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微米级第二相 中图分类号:TG146.2;TG113.2 文献标志码:A Effect of microstructures on fatigue crack propagation in 2E12 aluminum alloy YAN Liang1, 2, DU Feng-shan1, DAI Sheng-long2, YANG... between microstructure and fatigue crack propagation behaviors of 2E12 aluminum alloys was investigated at room temperature in air. The microstructures and fatigue fracture surfaces of the alloy were......
Effect of pre-stretching on microstructure of aged 2524 aluminium alloy QUAN Li-wei1, 2, ZHAO Gang1, Sam GAO2, Barry C. MUDDLE2 1. School of Materials and Metallurgy, Northeastern University...-stretching following solution treatment on the hardness and microstructures of aged 2524 aluminium alloy at 170 °C were studied. Ageing hardness values under different pre-stretching conditions were......
in the Boeing 777 aircraft[1-4]. 2E12 aluminum alloy is the newest anti-fatigue damage aluminum alloy of China, which is developed based on 2524 aluminum alloy. Pre-strain is an important method to improve... Effect of pre-strain on fatigue crack growth of 2E12 aluminum alloy YI Dan-qing(易丹青)1, 2, YANG Sheng(杨胜)1, 2, DENG Bin(邓斌)1, ZHOU Ming-zhe(周明哲)1 1. School of Materials Science and Engineering......
of artificial ageing on fatigue behaviour of 2524 aluminum alloy LIU Zhi-yi1, 2, ZHOU Jie1, 2, LIU Yan-bin1, 2, LI Yun-tao1, 2, DUAN Shui-liang1, 2, BAI Song1, 2, DENG Cai-zhi1, 2 The Key... South University, Changsha 410083, China) Abstract: The effects of artificial ageing on the fatigue crack propagation and room mechanical properties of 2524 aluminum alloy were investigated......
, this alloy was firstly used in Boeing 777 aircraft and recently applied in A380 large-type passenger plane [3-5]. The research on 2E12 aluminum alloy, exploited on the basis of 2524 alloy, is just...J. Cent. South Univ. Technol. (2010) 17: 697-702 DOI: 10.1007/s11771-010-0542-0 Effect of age condition on fatigue properties of 2E12 aluminum alloy YAN Liang(闫亮)1, 2, DU Feng-shan(杜凤山)1......
Trans. Nonferrous Met. Soc. China 24(2014) 2408-2413 Effect of electromagnetic field on microstructure and macrosegregation of flat ingot of 2524 aluminium alloy Yu-bo ZUO, Jian-zhong CUI, Dan MOU... the flat ingot of 2524 alloy and the effect of electromagnetic field on the microstructure and macrosegregation of this alloy was systematically studied. The results show that the flat ingot prepared......
2524铝合金热稳定性研究 周杰1,刘延斌1,侯延辉1,刘志义1,邓才智1 (1.中南大学材料科学与工程学院,湖南,长沙,410083) 摘要:通过力学拉伸,DSC热分析和透射电镜观察,研究了150℃不同时间热暴露对2524合金组织与性能的影响.结果表明:经自然时效(T351)和高温短时人工时效处理(170℃×30min)的合金在热暴露过程中,合金强度随热暴露时间的延长先增加后下降,而伸长率逐渐下降.热暴露500h后,高温短时人工时效处理的试样力学性能退化较快.2524合金高温短时人工时效获得的较大尺寸的原子偏聚(GPB)区比自然时效中的GPB区较难回溶,因此形成的S''相尺寸较大,更易粗化.150℃热暴露合金力学性能衰退的主要原因可归结为合金基体主要强化相S''(Al2CuMg)相粗化以及晶界无析出带(PFZ)的宽化. 关键词:2524合金; 热暴露; GPB区; 力学性能......
腐蚀环境下2E12航空铝合金疲劳裂纹扩展行为研究 易丹青1,杨胜1,钟利2,杨守杰3 (1.中南大学,材料科学与工程学院,长沙,410083;2.东北轻合金有限公司,哈尔滨,115001;3.北京航空材料研究院,北京,100095) 摘要:采用SEM,TEM及疲劳性能测试等分析测试手段,系统地研究了2E12 铝合金在室温空气,潮湿气体及盐雾环境下的疲劳裂纹扩展速率.结果发现2E12合金具有良好的疲劳性能,疲劳裂纹扩展速率优于国外的2524铝合金.利用修正的Paris公式分析腐蚀介质对合金的疲劳裂纹扩展性能影响轻重程度依次为:室温空气<潮湿气体<盐雾环境.不同环境条件下合金的疲劳裂纹形貌均表现微观裂纹扩展的晶界小平面,宏观裂纹扩展的疲劳条纹以及剪切撕裂的微观结构.在腐蚀环境下,宏观裂纹扩展表现出更多的脆性裂纹扩展特征,氢脆导致塑性区脆化及腐蚀诱导的阳极溶解是导致裂纹扩展性能降低的原因......
Trans. Nonferrous Met. Soc. China 25(2015) 3048-3055 Constitutive modeling and springback simulation for 2524 aluminum alloy in creep age forming You-liang YANG1,2, Li-hua ZHAN1,2, Jie LI2,3 1. State..., which can be more consistent with experimental results. Key words: 2524 aluminum alloy; creep age forming; constitutive modeling; springback simulation; stress state 1 Introduction In recent years......
缩试验.当压缩实验完成后,将样品迅速水冷到室温以保留热变形时的组织. 表1 不同组织特征2E12合金的制备方法 Table 1 Preparation methods for 2E12 alloy with different microstructures 为分析合金的变形机理,对部分试样进行表面抛光处理,随后在FEI Sirion 200型场发射扫描电镜(SEM)上观..., 杨守杰. 微观组织对2E12铝合金疲劳裂纹扩展的影响[J]. 中国有色金属学报, 2010, 20(7): 1275-1281. YAN Liang, DU Feng-shan, DAI Sheng-long, YANG Shou-jie. Effect of microstructures on fatigue crack propagation in 2E12 aluminum alloy[J......