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- Title
Influence of La Addition on Order–Disorder Transformation and Deformation Softening Behavior of Fe–6.5 wt % Si Alloy.
- Authors
Guojun Cai; He, Longting; Huang, Yanru
- Abstract
Because of the existence of B2 and DO3 ordered phases with high hardness and brittleness, the poor plasticity at room temperature brings some difficulties for the industrial production of high silicon steels. The influence of La as a microalloying element on order–disorder transformation and deformation softening behavior of Fe–6.5 wt % Si alloy was studied during warm rolling. The solid drag effect of La reduced the ability of Fe and Si atoms to diffuse to neighboring vacancies in ordered structures, and hindered the nucleation and growth of the B2 ordered phase, resulting in a decrease in the content of B2 phase and size of its particles. Moreover, DSC results indicated that the disappearance of DO3 ordered phase was attributable to the change in order-disorder transformation temperature. The values of nano-hardness decreased from 11.2 GPa for non-La-doped alloy to 5.3 GPa for La-doped alloy, which indicated that the deformation softening ability of Fe–6.5 wt % Si alloy was significantly improved by adding rare earth La.
- Subjects
METALLOGRAPHY of silicon steel; METAL coating; MICROHARDNESS; BRITTLENESS; RARE earth metals
- Publication
Physics of Metals & Metallography, 2022, Vol 123, Issue 13, p1343
- ISSN
0031-918X
- Publication type
Article
- DOI
10.1134/S0031918X22700016