Ag元素和时效时间对T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc合金拉伸性能的影响  

Effect of Ag Element and Aging Time on Tensile Properties ofAl-5Cu-0.8Mg-0.15Zr-0.2Sc Alloy with T6 Treated State

作　　者：王莹[1] 陈立佳[1] 车欣[1] 张浩宇 张思倩[1] WANG Ying;CHEN Lijia;CHE Xin;ZHANG Haoyu;ZHANG Siqian(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《沈阳理工大学学报》2024年第4期51-56,共6页Journal of Shenyang Ligong University

基　　金：国家自然科学基金项目(U21A20117)。

摘　　要：为了明确Ag元素的添加对Al-Cu-Mg系铝合金拉伸性能的影响,针对T6态(固溶+时效处理)的热挤压Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)合金进行了室温和高温拉伸实验。结果表明,添加0.5%Ag元素可显著提高T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc合金的室温抗拉强度、屈服强度、峰时效态及该合金在150~300℃范围的抗拉强度和屈服强度,但会降低该合金的室温和高温塑性。断口形貌的扫描电子显微镜观察与分析结果表明,在室温及高温拉伸加载条件下,T6态Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)合金的拉伸断口上大部分存在韧窝和撕裂棱,表现出明显的韧性断裂特点。In order to clarify the effect of Ag addition on the tensile properties of Al-Cu-Mg series alloys,the tensile tests were performed at both room and elevated temperatures for the hot-extruded Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)alloys subjected to the solid-solution plus aging(T6)treat-ment.The experimental results revealed that the addition of 0.5%Ag could effectively enhance both yield and ultimate tensile strengths at room and elevated temperatures for the Al-5Cu-0.8Mg-0.15Zr-0.2Sc alloy subjected to the T6 treatment.Furthermore,the addition of 0.5%Ag could sig-nificantly increased both yield and ultimate tensile strengths of peak-aged Al-5Cu-0.8Mg-0.15Zr-0.2Sc alloy at the testing temperatures ranging from 150℃to 300℃.However,the addition of 0.5%Ag led to a decrease in the plasticity of the alloy at room and elevated temperatures.It was noted from the observation results on the morphology of tensile fracture surfaces with scanning elec-tron microscope that a great amount of dimple and tearing ridge appeared on the tensile fracture sur-faces.At room temperature and high temperature,most of the tensile fracture surfaces of Al-5Cu-0.8Mg-0.15Zr-0.2Sc(-0.5Ag)alloy have dimples and tear edges,which show distinct characteris-tics of ductile fracture.

关 键 词：Al-Cu-Mg系合金 拉伸性能 T6处理 韧性断裂 

分 类 号：TG146.2[一般工业技术—材料科学与工程]