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analysis, the effect of Mn content on the constituents of Al-Mg-Si-Cu aluminium alloys containing 0.3%Fe (mass fraction) was studied. The results indicate that the constituents formed during cast of alloys... treatment, the constituents are crushed and distribute in continuous lines along rolling direction. However, types of the constituents vary no longer. Key words: Al-Mg-Si-Cu aluminium alloys; constituents......
of Materials Science and Engineering, Changzhou University, Changzhou 213164, China;)Abstract:The microstructures and properties of Al-Mg-Si-Cu alloys were investigated by differential scanning calorimetry...Cu含量对Al-Mg-Si-Cu合金微观组织和性能的影响王芝秀1, 2, 3,李 海2, 3,顾建华2, 3,宋仁国2, 3,郑子樵1(1. 中南大学 材料科学与工程学院,长沙 410083； 2. 常州大学 材料科学与工程学院,常州 213164； 3. 常州大学 常州市先进金属重点实验室,常州 213164)摘 要:采用DSC热分析,硬度,电导率,拉伸和晶间腐蚀等测试及透射电镜组织观察......
Al-Mg-Si-Cu合金时效状态对疲劳过程及断裂特征的影响黄昌军,刘春辉,陈江华,冯佳妮,桑 益,廖元飞,陈 刚(湖南大学 材料科学与工程学院,长沙 410082)摘 要:采用疲劳测试,拉伸试验,金相显微电镜,扫描电镜和透射电镜技术研究不同时效处理状态的Al-Mg- Si-Cu合金在循环载荷作用过程中力学性能的演变和疲劳断口特征.结果表明:过时效合金的疲劳寿命最长,峰值时效合金的疲劳寿命最短；欠时效和峰值时效合金的屈服强度在疲劳过程中出现下降,且欠时效合金表现得尤为显著,欠时效合金的伸长率随循环次数的增加而增加；过时效合金的强度在疲劳过程中得到提高,而伸长率在疲劳寿命后期出现大幅下降.疲劳裂纹在样品表面萌生后倾向于沿晶界增殖并形成裂纹源区,过时效合金在射线状裂纹增殖区与瞬断区之间还出现了沿晶扩展区.关键词:Al-Mg-Si-Cu合金；析出相；疲劳；力学性能；断......
Effects of magnesium content on phase constituents of Al-Mg-Si-Cu alloys LIU Hong(刘 宏)1, ZHAO Gang(赵 刚)2, LIU Chun-ming(刘春明)2, ZUO Liang(左 良)2 1. School of Mechanical Engineering, Shandong... dispersive spectrum(EDS), X-ray diffractometry(XRD) and metallographic analysis, the effects of variation of magnesium content on phase constituents of Al-Mg-Si-Cu alloys were investigated. The results......
on microstructures and properties of Al-Mg-Si-Cu alloys[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(12): 3348-3355. [5] LARSEN M H, WALMSLEY J C, LUNDER O, NISANCIOGLU K. Effect of excess silicon and small... C H J, BIRBILIS N. On the intergranular corrosion and hardness evolution of 6xxx series Al alloys as a function of Si:Mg ratio, Cu content and ageing condition[J]. Corrosion, 2017, 73: 1280-1295. [15......
文章编号:1004-0609(2010)08-1501-07 新型Al-Mg-Si-Cu合金的热变形行为及力学性能 李文意1, 2,杨伏良1, 2,马 政1, 2,党小荔1, 2,孟德超1, 2,张国鹏1, 2,尹德艳3 (1. 中南大学 材料科学与工程学院,长沙 410083； 2. 中南大学 有色金属材料科学与工程教育部重点实验室,长沙 410083； 3. 长沙新振升集团有限公司,长沙 410100) 摘 要:采用热模拟研究一种新型Al- Mg-Si-Cu合金的热变形行为,制定该合金的低温快速挤压工艺和在线热处理制度,利用电子万能实验机,光学显微镜,扫描电镜对合金的力学性能和组织进行分析.结果表明:新型Al- Mg-Si-Cu合金为正应变速率敏感材料；该合金的热压缩变形流变应力行为可用双曲正弦形式的本构方程来描述,也可用Zener......
Effect of Mg on microstructures and properties of Al-Mg-Si-Cu aluminium alloys for automotive body sheets LIU Hong(刘 宏)1, 2, SONG Wen-ju(宋文举)1, ZHAO Gang(赵 刚)1,LIU Chun-ming(刘春明)1, ZUO...′nan 250100, China) Abstract: The effects of variation of Mg content on microstructures, the tensile properties and the formability of Al-Mg-Si-Cu alloys for automotive body sheets were investigated......
控制在40%左右, 轧制道次4次, 轧至厚度3.6mm. 然后进行冷轧, 轧制道次3次, 成品厚度1.0mm. 表1 Al-Mg-Si-Cu基合金成分 Table 1 Chemical compositions of Al-Mg-Si-Cu based alloys (mass fraction, %) 板材热处理工艺为: 540℃, 30min 固溶...的质量损失速度 Table 2 Rate of mass loss of alloys (mg·h-1·cm-2) 微量元素Sr是作为变质剂加入合金的. 汪沛雨等[7]的研究认为Al-Si-Cu合金加入Sr进行变质, 其共晶Si由粗大板块状变为针条状或松树枝状, 晶粒度明显变小. Sr的加入可能使Al较易生核, 因而使共晶组织细化, 分配系数小, 浓度梯度大, 阻碍晶体成长......
ratio, sufficient formability, excellent corrosion resistance and good recyclability [1-4]. Heat-treatable Al- Mg-Si-Cu alloys belonging to 6xxx series alloys have gained extensive attention... on the mechanical property and microstructureof Al-Mg-Si-Cu alloy has been revealed by some researchers, there is still lack of systematic study about its effect on texture of Al-Mg-Si-Cu alloys under tensile......
thermomechanical processing, microstructure, texture and mechanical properties in the Al-Mg-Si-Cu alloys. 2 Experimental The chemical composition of the alloy was Al-0.8Mg-0.9Si-0.5Cu-0.2Fe-0.1Mn (mass... and Engineering A, 2000, 293(1-2): 19-29. [31] LIU Y S, KANG S B, KO H S. Texture and plastic anisotropy of Al-Mg-0.3Cu-1.0Zn alloys [J]. Scripta Materialia, 1997, 37(4): 411-417. 热加工过程对Al-Mg-Si-Cu合金组织......
