Effect of matrix recrystallization on morphology, crystallography and coarsening behavior of vanadium carbide in austenite
The effect of matrix recrystallization on the morphology and crystallography of B1-type vanadium carbide (VC) formed in austenite ({gamma}) was studied in an Fe-12Mn-0.3V-0.8C (mass%) alloy by transmission electron microscopy. With direct aging at 1173 K after solutionizing, without cold rolling, VC precipitates display a cube-cube orientation relationship with respect to {gamma}. In the early stage of aging, the morphology of VC is octahedral with {l_brace}1 1 1{r_brace}{sub {gamma}} facets, but with prolonged aging, {l_brace}0 0 1{r_brace}{sub {gamma}} facets with lower boundary energy replace the preexisting {l_brace}1 1 1{r_brace}{sub {gamma}} facets, resulting in a change in VC morphology from octahedral to tetra-kai-decahedral. After the {gamma} matrix containing these VC precipitates is recrystallized, the morphology and crystallography of the VC change significantly, exhibiting no specific VC/{gamma} orientation relationship as well as no specific morphology. Coarsening of VC is significantly accelerated after {gamma} recrystallization, presumably due to an increase in VC/{gamma} boundary energy and short-circuit diffusion during passage of the {gamma} grain boundary over the VC particles during grain growth.
- OSTI ID:
- 20634727
- Journal Information:
- Acta Materialia, Vol. 52, Issue 12; Other Information: DOI: 10.1016/j.actamat.2004.04.027; PII: S1359645404002435; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1359-6454
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the origin of the R orientation in the recrystallization textures of aluminum alloys
Interfaces in a modified Inconel 718 with compact precipitates