微量锆、镧对Al-Zn-Mg-Cu合金组织和性能的影响
Effects of Trace Zr and La on Microstructure and Properties of Al-Zn-Mg-Cu Alloy
摘 要
分别制备了未添加和同时添加0.1%（质量分数，下同）锆和0.2%镧的铸态Al-Zn-Mg-Cu合金，然后进行了均匀化、固溶和时效处理，研究了锆、镧的添加对该合金显微组织和力学性能的影响。结果表明：添加0.1%锆和0.2%镧后，该合金的形核率增加，组织分布更加均匀，晶粒得到了细化；其铸态硬度、抗拉强度、伸长率分别比未添加锆、镧的提高了13.60%，25.00%，21.88%；断裂方式由未添加锆、镧合金的沿晶断裂转变为韧窝型穿晶断裂，合金的韧性得到了提高。
锆
镧
显微组织
硬度
抗拉强度
Al-Zn-Mg-Cu alloy
Zr
La
microstructure
hardness
tensile strength
Abstract
Al-Zn-Mg-Cu alloys without and with the addition of 0.1wt% Zr and 0.2wt% La were prepared, respectively, and then were subjected to homogenizing, solution, and aging treatment. The effects of Zr and La addition on the microstructure and mechanical properties of Al-Zn-Mg-Cu alloys were investigated. The results show that with the addition of 0.1wt% Zr and 0.2wt% La, the nucleation rate of the alloy increased, the microstructure distribution was more uniform and the grains were refined; the as-cast hardness, tensile strength and elongation increased by 13.60%, 25.00%, 21.88% comparing to those of without Zr and La; the fracture mode changed from the intergranular fracture of the alloy without Zr and La to the dimple transgranular fracture, indicating the improvement of the alloy toughness.
中图分类号 TG146.2 DOI 10.11973/jxgccl201702022
所属栏目 材料性能及应用
基金项目 国家自然科学基金资助项目（51561029）
收稿日期 2015/7/15
修改稿日期 2016/10/15
网络出版日期
作者单位点击查看
备注金辉(1990-),男,重庆人,硕士研究生。
引用该论文: JIN Hui,LI Xin-mei. Effects of Trace Zr and La on Microstructure and Properties of Al-Zn-Mg-Cu Alloy[J]. Materials for mechancial engineering, 2017, 41(2): 102～105
金辉,李新梅. 微量锆、镧对Al-Zn-Mg-Cu合金组织和性能的影响[J]. 机械工程材料, 2017, 41(2): 102～105
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】STALEY J T, LIU J, HUNT JR W H. Aluminum alloys for aerostructures[J]. Advanced Materials and Process, 1997, 152(4):17-20.
【2】HEINZ A, HASZLER A, KEIDEL C, et al. Recent development in aluminium alloys for aerospace applications[J]. Materials Science and Engineering A, 2000, 280(1):102-107.
【3】王艺淋,潘清林,韦莉莉,等. 高强7050-T7451铝合金厚板的疲劳断口特征[J]. 机械工程材料, 2013, 37(6):26-30.
【4】刘文辉, 张新民, 李惠杰, 等. 固溶处理对7A55铝合金断裂韧性的影响[J]. 中南大学学报(自然科学版), 2007, 38(1):41-45.
【5】魏群义,彭晓东,谢卫东,等. 超高强度铝合金的应力腐蚀开裂[J]. 机械工程材料, 2003, 27(6):8-10.
【6】REDA Y, ABDEL-KARIM R, ELMAHALLAWI I. Improvements in mechanical and stress corrosion cracking properties in Al-alloy 7075 via retrogression and reaging[J]. Materials Science and Engineering A, 2008, 485(1):468-475.
【7】袁武华,张传阳.稀土元素含量对铝合金显微组织和性能的影响[J]. 机械工程材料, 2014, 38(11):54-59.
【8】蒋建辉,郑子樵,唐娟,等. 单级时效7056铝合金的显微组织与性能[J]. 机械工程材料, 2013, 37(4):69-74.
【9】WANG S H, MENG L G, YANG S J, et al. Microstructure of Al-Zn-Mg-Cu-Zr-0.5Er alloy under as-cast and homogenization conditions[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(7):1449-1454.
【10】XU G F, MOU S Z, YANG J J, et al. Effect of trace rare earth element Er on Al-Zn-Mg alloy[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(3):598-603.
【11】SUH D W, LEE S Y, LEE K H, et al. Microstructural evolution of Al-Zn-Mg-Cu-(Sc) alloy during hot extrusion and heat treatments[J]. Journal of Materials Processing Technology, 2004, 155/156:1330-1336.
【12】戴晓元,夏长清,孙振起,等. Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织和性能[J].中国有色金属学报,2007, 17(3):396-401.
【13】KAIGORODOVA L I, SEL'NIKHINA E I, TKACHENKO E A, et al. Effect of small additions of Sc and Zr on the structure and mechanical properties of an Al-Zn-Mg-Cu alloy[J]. Physics of Metals and Metallography, 1996, 81(5):513-519.
【2】HEINZ A, HASZLER A, KEIDEL C, et al. Recent development in aluminium alloys for aerospace applications[J]. Materials Science and Engineering A, 2000, 280(1):102-107.
【3】王艺淋,潘清林,韦莉莉,等. 高强7050-T7451铝合金厚板的疲劳断口特征[J]. 机械工程材料, 2013, 37(6):26-30.
【4】刘文辉, 张新民, 李惠杰, 等. 固溶处理对7A55铝合金断裂韧性的影响[J]. 中南大学学报(自然科学版), 2007, 38(1):41-45.
【5】魏群义,彭晓东,谢卫东,等. 超高强度铝合金的应力腐蚀开裂[J]. 机械工程材料, 2003, 27(6):8-10.
【6】REDA Y, ABDEL-KARIM R, ELMAHALLAWI I. Improvements in mechanical and stress corrosion cracking properties in Al-alloy 7075 via retrogression and reaging[J]. Materials Science and Engineering A, 2008, 485(1):468-475.
【7】袁武华,张传阳.稀土元素含量对铝合金显微组织和性能的影响[J]. 机械工程材料, 2014, 38(11):54-59.
【8】蒋建辉,郑子樵,唐娟,等. 单级时效7056铝合金的显微组织与性能[J]. 机械工程材料, 2013, 37(4):69-74.
【9】WANG S H, MENG L G, YANG S J, et al. Microstructure of Al-Zn-Mg-Cu-Zr-0.5Er alloy under as-cast and homogenization conditions[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(7):1449-1454.
【10】XU G F, MOU S Z, YANG J J, et al. Effect of trace rare earth element Er on Al-Zn-Mg alloy[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(3):598-603.
【11】SUH D W, LEE S Y, LEE K H, et al. Microstructural evolution of Al-Zn-Mg-Cu-(Sc) alloy during hot extrusion and heat treatments[J]. Journal of Materials Processing Technology, 2004, 155/156:1330-1336.
【12】戴晓元,夏长清,孙振起,等. Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织和性能[J].中国有色金属学报,2007, 17(3):396-401.
【13】KAIGORODOVA L I, SEL'NIKHINA E I, TKACHENKO E A, et al. Effect of small additions of Sc and Zr on the structure and mechanical properties of an Al-Zn-Mg-Cu alloy[J]. Physics of Metals and Metallography, 1996, 81(5):513-519.
相关信息
