Effect of Equal-Channel Angular Pressing and Subsequent Aging on the Structure and Mechanical Properties of Al–Mg2Si Alloys with Transition Metal Additions

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING

Russian Metallurgy (Metally) Pub Date : 2023-12-05 DOI:10.1134/S0036029523070091

O. V. Rybal’chenko, N. S. Martynenko, G. V. Rybal’chenko, N. Yu. Tabachkova, E. A. Luk’yanova, D. R. Temralieva, I. E. Tarytina, M. E. Prutskov, A. I. Ogarkov, A. G. Raab, N. R. Bochvar, S. V. Dobatkin

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Abstract

The effect of equal-channel angular pressing (ECAP) at 150°C and subsequent aging on the structure and strength characteristics of Al–Mg₂Si alloys with scandium and joint (Sc + Zr) and (Sc + Hf) additions is studied. Hardness and electrical resistivity curves demonstrate the decomposition of the supersaturated solid solution in the alloys with (Sc + Zr) and (Sc + Hf) additions is found to be same, and the optimum aging conditions of the alloys are obtained. The microstructure of the alloys and precipitation of secondary phases are studied in detail using scanning and transmission electron microscopy (SEM and TEM, respectively). The alloys subjected to ECAP and aging demonstrate an increase in the strength and the plasticity due to compensation of aging processes by recovery processes related to restructuring a dislocation structure.

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等径角挤压及后续时效对添加过渡金属Al-Mg2Si合金组织和力学性能的影响

研究了150℃等径角挤压(ECAP)和随后的时效对添加钪和(Sc + Zr)和(Sc + Hf)的Al-Mg2Si合金组织和强度特性的影响。硬度曲线和电阻率曲线表明，添加(Sc + Zr)和(Sc + Hf)的合金中过饱和固溶体的分解是相同的，得到了合金的最佳时效条件。利用扫描电镜(SEM)和透射电镜(TEM)对合金的显微组织和二次相的析出进行了详细的研究。经过ECAP和时效处理的合金表现出强度和塑性的提高，这是由于与位错结构重组相关的恢复过程补偿了时效过程。

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来源期刊

Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

0.70

自引率

25.00%

发文量

140

期刊介绍： Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.

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