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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of the eutectic Al-(Ce,La) phase morphology on microstructure, mechanical properties, electrical conductivity and heat resistance of Al-4.5(Ce,La) alloy after SPD and subsequent annealing
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Effect of the eutectic Al-(Ce,La) phase morphology on microstructure, mechanical properties, electrical conductivity and heat resistance of Al-4.5(Ce,La) alloy after SPD and subsequent annealing

机译：共晶Al（CE，LA）相形态对SPD和随后退火后Al-4.5（Ce，La）合金的微观结构，机械性能，电导率和耐热性的影响

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摘要

This paper reports on a crucial role of the morphology of intermetallic Al11RE3 phase and Al/Al11RE3 interphase (where RE - Rare Earth) surface area, before plastic deformation, on the electrical and mechanical properties and the thermostability of aluminium alloys. Cast Al-4.5 (Ce + La) alloy samples, processed with and without spheroidization treatment (ST), were subjected to high pressure torsion (HPT) at room temperature (RT) followed by annealing at 230 degrees C, 280 degrees C and 400 degrees C for 1 h. It is demonstrated, that the changes of initial alloy structure (particles shape/size) and the decrease of interphase surface area affect the distribution of intermetallic particles after HPT, the distribution of ultrafine grains and the dislocation density, as well as the formation of a supersaturated solid solution of Ce and La in aluminium. The optimal combination of strength (ultimate tensile stress (sigma(UTS)) 430 MPa) and conductivity (55.9% International Annealed Copper Standard, IACS) was obtained after ST, HPT and an annealing temperature of 230 degrees C. (C) 2019 Elsevier B.V. All rights reserved.
机译：本文报告了金属间组合Al11Re3相和Al / Al11re3相互作用（其中Re-稀土）表面积，在塑性变形之前的形态和铝合金的热稳定性以及铝合金的热稳定性的关键作用。铸造Al-4.5（Ce + La）合金样品，在室内温度（ST）的情况下，在室温（RT）下进行高压扭转（HPT），然后在230℃，280℃和400时退火患者1小时。据证明，初始合金结构（颗粒形状/尺寸）的变化和间面表面积的降低影响HTP后金属间粒子的分布，超细颗粒的分布和位错密度，以及形成铝中Ce和La的超饱和固溶体。在ST，HPT和230摄氏度的退火温度下，获得了强度的最佳强度（σ（UTS））430MPa）和电导率（55.9％国际退火铜标准，IACS）。（c）2019年Elsevier BV保留所有权利。

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