TEM Characterization of the Microstructure of Hot-Hydrostatically Extruded 93W-4.9Ni-2.1Fe Alloy

Abstract:

The microscopic analysis of 93W-4.9Ni-2.1Fe (wt. %) tungsten heavy alloy by hot-hydrostatic extrusion with severe plastic deformation strengthening were experimentally investigated mainly by transmission electron microscopy. Due to the profound differences in hardness of the tungsten particles and the NiFeW matrix a special TEM specimen preparation method had to be employed.It was shown that the microstructure of the as-extruded alloy was characterized by elongated tungsten particles with refinement cellular sub-structures consisting of high-density dislocations embedded in a binding Ni-Fe-W matrix phase with fine dynamically re-crystallized grains.

• Periodical: Applied Mechanics and Materials (Volumes 490-491)
• Pages: 198-202
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.490-491.198
• Online since: January 2014
• Authors: Yu Chen, Yang Yu, Wen Cong Zhan, Er De Wang
• Keywords: Hot-Hydrostatic Extrusion, Microscopic Analysis, TEM, Tungsten Heavy Alloy

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