| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Effect of High Fe Content on the Microstructure and Mechanical Properties of an Additively Manufactured Al-Si-Cu-Mg Alloy |
| Author(s) |
Jovid Rakhmonov, Sumit Bahl, Jonathan Poplawsky, Lawrence Allard, Alice Perrin, Alex Plotkowski, Amit Shyam |
| On-Site Speaker (Planned) |
Jovid Rakhmonov |
| Abstract Scope |
Iron is a common impurity in secondary Al-Si cast alloys; however, the high Fe content significantly deteriorates their mechanical properties, particularly ductility, which impedes the widespread use of secondary alloys in structural automotive applications. Given the preferable cost/environmental aspects of using secondary alloys over primary ones and the growing amount of secondary waste stream, new alloys and/or processes that accommodate increased impurity levels while possessing desirable properties are needed. The unique solidification conditions and rapid cooling rates of additive manufacturing processes could be leveraged to design new alloy compositions tolerant to increased Fe levels. This talk discusses the effect of increased Fe content on the microstructure and mechanical properties (tensile and fatigue) of Al-Si-Cu-Mg alloy fabricated via a laser powder-bed fusion process. Advanced microscopy techniques (SEM/EBSD, STEM, and APT) were utilized to study microstructural evolutions and to rationalize the high tensile/fatigue properties obtained for a high-iron Al-Si-Cu-Mg alloy. |