时效处理对Al-Al2Cu共晶合金纳米压痕蠕变的影响
Effects of Aging on Nanoindentation Creep of Al-Al2Cu Eutectic Alloy
倪超 1吴继礼 1王琳 1陆韬2
作者信息
- 1. 江苏大学材料科学与工程学院,镇江 212013
- 2. 江苏省先进金属材料高技术研究重点实验室,南京 210096;东南大学材料科学与工程学院,南京 210096
- 折叠
摘要
利用X射线衍射仪和光学显微镜分析了Al-Al2Cu共晶合金经过不同时效处理后α-Al层和Al2Cu层的微观结构以及纳米压痕蠕变性能的演变规律.结果发现,在273℃下经过不同时效时间处理后,共晶合金中有块状Al2Cu相形成,并随着时间的延长数量增多.在195℃和273℃下经过不同时效时间处理后,α-Al层和Al2Cu层的蠕变应力指数和热激活体积的变化均发生改变,证明了共晶合金的高温服役环境下变形抗力由Al2Cu层主导.
Abstract
The evolution of microstructure and nanoindentation creep behaviors of α-Al layer and Al2Cu layer in Al-Al2Cu eutectic alloy after different aging treatments was investigated by X-ray diffractometer and optical microscope.The results reveal that blocky Al2Cu phases are formed in the eutectic alloy after aging at 273℃for different durations,of which the amounts are increased with aging time.After aging at 195℃and 273℃for different durations,the creep stress indexes and thermal activation volumes of α-Al layer and Al2Cu layer are changed,indicating that the deforma-tion resistance of eutectic alloy under high-temperature environment is dominated by Al2Cu layer.
关键词
共晶合金/时效处理/纳米压痕蠕变/变形Key words
Eutectic Alloy/Ageing Treatment/Nanoindentation Creep/Deformation引用本文复制引用
基金项目
江苏省先进金属材料高技术研究重点实验室开放研究基金资助项目(AMM2021A02)
出版年
2024
NETL
NSTL
万方数据