase Orientation relationship phase transformation

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Effect of Sn on synthesis of nanocrystalline Ti-based alloy with fcc structure

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Transactions of Nonferrous Metals Society of China 2020年第8期30卷 2119-2131页

作者： C.AGUILAR E.PIO A.MEDINA C.PARRA R.MANGALARAJA P.MARTIN I.ALFONSO K.TELLO Departamento de Ingeniería Metalúrgica y de Materiales Departamento de Física(+)Universidad Técnica Federico Santa MaríaValparaísoChile Instituto de Investigación en Metalurgia y Materiales Universidad Michoacana de San Nicolás de HidalgoMoreliaMéxico Laboratorio de Cerámicos Avanzados y Nanotecnologia Departamento de Ingeniería de MaterialesUniversidad de ConcepciónConcepciónChile Instituto de Investigaciones en Materiales Universidad Nacional Autónoma de MéxicoCampus Morelia UNAMMoreliaMéxico

The effect of the amount of Sn on the formation of fcc phase in Ti-13 Ta-x Sn(x=3,6,9 and 12,at.%)alloys was *** alloys were synthesized by mechanical alloying using a planetary mill,jar and balls of stabilized *** Rietveld refinement,it was found that the obtained fcc phase has crystallite size smaller than 10 nm and microstrain larger than *** conditions are required to form an fcc phase in Ti-based *** all samples,the microstructure of the fcc phase consists of equiaxial crystallites with sizes smaller than 10 *** largest presence of fcc phase in the studied Ti alloy was found with 6 at.%Sn,because this alloy exhibits the largest microstrain(1.5×10-2)and crystallite size of 6.5 *** data reveal that a solid solution and an amorphous phase were formed during *** necessary conditions to promote the formation of solid solution and amorphous phases were determined using thermodynamic *** the amount of Sn increases,the energy required to form an amorphous phase varies from approximately 10 to approximately-5 k J/mol for 3 and 12 at.%Sn,*** thermodynamic calculations are in agreement with XRD patterns analysis and HRTEM results.

关键词： Ti-based alloy phase transformation fcc phase Rietveld analysis mechanical alloying

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