| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Crack Initiation and Growth Behavior of Additively Manufactured Contemporary Aluminum Alloys: Surface Roughness, Micro-/Defect-structure, and Build Orientation |
| Author(s) |
Pooriya Nezhadfar, Muztahid Muhammad, Mikyle Paul, Spencer Thompson, Ankit Saharan, Nam Phan , Nima Shamsaei |
| On-Site Speaker (Planned) |
Pooriya Nezhadfar |
| Abstract Scope |
Aluminum alloys are one of the prominent materials for additive manufacturing (AM), and much effort has been devoted to developing novel, high-strength aluminum alloys. However, the fatigue performance of these alloys needs to be thoroughly investigated before being deployed in critical load-bearing applications. It is well known that surface roughness, micro-/defect-structure, and build orientation can affect AM materials' different stages of fatigue behavior, including their crack initiation and growth. Accordingly, this study investigates the crack initiation and growth behavior of six aluminum alloys in different surface conditions and build orientations fabricated via a laser beam powder bed fusion (LB-PBF) AM process. The role of surface roughness and micro-/defect-structure on the crack initiation behavior of these alloys is investigated. In addition, the effect of build orientation on micro-/defect-structure, and consequently, on fatigue crack initiation and growth behavior of these alloys are addressed, and anisotropy in fatigue behavior is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |