Effects of the coherency of Al3Zr on the microstructures and quench sensitivity of Al–Zn–Mg–Cu alloys

Tse An Pan, Yu Chih Tzeng, Hui Yun Bor, Kuang Hui Liu, Sheng Long Lee

研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

Effects of the coherency of Al3Zr on the microstructures and quench sensitivity of Al-8.3Zn-2.3Mg-2.4Cu (AA7055) alloys were investigated. These alloys were subjected to two cold-rolling ratios (i.e., 5% and 20%) in order to vary the coherency of Al3Zr particles. The main objectives of this study were to reduce the quench sensitivity, refine the grain size, and retain the coherency of Al3Zr for high-strength Al–Zn–Mg–Cu production alloys. Results reveal that with the increase in the cold-rolling ratio, the quench sensitivity of the Zr-containing alloys increases. At a high cold-rolling ratio, the interface between Al3Zr particles and the matrix became semi-coherent after solution treatment. This semi-coherent interface led to the heterogeneous nucleation of solute atoms during quenching, which was the leading cause for the high quench sensitivity. By contrast, at a low cold-rolling ratio, the alloys did not exhibit any noticeable quench sensitivity. The Al3Zr particles retained coherence in the matrix and did not afford heterogeneous nucleation sites. On the other hand, regardless of the cold-rolling ratio, the alloys without Zr did not exhibit a high quench sensitivity. However, from the electron backscatter diffraction (EBSD) analysis, the grain size became coarser, and the recrystallization fraction was higher for alloys without Zr.

原文???core.languages.en_GB???
文章編號102611
期刊Materials Today Communications
28
DOIs
出版狀態已出版 - 9月 2021

指紋

深入研究「Effects of the coherency of Al3Zr on the microstructures and quench sensitivity of Al–Zn–Mg–Cu alloys」主題。共同形成了獨特的指紋。

引用此