Zr质量分数对7085铝合金组织和性能各向异性的影响  

Effects of Zr content on microstructure properties of anisotropy of 7085 aluminum alloy

作　　者：陈善达 焦慧彬 陈送义 黄兰萍[1,2] 陈康华 马云龙[4] 王会平 CHEN Shanda1,2,JIAO Huibin2,3,CHEN Songyi2,3,HUANG Lanping1,2,CHEN Kanghua1,2,3,MA Yunlong4,WANG Huiping4(1. State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China; 2. Collaborative Innovation Center of Advanced Nonferrous Structural Materials and Manufacturing,Central South University,Changsha 410083,China; 3. Light Alloy Research Institute,Central South University,Changsha 410083,China; 4. Beijing Institute of Astronautical Systems Engineering,Beijing 100076,Chin)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]中南大学有色金属先进结构材料与制造协同创新中心,湖南长沙410083 [3]中南大学轻合金研究院,湖南长沙410083 [4]北京宇航系统工程研究所,北京100076

出　　处：《中南大学学报（自然科学版）》2018年第6期1349-1357,共9页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划(2016YFB0300801);国家重点基础研究发展计划(973计划)项目(2012CB619502);国家自然科学基金资助项目(51327902;51201186)~~

摘　　要：通过室温拉伸试验、腐蚀性能测试和光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)等研究Zr质量分数对7085铝合金组织和性能各向异性的影响。研究结果表明:合金的强度随着Zr质量分数增加先增加再减小,Zr质量分数为0.12%时合金的强度出现峰值;添加Zr抑制合金再结晶,提高其强度和抗剥落腐蚀性能;挤压方向(L-T)力学性能均优于横向(T-L),Zr质量分数为0.12%时、各向异性最小;横截面的抗腐蚀性能优于长截面,Zr质量分数为0.14%时,抗腐蚀性能最佳且各向异性最小;合金的性能各向异性随Zr质量分数增加而先减小再后增大。Zr质量分数最佳添加范围为0.12%~0.14%,能保持高强度耐腐蚀性能并具有较低的各向异性。The influence of the content of Zr on the anisotropy of 7085 alloy was studied by room temperature tensile test, corrosion test and optical microscopy（OM）, scanning electron microscopy（SEM）, and transmission electron microscopy（TEM）. The results show that the strength of the alloy with the increase of Zr mass fraction first increases and then decreases. When Zr content is 0.12%（mass fraction）, the strength of the alloy in peak, The addition of Zr inhibits the recrystallization of the alloy and improves its strength and exfoliation corrosion resistance. The mechanics properties of the extruding direction（L-T） is better than that of transverse（T-L）. When Zr mass fraction is 0.12%, the alloy has minimum anisotropy. The corrosion resistance of cross section is superior to the long section. When Zr mass fraction is 0.14%, the alloy has the best corrosion resistance and minimum anisotropy. The anisotropic properties of the alloy with the increase of Zr mass fraction first increases and then decreases. The optimal Zr content is in the range of 0.12%-0.14%, which can maintain high strength and corrosion resistance and has low anisotropy.

关 键 词：7085铝合金 Zr元素 各向异性 力学性能 剥落腐蚀 

分 类 号：TG146[一般工业技术—材料科学与工程]