We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Pseudo Sub-grain Formation and Evolution in a Ti<sub>3</sub>Al-Nb Based Alloy Induced by B2-BCC Disordering.
- Authors
Liu, Liangliang; Liu, Dong; Cui, Yuyou; Yang, Rui
- Abstract
The high temperature β/B2 phase field of Ti3Al-Nb based alloys was rarely studied due to limitation in experimental technique, but different states of this phase field lead to difference in subsequent phase transformation path and resulting microstructure. By controlling the heating temperature and dwell time of α2′ → β/B2 transformation and subsequent cooling rate, we achieved a new microstructure consisting of domains of the B2 phase with α2′ martensite occupying the disordered BCC domain walls, effectively forming a pseudo sub-grain microstructure. It is shown that the domain walls evolved from the disordered β phase in the β/B2 phase field. Such pseudo sub-grain boundaries refine the prior β grains by subdividing them into smaller α2 colonies that form during subsequent heat treatment in the α2′ + β/B2 phase field upon reheating, and improve the mechanical properties of the alloy.
- Subjects
HEAT treatment; MECHANICAL alloying; TEMPERATURE control; HEATING control; MARTENSITE
- Publication
Metallurgical & Materials Transactions. Part A, 2024, Vol 55, Issue 10, p3746
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-024-07530-5