About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
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Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
A-8: Development of Printable High Strength Aluminum-Copper Alloys for Additive Manufacturing Applications Using Grain Refinement and Crack Mitigation Alloying Strategies |
| Author(s) |
John Mackenzie O`Connell, Anne Dunn, Bhaskar Majumdar |
| On-Site Speaker (Planned) |
John Mackenzie O`Connell |
| Abstract Scope |
The rapid solidification seen in laser powder bed fusion (LPBF) and other types of additive manufacturing causes issues with segregation and cracking especially in aluminum copper alloys. This makes research and development of alloys that print well of paramount importance. Previous research has demonstrated that grain refinement can improve printability as well as serving to increase alloy strength. Cracking can be mitigated by increasing the amount of liquid present during final solidification via addition of eutectic forming elements. This work proposes to demonstrate that alloying Al-Cu with grain refining elements such as Zr and Ti and eutectic forming elements such as Si and Er can greatly improve the printability of Al-Cu alloys, and increase their strength. Printability is assessed via SEM, EDS, and EBSD. Tensile strength is measured using printed tensile bars. The alloy of interest are identified using the CALPHAD method and Schiel diagrams the Kou crack susceptibility model. |