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J. Cent. South Univ. Technol. (2008) 15: 153-158 DOI: 10.1007/s11771-008-0030-y Influence of quench transfer time on microstructure and mechanical properties of 7055 aluminum alloy YOU Jiang-hai... properties of 7055 aluminum alloy with and without zirconium was investigated by tensile properties test, optical microscopy, scanning electron microscopy and transmission electron microscopy. For the Zr......
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7085铝合金的淬火敏感性肖靖1,2,易幼平1,2,崔金栋1,2,黄始全1,21. 中南大学高性能复杂制造国家重点实验室2. 中南大学机电工程学院摘 要:采用分级淬火法测定了7085铝合金的TTT和TTP曲线,并结合透射电镜对其淬火敏感性进行了研究.结果表明,在等温保温过程中7085铝合金淬火态电导率升高,时效态硬度下降,在中间温度段电导率及硬度变化较快;TTT和TTP曲线的鼻尖温度约为320℃,淬火敏感区间为250~370℃;等温保温过程中,过饱和固溶体分解析出平衡相η,在320℃附近析出速率达到最大,随着等温保温时间的延长,η相聚集并长大,时效后出现大量无沉淀析出区域,导致性能显著下降;在淬火敏感区间,较高的相变驱动力和较大的扩散速率是η相快速析出长大的主要原因.关键词:7085铝合......
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Effects of pitting corrosion on fatigue life of aluminum alloy Y12CZ based on initial discontinuity state YU Da-zhao(郁大照) 1, CHEN Yue-liang(陈跃良)2, HU Jia-lin(胡家林)1, YANG Mao-sheng(杨茂胜)1 1. Naval... fatigue life of aluminum alloy LY12CZ. A life prediction was carried out using constant and variable amplitude loading for various pitting corrosion levels, and the prediction agreed reasonably......
) melting alloy of aluminum-silicon and calcium (3%, mass fraction) in furnace at 850 ℃; 2) adding titanium hydride (45 μm; 1.5%, mass fraction) to the molten body at 680 ℃ and stirring at a speed of 2 000 r... the foams, two different metals and one kind of powder were employed: 99.9% high purity binary eutectic Al-Si alloy (Al-12.6Si from Fushun aluminum manufacture, China), high purity metal Ca (from Sichuan......
Microstructure and mechanical properties of friction stir welded thin sheets of 2024-T4 aluminum alloy LI Lian(李 炼)1, TONG Jian-hua(佟建华)1, WAN Fa-rong(万发荣)1, LONG Yi(龙 毅)2 1. Department... welded 1 mm thick sheets of 2024-T4 aluminum alloy were studied. It was found that the thinner the 2024 aluminum alloy, the larger the FSW technological parameters field. The grains size of weld nugget......
Preparation of anodic films on 2024 aluminum alloy in boric acid-containing mixed electrolyte MA Song-jiang(马淞江)1, LUO Peng(罗 鹏)2, ZHOU Hai-hui(周海晖)2, FU Chao-peng(付超鹏)2, KUANG Ya-fei(旷亚非)2 1...; Abstract: The anodizing oxidation process on 2024 aluminum alloy was researched in the mixed electrolyte with the composition of 30 g/L boric acid, 2 g/L......
Effects of deformation temperature and rate on compressive deformation behaviour of Y112 die cast aluminum alloy in semi-solid state YANG Ming-bo(杨明波), HU Hong-jun(胡红军), TANG Li-wen(唐丽文), DAI Bing... deformation behaviour of Y112 die casting aluminum alloy with nondendritic structure obtained under the semi-solid isothermal treatment condition of 570 ℃ and 120 min, was investigated by means......
has the smallest mass loss and the lowest friction coefficient of 0.17-0.19. Key words: microarc oxidation; magnesium; alloying element; friction; wear; aluminum alloy 1 Introduction Aluminum alloys.... The different magnesium contents in aluminum alloy result in the thickness changes of natural oxide coating, which has a principal effect on the microarc oxidation voltage and ultimate nature......
