陈大辉,陈铮,聂景江,洪晓露,刘永强,任丽宏,侯林冲.Al-Zn-Ni-Mg-Cu变形铝合金的共晶强化效应[J].稀有金属材料与工程,2020,49(7):2319~2325.[CHEN Dahui,CHEN Zheng,NIE Jingjiang,HONG Xiaolu,LIU Yongqiang,REN Lihong,HOU Linchong.EUTECTIC STRENTHENING EFFECT OF AL-ZN-NI-MG-CU ALUMINUM ALLOY[J].Rare Metal Materials and Engineering,2020,49(7):2319~2325.]
Al-Zn-Ni-Mg-Cu变形铝合金的共晶强化效应
投稿时间:2019-10-03  修订日期:2019-12-16
中文关键词:  Al-Zn-Ni-Mg-Cu铝合金  Al[sub_s]3[sub_e]Ni  力学性能  可焊性
基金项目:宁波市自然科学基金资助(项目号2017A610040)
中文摘要:
      在Al-Zn-Mg-Cu变形铝合金中加入3%~5%的Ni元素,通过共晶反应形成了大量的Al3Ni相,除MgZn2相时效强化以外还增加了Al3Ni相的弥散强化作用。Ni含量的增加既改善了Al-Zn-Mg-Cu变形铝合金的铸造性能和可焊性,又提高了抗拉强度和屈服强度。Al-Zn-Ni-Mg-Cu铝合金较佳的成分为Al-5.6Zn-3.5Ni-2Mg-1Cu,其抗拉强度、屈服强度和断后伸长率分别为650MPa、572MPa和7.5%,焊接接头的抗拉强度和断后伸长率分别为323MPa、2%。随着强度的增加,Al3Ni相由界面撕裂转变为自身断裂,Ni含量的增加提高了Al3Ni的强化效果,但不宜超过共晶点。降低Al3Ni相的长径比能抑制Al3Ni相的自身断裂,Al3Ni相的均匀分布能阻碍再结晶晶粒的异常长大。
EUTECTIC STRENTHENING EFFECT OF AL-ZN-NI-MG-CU ALUMINUM ALLOY
英文关键词:Al-Zn-Ni-Mg-Cu  aluminum alloy, Al3Ni  phase, eutectic  strengthening effect, tensile  properties, weldability
英文摘要:
      3%~5% Ni element is added to the Al-Zn-Mg-Cu deformed aluminum alloy, and a large amount of Al3Ni phases are formed by eutectic reaction, the particle strengthening effect of the Al3Ni phases is added besides of MgZn2 aging strengthening. The increase of Ni content not only improves the casting performance and weldability of the Al-Zn-Mg-Cu deformed aluminum alloy, but also increases the tensile strength and yield strength. The preferred composition of Al-Zn-Ni-Mg-Cu aluminum alloy is Al-5.6Zn-3.5Ni-2Mg-1Cu. Its tensile strength, yield strength and elongation are 650MPa, 572MPa and 7.5%, respectively. The tensile strength and elongation of its welded joint were 323 MPa and 2%, respectively. With the increase of Zn content, the Al3Ni phase changes from interfacial tear to self-fracture. Increasing the content of Ni helps to increase the strengthening effect of Al3Ni phases, but the content of Ni cannot beyond the eutectic point.Decreasing the aspect ratio of Al3Ni particles helps to suppress the self-fracture of Al3Ni phases. Uniform distribution of Al3Ni phase helps to prevent the abnormal growing of recrystallized grains.
作者单位E-mail
陈大辉 西北工业大学 凝固技术国家重点实验室,陕西 西安 davidchen52@163.com 
陈铮 西北工业大学 凝固技术国家重点实验室,陕西 西安  
聂景江 中国兵器科学研究院宁波分院 宁波  
洪晓露 中国兵器科学研究院宁波分院 宁波  
刘永强 中国兵器科学研究院宁波分院 宁波  
任丽宏 中国兵器科学研究院宁波分院 宁波  
侯林冲 中国兵器科学研究院宁波分院 宁波  
摘要点击次数: 45
全文下载次数: 36
查看全文  查看/发表评论  
关闭