|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloy Development and Powder Manufacture for Additive Manufacturing
||Rapid Solidification of Cu-Sn(-Ti) Based Alloys: Towards Alloy Design for Selective Laser Melting
||Xiaoshuang Li, Adriaan B. Spierings, Konrad Wegener, Christian Leinenbach
|On-Site Speaker (Planned)
The emerging selective laser melting technique with high cooling rates (10E2 – 10E6 K/s) allows for embedding metastable particles like diamond into metals to form novel Metal Matrix Composites (MMC). However, it is necessary to understand the complicated metallurgical processes including rapid solidification and cyclic heat treatment of deposited layers for alloy development. The present work focuses on the effect of composition and cooling rate on phase and microstructure formation of Cu-Sn and Cu-Sn-Ti alloys under rapid heating and cooling conditions, which mimics the primary metallurgical step of the process. It turns out that a metastable Cu5.6Sn phase forms, and its fraction increases with the addition of Sn but decreases with increasing Ti. Ti triggers the formation of (Cu,Sn)3Ti5 that can be facetted as primary phase or lamellar due to eutectic reaction. Furthermore, the processability of a selected Cu-Sn-Ti powder using SLM will be discussed.
||Planned: Supplemental Proceedings volume