About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Effect of Material Thickness on Laser Powder Bed Fusion Alloy 625 Mechanical Properties |
| Author(s) |
Mary Story, Emily Kistler, Daniel Drazkowski |
| On-Site Speaker (Planned) |
Mary Story |
| Abstract Scope |
AM provides a compelling method by which heat exchangers can be made smaller, simpler to manufacture, and to have improved power density relative to traditional manufacturing methods. To minimize size and maximize power density, internal heat transfer surfaces must be as thin as possible while still able to maintain structural integrity, resulting in a delicate balance between opposing goals and requirements. Complex internal geometries with inaccessible surfaces are often inherent to designs with improved manufacturability, resulting in final products with rough as-built heat transfer surfaces. Below some material-dependent thickness, mechanical properties depart from bulk material; therefore, understanding mechanical properties of thin specimens is critical in developing alloys for heat transfer surface applications. Tensile testing and microstructure characterization was conducted on flat LPBF A625 specimens with various thicknesses. Results indicate the method used to determine cross-sectional area can greatly impact calculated mechanical properties for very thin specimens with as-built surfaces. |