Abstract
Solubility of MnS in Fe-Ni alloys has been investigated by "in-situ" observation with a confocal scanning laser microscope of specimens with various Mn, S and Ni contents which were heated and cooled in an infrared image furnace. Precipitation behavior of MnS at the surface of the specimens on cooling was monitored on a CRT and was recorded on videotape. Most MnS precipitates are found to form on alumina inclusion particles and grow in triangular (pyramidal) or rod-like shape. From precipitation temperatures obtained by the "in-situ" observation, the equilibrium constant of the reaction MnS ⇌Mn + S is determined as log K=log[%Mn] [%S]fMnS = -9420/T+3.67, at T=1 329-1 493 K for Fe-42mass%Ni alloy. The K value for γ-Fe at 1 438 K is in good agreement with that by Turkdogan et al., and Ni is found to increase the solubility of MnS.
| Original language | English |
|---|---|
| Pages (from-to) | 317-323 |
| Number of pages | 7 |
| Journal | Isij International |
| Volume | 38 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1998 |
Keywords
- Fe-Ni alloy
- Laser microscopy
- Manganese sulfide
- Precipitation
- Solubility
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry