|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Effect of Cu on Structure and Mechanical Properties in an Al-0.3%Cu Alloy Cold Rolled to 98%
||Tianlin Huang, Linfei Shuai, Guilin Wu, Xiaoxu Huang
|On-Site Speaker (Planned)
In this study, the distribution of Cu element in a Al (99.9996% purity)-0.3%Cu alloy cold rolled to 98% has been characterized in detail by using three-dimensional atom probe (3DAP) and ChemiSTEM techniques. The cold rolled structure is a typical high strain lamellar structure with an average boundary spacing of 200 nm, indicating a strong role of the small amount of Cu element in stabilizing the microstructure to form the fine scale structure. A heavy segregation of Cu element in the lamellar boundaries of high angles has been observed and the Cu concentration in the boundaries can be as high as 20 times of the nominal concentration of the alloy, which is considered as the main reason for a formation of a stable nanoscale lamellar structure. The effect of Cu on strength and flow stability has also been discussed.
||Planned: Supplemental Proceedings volume