时效处理对Al-Al_(2)Cu共晶合金纳米压痕蠕变的影响  

Effects of Aging on Nanoindentation Creep of Al-Al_(2)Cu Eutectic Alloy

作　　者：倪超 吴继礼 王琳 陆韬 Ni Chao;Wu Jili;Wang Lin;Lu Tao(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013;Jiangsu Key Laboratory for Advanced Metallic Materials,Nanjing 210096;School of Materials Science and Engineering,Southeast University,Nanjing 210096)

机构地区：[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 [3]东南大学材料科学与工程学院,南京210096

出　　处：《特种铸造及有色合金》2024年第2期251-256,共6页Special Casting & Nonferrous Alloys

基　　金：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)。

摘　　要：利用X射线衍射仪和光学显微镜分析了Al-Al_(2)Cu共晶合金经过不同时效处理后α-Al层和Al_(2)Cu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Al_(2)Cu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Al_(2)Cu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Al_(2)Cu层主导。The evolution of microstructure and nanoindentation creep behaviors ofα-Al layer and Al_(2)Cu layer in Al-Al_(2)Cu eutectic alloy after different aging treatments was investigated by X-ray diffractometer and optical microscope.The results reveal that blocky Al_(2)Cu 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 Al_(2)Cu layer are changed,indicating that the deformation resistance of eutectic alloy under high-temperature environment is dominated by Al_(2)Cu layer.

关 键 词：共晶合金 时效处理 纳米压痕蠕变 变形 

分 类 号：TG146.21[一般工业技术—材料科学与工程]