| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Coatings and Surface Engineering for Environmental Protection
|
| Presentation Title |
C-5: Localized Corrosion Behaviour of AA7150 after Ultrasonic Shot Peening: Corrosion Depth vs. Impact Energy |
| Author(s) |
Qingqing Sun, Qingyou Han |
| On-Site Speaker (Planned) |
Qingqing Sun |
| Abstract Scope |
The effect of impact energy on localized corrosion behaviour of ultrasonic shot peened AA 7150 was systematically studied by manipulating peening parameters such as peening duration, peening amplitude, peening distance and peening media size. Needle-like pits with depths deeper than that of the untreated alloy were observed on low energy peened samples. However, localized corrosion was eliminated for high energy peened alloys. The formation of equiaxed nanograins on surface layer significantly enhanced pit initiation resistance but accelerated propagation kinetics. Galvanic interaction between surface layer and substrate alloy caused by surface segregation was also discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |