非等温退火对剧烈变形2024铝合金显微组织和力学性能的影响（英文）

发布时间：2018-05-28 19:31

本文选题：AA合金 + 剧烈塑性变形　；参考：《Transactions of Nonferrous Metals Society of China》2017年01期

【摘要】：研究剧烈塑性变形和非等温退火AA2024合金的显微组织和力学性能。对剧烈塑性变形的AA2024合金进行非等温退火,研究回复和析出之间的关系。差示扫描量热法、硬度和冲剪试验结果表明,经过非等温退火处理,静态回复和GBP区/Cu-Mg团簇的溶解同时存在。扫描电子显微镜和背散射电子衍射结果表明,AA2024合金非等温退火至250°C促进了无沉淀区和粒子激发形核。通过10°C/min加热至250°C,由于S/S′相的存在,合金的抗剪强度和硬度达到最大。差示扫描量热法、力学性能和光学显微镜结果表明,加热至380°C时,再结晶和S/S′相的溶解共同存在。
[Abstract]:The microstructure and mechanical properties of AA2024 alloy subjected to severe plastic deformation and non isothermal annealing were studied. The relationship between recovery and precipitation of AA2024 alloy subjected to severe plastic deformation was studied by non isothermal annealing. The results of differential scanning calorimetry, hardness and impact shear tests show that after non-isothermal annealing, the static recovery and the dissolution of GBP region / Cu-Mg cluster exist simultaneously. The results of scanning electron microscopy (SEM) and backscatter electron diffraction (XRD) show that the non-isothermal annealing to 250 掳C promotes the precipitation-free zone and particle excited nucleation of the alloy. When heated to 250 掳C by 10 掳C/min, the shear strength and hardness of the alloy reached the maximum due to the presence of S / S 'phase. The results of differential scanning calorimetry (DSC), mechanical properties and optical microscopy show that recrystallization and the dissolution of S / S 'phase co-exist when heated to 380 掳C.
【作者单位】： Department
【基金】：research board of Sharif University of Technology for the financial support and the provision of the research facilities used in this work
【分类号】：TG146.21;TG166.3

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