Scanning and transmission electron microscopy microstructure characterization of mechanically alloyed Nb–Ti–Al alloys

Abstract

SummaryResults are presented of an investigation of the microstructure development during mechanical alloying and following consolidation of an Nb15Ti15Al alloy. The alloy was synthesized from elemental as well as pre-alloyed powders. The microstructure of this material was examined by transmission electron microscopy, scanning electron microscopy and X-ray diffraction. The use of pre-alloyed TiAl powder for synthesis of the Nb15Ti15Al alloy meant that a much shorter time was required to complete the mechanical alloying process compared with the synthesis of elemental powders. The investigation indicates that three phases were present in the consolidated materials: the Nb solid solution, the Nb 3 Al intermetallic phase and the dispersoid.

Microstructure and mechanical properties of Nb15Al10Ti alloy produced by mechanical alloying and high temperature processing

“…The goal of this work was to produce a bulk Nb15Al10Ti alloy by MA followed by consolidation of powder at high temperature. The work is an extension of our study on ternary Nb‐Ti‐Al alloys produced by MA (Rozmus et al , 2006a, 2006b, 2007). The chemical composition of the investigated alloy was based on the Nb‐Ti‐Al ternary phase diagram (Villars et al , 1995).…”

“…The work is an extension of our study on ternary Nb-Ti-Al alloys produced by MA (Rozmus et al, 2006a(Rozmus et al, , 2006b(Rozmus et al, , 2007. The chemical composition of the investigated alloy was based on the Nb-Ti-Al ternary phase diagram (Villars et al, 1995).…”