| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Development of Light Weight Alloys and Composites
|
| Presentation Title |
Development of Bulk Nanocrystalline Aluminum Materials with Enhanced Mechanical Properties |
| Author(s) |
Pradeep L. Menezes, Sridhar Lanka, Raven Maccione, Bhaskar Vadlamani , Manoranjan Misra |
| On-Site Speaker (Planned) |
Raven Maccione |
| Abstract Scope |
Manufacturing bulk nanocrystalline (NC) materials with lightweight and superior mechanical properties have been of considerable interest to material scientists. In the present research, to develop NC materials, powders of Al, and Al-5wt.%Mg alloys, were cryo-milled under controlled liquid nitrogen temperatures for different durations. The cryo-milled powders were characterized using X-ray diffraction, scanning electron microscope, and transmission electron microscope. The crystallite size significantly decreased with increasing cryo-milling duration. Further, spark plasma sintering of cryo-milled Al and Al-Mg powders were carried out to manufacture bulk component. The results showed that the cryo-milled Al and Al-Mg components showed superior mechanical properties compared to non-cryo-milled Al and Al-Mg components. Furthermore, the Al-Mg components were superior to Al components. Moreover, the cryo-milling duration had a significant effect on the strength properties. It can be inferred that the Mg dopant segregated at the grain boundary of Al during cryo-milling and enhanced the strength of the material. |