About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
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Presentation Title |
The Effect of Laser Surface Modification on the Corrosion and Fatigue Performance of AA5456-H116 |
Author(s) |
Mohammed A. Shabana, Rajaguru Jeyamohan, Ji Ma, John R. Scully, James T. Burns |
On-Site Speaker (Planned) |
Mohammed A. Shabana |
Abstract Scope |
AA5456-H116 is commonly used in marine, aviation, and automotive industries due to its distinct light weight and mechanical strength. An obstacle that industries face with this alloy is its susceptibility to corrosion due to the presence of beta (Al3Mg2) particles along grain boundaries. In this work, the effect of laser surface treatment (LST) on corrosion and fatigue performance is investigated. EBSD and SEM characterization of the microstructure reveals resolutionization of the beta phase and constituent particles in the LST region, leading to enhanced corrosion resistance. Fatigue performance is quantified by the total fatigue life, initiation life and small crack growth kinetics, which are captured through marker band analysis of the fractured surface. This analysis revealed faster crack propagation rate in the LST region compared with the bulk material and a drastic reduction in the crack initiation life due to the presence of laser-induced defects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, |