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 of Al-5Cu-0.8Mg-0.15Zr-0.2Sc Alloy with T6 Treated State
王莹 1陈立佳 1车欣 1张浩宇 1张思倩1
作者信息
- 1. 沈阳工业大学材料科学与工程学院,沈阳 110870
- 折叠
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.
Abstract
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-5 Cu-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Key words
aluminum alloy/tensile property/solid-solution plus aging treatment/ductile fracture引用本文复制引用
基金项目
国家自然科学基金项目(U21A20117)
出版年
2024
NETL
NSTL
万方数据