Anurag Gumaste, Abhijeet Dhal, Priyanshi Agrawal, Ravi Sankar Haridas, Vijay K. Vasudevan, David Weiss, & Rajiv S. Mishra

An innovative approach to build a high-performance, thermally stable Al-8Ce-10Mg (wt.%) alloy via friction-stir based solid-state additive manufacturing, called additive friction stir deposition, has been demonstrated in this study. The deposited material displayed 22% higher yield strength and 181% improvement in ductility as compared to the base material. The deposit also exhibited excellent tensile properties at elevated temperatures. The improved performance has been attributed to multiple strengthening mechanisms active in the built component. Al-Ce particle fragmentation, grain refinement, and retention of Mg in solid solution during the process synergistically resulted in the improved mechanical performance. The fragmentation of Al11Ce3 particles occurred due to intense frictional heating and shearing during the process. Scanning electron microscopy, nanoindentation, tensile testing, differential scanning calorimetry, and X-ray diffraction analysis were used to establish process–structure–property correlations at multiple length scales.

2023-08-24, Springer Link, ISSN 1543-1851

https://doi.org/10.1007/s11837-023-06044-6
Volume 75, Issue 10, Pages 4185-4198 Publication JOM

DOI 10.1007/s11837-023-06044-6