| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5463631 | Materials Letters | 2017 | 12 Pages |
Abstract
Herein, the fine-scaled α phase precipitation during step-quench heat treatments in Tiâ15Nbâ3.0Fe and Tiâ11Nbâ3.5Fe (wt%) alloys was evaluated. Thermodynamic analyses suggest that Tiâ11Nbâ3.5Fe alloy should present homogenous α phase formation via the pseudospinodal mechanism when solution-treated and step-quenched at 450 °C, which is confirmed in this work. STEM-EDX measurements confirm the non-equilibrium state of the α phase precipitates, whose Nb content is significantly higher than that of the α phase laths obtained after solution heat treatment followed by furnace cooling. Fe seems to play an important role in the precipitation mechanism, and is depleted from α phase laths in a short aging time.
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Authors
Camilo A.F. Salvador, Eder S.N. Lopes, Jefferson Bettini, Rubens Caram,