On the occurrence of a eutectic-type structure in solidification of Al-Zr alloys

SCRIPTA MATERIALIA

卷:133

Article

Wang, F.¹  Eskin, D. G.¹  Khvan, A. V.²  Starodub, K. F.²  Lim, Jj. H.³  Burke, M. G.³  Connolley, T.⁴  Mi, J.⁵ 

[1] Bninel Univ London, Brunel Ctr Adv Solidificat Technol, Kingston Lane, Uxbridge UB8 3PH, Middx, England

[2] Natl Univ Sci & Technol M1SIS, Thermochem Mat SRC, Leninsky Prosp 4, Moscow 119049, Russia

[3] Univ Manchester, Mat Performance Ctr, Manchester M13 9PL, Lancs, England

[4] Diamond Light Source Ltd, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England

[5] Univ Hull, Sch Engn, Kingston Upon Hull HU6 7RX, N Humberside, England

关键词: Eutectic solidification;    Solidification microstructure;    Differential thermal analysis (DTA);    Electron diffraction;    Al-Zr;   

DOI  :  10.1016/j.scriptamat.2017.02.027

来源: Elsevier

【 摘 要 】

For the first time, experimental evidence is presented for the occurrence of a eutectic reaction in dilute Al-Zr alloys solidified at cooling rates from 0.5 to 5 K/s. Particles which formed at grain boundaries during solidification were confirmed by electron diffraction analysis to be the equilibrium tetragonal DO23Al3Zr phase. Differential thermal analysis showed a thermal arrest at 658-659 degrees C, i.e. below the melting point of pure Al, which indicated the presence of a eutectic reaction. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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