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- Title
Effect of Deformation Prior to Nitriding on Microstructure and Hardness Behavior in Plasma-Nitrided Ferritic Alloys.
- Authors
Fanhui Meng; Goro Miyamoto; Yoshikazu Todaka; Tadashi Furuhara
- Abstract
In order to clarify the effect of deformation prior to nitriding and alloying elements on nitriding behavior in FeM binary alloys, pure iron and FeM (M= Al, Cr) binary ferritic alloys, which had been deformed by high pressure torsion (HPT) process, were plasma-nitrided at 843K for 3.6 ks, then the microstructure and hardness of them were investigated. It was found that the effects of deformation on hardness of nitriding diffusion zone in pure iron and Fe1Cr alloy were small. In contrast, the hardness of diffusion zone in Fe1Al alloy was greatly increased by deformation because deformation promoted the precipitation of AlN more extensively than non-deformed specimen. In addition, deformation resulted in more homogeneous growth of the compound layer with the finer grain size of £A on the compound layer. This feature was observed most remarkably in Fe1Al alloy, where needle-like £A compound layer was formed in the non-deformed specimens.
- Subjects
NITRIDING; HARDNESS; MICROSTRUCTURE; DEFORMATIONS (Mechanics); IRON alloys; ALLOYS; BINARY metallic systems
- Publication
Materials Transactions, 2022, Vol 63, Issue 6, p864
- ISSN
1345-9678
- Publication type
Article
- DOI
10.2320/matertrans.MT-H2021002