Studies on the heterogeneous precipitation in an AI-Cu-Mg alloy
- 作者：Yanqing YangZongqiang FengMaohua LiYanxia ChenBin Huang
- 会议时间：2012-10-18
- 关键词：Al-Cu-Mg alloy ; heterogeneous precipitation ; HRTEM ; 3D tomography
- 作者单位：State Key Lab of solidification Processing, Northwestern Polytechnical University, Xi'an, P.R.China
- 母体文献：第八届全国材料科学与图像科技学术会议论文集
- 会议名称：第八届全国材料科学与图像科技学术会议
- 会议地点：山东荣成
- 主办单位：中国体视学学会
- 语种：chi
摘要
The properties of an age-hardening aluminum alloy can be affected greatly by the heterogeneous precipitation.The microstructures of the heterogeneous precipitation in an Al-Cu-Mg alloy after artificial ageing were investigated.Two kinds of S phase formed along dislocation were observed by HRTEM and the precipitation sequence,variant selection and the strengthening effect of the S precipitates were discussed.The three-dimentional morphology of the S phase formed along dislocation lines,on grain boundary were characterized by using the technique of STEM-HAADF 3D tomography.Quantitative parameters describing the shape and the distribution of the grain boundary precipitates (GBP) were calculated based on the 3D tomography analysis.