Figure 1. Sectioned, mounted and polished crucibles for examination with WDS to look for Sc losses during melting. The orange lines signify the positions of the line scans.


Figure 2. Scandium concentrations at points along WDS line scans where point 1 represents the inside edge of the crucible, and point 10 being nearest the outside edge. For simplicity, only the scans on the sides of a crucible are shown, but are representative of the scans across the bottom for the same crucible. Point 0 signifies the overall composition of the melt (1.6 wt% Sc).


Table 1. Hardness Values for Aged and Homogenized, and Just Aged Samples


Acknowledgments


I would like to acknowledge Owen Mills of the Materials Science and Engineering department at Michigan Techno- logical University for all of his help and expertise with the WDS analysis performed in this paper.


62


referenceS


1. Sadrenzhaad, S.K., Raz, S.B., “Interaction between Refractory Crucible Materials and the Melted NiTi Shape- Memory Alloy,” Metallurgical and Materials Science Transactions B, vol. 36B, pp.395-403 (June 2005).


International Journal of Metalcasting/Winter 2012


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