A boundary-based approach to the multiscale microstructural characterization of a W-Ni-Fe tungsten heavy alloy. (May 2022)

• Record Type: Journal Article
• Authors: Haag, J.V.; Wang, J.; Edwards, D.J.; Setyawan, W.; Murayama, M.
• Is Part Of: Scripta materialia. Number 213(2022)
• Publication Date: 2022-05
• Subjects: Metal matrix composites (MMC) -- Thermomechanical processing -- Grain interfaces -- Dual phases -- Orientation relationship (OR); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.114587
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A combination electron backscattered diffraction and transmission electron microscopy based approach has been implemented to study the effects of purposefully introduced anisotropy in a tungsten heavy alloy (WHA) through hot-rolling. Particular attention has been paid to changes in number and proportion of various boundary types from a quantitative standpoint; incorporating qualitative behavioral observations from prior analyses to generate experimentally-validated bases for the examination and application of a microstructure which exhibits an optimal balance of strength and ductility. It is asserted that a combination of increased temperatures during rolling and additional isothermal hold time for the post-rolling annealing steps may lead to a reduction in unfavorable textural components due to rolling in the W-phase and a decrease in premature fracture due to W-W microcracking respectively. This is expected to further increase the proportion of interphase boundaries and improve the ductility of these rolled structures, producing a superior rolled WHA microstructure. Graphical abstract: Image, graphical abstract