About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
Build Orientation and Stress Ratio Effects on the Fatigue Crack Growth Properties of Laser Powder Bed Fused Ti-6Al-4V |
Author(s) |
Mikyle Paul, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Mikyle Paul |
Abstract Scope |
While additive manufacturing enables the production of parts with complex geometries, anisotropy within the material may be induced during the fusion process, resulting in a directionally ordered microstructure. This directionality, if not removed by post-process heat treatments, could lead to differences in the mechanical behavior depending on the loading direction. Therefore, in this study, the fatigue crack growth properties of Ti-6Al-4V manufactured using laser powder bed fusion were investigated. Three build orientations, i.e., vertical, horizontal, and diagonal, were fabricated, stress relieved, and machined to standard compact tension specimens using wire electric discharge machining. Specimens were tested on servo-hydraulic load frames at three different stress ratios to capture the effects of mean stresses and crack closure on the fatigue crack growth behavior for different build orientations. Results indicated less dependence on build orientation in the threshold region as stress ratio was increased. Paris regions remained similar for all test conditions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Iron and Steel, Other |