quantitative study of dimensional stability mechanism and microstructure evolution during precipitation process of 2024Al alloy

Youfang Cao ¹Longtao Jiang ²Deng Gong ¹Guoqin Chen ¹Ziyang Xiu ¹Yangming Cheng ³Xiufang Wang ³Gaohui Wu¹

扫码查看

作者信息

1. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
2. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001,China
3. Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China
折叠

Abstract

In this paper,we were devoted to quantitatively analyzing the dimensional change of 2024AI alloy dur-ing the aging process.Types of precipitates have been defined and the corresponding volume fraction has been measured with Transmission Electron Microscopy (TEM) and Three-Dimensional Atom Probe Tomography (3D-APT).Guinier-Preston-Bagaryatsky (GPB) zone (0.86 vol.％) was found after aging for 8 h.GPB zone (0.17 vol.％) and S'phase (1.02 vol.％) was found after aging for 24 h.The reduced dimensional change was attributed to the reduction of matrix lattice parameter.Relative to the initial supersaturated solid solution state,the lattice strain of-2.79 × 10-5 and-5.16 × 10-5 was produced after 8 h and 24 h aging respectively.The difference of the lattice parameters between the precipitates and matrix was also considered.A model was established to quantitatively describe the relationship between the precipitation process and dimensional change of 2024Al alloy.

Key words

Aluminum alloy/Aging/Atom probe tomography (APT)/Dimensional stability/Precipitate

引用本文复制引用

基金项目

National Natural Science Foundation of China(U1637201)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量1

段落导航