|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications III
||Efficient Production of a High-performance Dispersion Strengthened, Multi-principal Element Alloy
||Timothy Smith, Aaron Thompson, Timothy Gabb, Christopher Kantzos
|On-Site Speaker (Planned)
Additive manufacturing currently facilitates new avenues for materials discovery that have not been fully explored. Here we reveal how additive manufacturing can be leveraged to produce oxide dispersion strengthened (ODS), multi-principal element alloys (MPEA) without the use of traditional mechanical alloying or chemical reactions. This new processing technique employed resonant acoustic mixing to coat an equiatomic NiCoCr powder with nano-scale yttrium oxides. Then, through laser powder bed fusion (L-PBF), the coated powder was successfully consolidated into 99.9% dense parts. Microstructural analysis confirmed the successful incorporation and dispersion of nano-scale oxides throughout the build volume. Furthermore, high temperature mechanical testing of the ODS alloys showed significant improvements in strength and ductility over the baseline NiCoCr. As a result, this recently discovered processing route opens a new alloy design and production path that is synergistic between additive manufacturing and dispersion strengthening, possibly enabling a new generation of high-performance alloys for energy applications.
||Additive Manufacturing, High-Entropy Alloys, High-Temperature Materials