Introduction
Experimental
V (wt.%) | V (at.%) | O (wt.%) | N (wt.%) | C (wt.%) | S (wt.%) | Fe | |
---|---|---|---|---|---|---|---|
Fe–4wt.%V | 4.05 ± 0.07 | 4.42 ± 0.07 | 0.0155 ± 0.0010 | <0.0006 | 0.0006 ± 0.0003 | 0.0005 ± 0.0002 | Bal. |
Results and discussion
Phase identification and morphology of the nitrided zone
Quantitative phase analysis of the surface layer (compound/“white” layer)
Element content in the compound layer (from EPMA) | N in γ| phase (at.%) | |||
---|---|---|---|---|
(1) [N]total (at.%) | (2) [V] (at.%) | (3) [Fe] (at.%) | (4) = (1) − (2) N associated with Fe (assuming that all V is present as VN) (at.%) | |
23.1 (±0.7) | 3.4 (±0.4) | 73.5 (±1.1) | 19.7 (±0.3) |
\( \frac{ ( 4 )}{ ( 3 )+ ( 4 )} \times 100 \) = 21.1 (±0.2) |