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Improving Corrosion Resistance of Friction Stir Welding Joint of 7075 Aluminum Alloy by Micro-arc OxidationYue Yang,Leilei ZhouKey Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology摘 要:An attempt has been made to improve the corrosion resistance of friction stir welded joints of 7075 aluminum alloys......
电磁场频率对电磁铸造7075铝合金微观组织的影响 张北江1,班春燕1,张勤1,崔建忠1,路贵民1 (1.东北大学材料电磁过程研究教育部重点实验室,沈阳,1100004) 摘要:观察了电磁场频率对电磁铸造7075铝合金圆锭(直径为200 mm)微观组织的影响;在10-100 Hz范围内采用不同的电磁场频率通过电磁铸造工艺制得7075铝合金铸锭,分析其微观组织及合金元素分布情况.结果表明,电磁场频率的改变可显著影响熔体的凝固组织.频率为30 Hz时可最有效地抑制宏观偏析,改善铸锭的表面质量;15 Hz时能够更有效地细化晶粒. 关键词:电磁铸造; 电磁场频率; 微观组织; 偏析; 铝合金; [全文内容正在添加中] ......
Microstructure evolution and thixoforming behavior of 7075 aluminum alloy in the semi-solid state prepared by RAP methodJin-long Fu1,Kai-kun Wang1,Xiao-wei Li11. School of Materials Science...-solid 7075 aluminum alloy produced via the recrystallization and partial remelting(RAP) process were investigated. Samples of 7075 aluminum alloy were subjected to cold extrusion, and semi-solid......
Structural and mechanical properties of 7075 alloy strips fabricated by roll-casting in a static magnetic fieldXin Su1,Guang-ming Xu11. Key Laboratory of Ministry of Education for Electromagnetic Processing of Materials,Northeastern University摘 要:The influences of a 0.2 T static magnetic field on the microstructure of 7075 aluminum alloys sheets......
parameter; error analysis; 7075 aluminum alloy; forming limit diagram Foundation item: Project(51775481) supported by the National Natural Science Foundation of China; Project (ZD2017078) supported...法求解的最优断裂参数,应用Lou-Huh 2013准则绘制7075-T6高强铝板成形极限图,并采用半球形刚模胀形试验进行验证.验证结果表明:积分式和解析式方程组法预测7075-T6高强铝板破裂失稳偏于安全,这与参数求解时断裂起始点的选取偏于安全有关. 关键词:韧性断裂准则；断裂参数；误差分析；7075铝合金；成形极限图 文章编号:1004-0609(2020)-04-0763-12 ......
7075铝合金缸体的失效分析姜伟,段安婧三一重工股份有限公司摘 要:对在工作中发生断裂的7075铝合金缸体进行了化学成分分析,室温拉伸试验和断口形貌分析,以找到其失效的原因,给出相应的改进措施.结果表明:镁元素含量低于标准导致合金力学性能降低是该铝合金缸体失效的主要原因;阳极氧化膜上的微孔在循环应力作用下沿着机加工痕迹扩展形成疲劳源;随着应力循环的加剧,裂纹快速扩展,最终使缸体发生疲劳断裂.关键词:7075铝合金;断口形貌;失效分析;......
Microstructure and mechanical properties of low frequency electromagnetic casting 7075 aluminum alloyGaosong WANG , Zhihao ZHAO, Jianzhong CUI and Qiang GUO Key Laboratory of Electromagnetic... electromagnetic casting (LFEC) 7075 aluminum alloys and investigates the effect of heat treatment process on its mechanical properties via the mechanical properties test, X-ray diffraction and transmission......
时效和回归处理对7075铝合金力学及腐蚀性能的影响 刘培英1,朱国伟1,李荻1,郭宝兰1,刘继华1 (1.北京航空航天大学材料学院,北京,100083) 摘要:用维氏硬度计和慢应变速率拉(SSRT)技术研究了7075铝合金以不同制度时效和回归处理后的强度和应力腐蚀断裂(SCC)行为.结果表明:7075铝合金的强度,硬度和SCC敏感性与时效温度和时间密切相关.对于单级时效,峰时效7075-T6铝合金的强度最大,但其SCC敏感性也最大.过时效T7351及A180能显著提高合金的耐SCC性,SSRT拉伸断裂强度却下降约20%.多级时效,回归再时效(RRA)不仅能降低7075铝合金的应力腐蚀敏感性,而且能保持较高的强度. 关键词:回归再时效(RRA); 沉淀硬化; 应力腐蚀断裂(SCC); 慢应变速率拉伸(SSRT); [全文内容正在添加中] ......
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Influence of the Accumulative Roll Bonding Process Severity on the Microstructure and Superplastic Behaviour of 7075 Al AlloyP.Hidalgo-Manrique,A.Orozco-Caballero,C.M.Cepeda-Jiménez,O.A.Ruano,F.Carre?oDepartment of Physical Metallurgy, CENIM, CSIC摘 要:The 7075 Al alloy was processed by accumulative roll bonding(ARB) at 350 °C using 2:1, 3:1 and 4......
