Characterization of 150mm in Diameter NiTi SMA Ingot Produced by Electron Beam Melting

Abstract

Earlier works showed that NiTi shape memory alloy production by electron beam melting (EBM) is a viable process in which its main characteristic is the low contamination by impurities such as carbon and oxygen. Some difficulties arise when compared to conventional vacuum induction melting (VIM) process such as composition control and complex machine operation. This work focus on the production of ever made large scale 150mm in diameter NiTi ingot produced by EBM showing its viability. The carbon contamination was only 0.016wt% compared to usual 0.05wt% of VIM process. The ingot radial composition homogeneity was proved by small variation presented by direct and reverse peak martensitic transformations temperatures which was around 2°C.

Development of electroless plating processes for low cost plastic-metallization and area-selective metal coating of three-dimensional structures

“…The "direct" way to build up a metal product with additive manufacturing is to fully melt the metal and to directly manufacture the final part with AM power bed system or AM wire feed system (as illustrated in Figure 11), such as the Selective Laser Melting (SLM), [75,76] Electron Beam Melting (EBM), [77,78] and Laser Metal Deposition (LMD) processes. [6,79] Figure 11 Generic illustration of A) AM powder bed system; B) AM wire feed system.…”