|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||D-71: The Role of In Situ Stacking Faults in the Deformation Mechanism of I-Al
||Miran Joo, Jeheon Jeon, Donghyun Bae
|On-Site Speaker (Planned)
In-situ stacking faults (SFs) are observed in Al alloys which are fabricated by using the conventional casting process. In general, since Al has high stacking fault energy (SFE), SFs hardly exist in Al. However, in our study, because of high chemical potential of nano-sized ZnO powder, Zn and O atoms can be decomposed from ZnO and dissolved in Al matrix, which can reduce SFE of Al. In-situ SFs play an important role in the deformation behavior of I-Al including the expansion of SFs and strong interaction of SFs with dislocations during plastic deformation. Therefore, strain hardening capacity of I-Al is improved with higher n value of I-Al (~0.32) compared to that of Al (~0.23), which contributes to the increase of ductility and ultimate tensile strength of I-Al.
||Planned: Light Metals