Abstract
The reversion process of martensite ( alpha prime ) to austenite ( gamma ) was investigated using 15. 62 percent Cr-9. 83 percent Ni (16-10) and 17. 62 percent Cr-8. 78 percent Ni (18-9) steels with metastable austenitic structure by means of transmission electron microscopy and magnetic analysis. The used steels transform to lath alpha prime from gamma by 90 percent cold rolling, and reverse to gamma again by the following annealing at temperature above about 900 K. The reversion processes are greatly different in the two steels. The difference is clear for 923 K isothermal annealing after 90 percent cold rolling. The results are: (1) for 16-10 steel, alpha prime reverses to gamma during heating up to 923 K by a martensitic shear transformation. The gamma structure contains high density of dislocations and traces of alpha prime block which was induced by cold rolling. During annealing at 923 K, the reversed gamma is refined to 0. 5 mu m in grain size by a recovery process. (2) for 18-9 steel, alpha prime reverses to gamma during annealing at 923 K by a diffusional nucleation-growth process. (3) The reversion process of alpha prime to gamma is greatly dependent on the composition of steels and annealing temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 1649-1656 |
| Number of pages | 8 |
| Journal | Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan |
| Volume | 74 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Jan 1 1988 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry
Cite this
REVERSION PROCESS OF DEFORMATION INDUCED MARTENSITE TO AUSTENITE IN METASTABLE AUSTENITIC STAINLESS STEELS. / Tomimura, Kouki; Takaki, Setsuo; Tokunaga, Youichi.
In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 74, No. 8, 01.01.1988, p. 1649-1656.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - REVERSION PROCESS OF DEFORMATION INDUCED MARTENSITE TO AUSTENITE IN METASTABLE AUSTENITIC STAINLESS STEELS.
AU - Tomimura, Kouki
AU - Takaki, Setsuo
AU - Tokunaga, Youichi
PY - 1988/1/1
Y1 - 1988/1/1
N2 - The reversion process of martensite ( alpha prime ) to austenite ( gamma ) was investigated using 15. 62 percent Cr-9. 83 percent Ni (16-10) and 17. 62 percent Cr-8. 78 percent Ni (18-9) steels with metastable austenitic structure by means of transmission electron microscopy and magnetic analysis. The used steels transform to lath alpha prime from gamma by 90 percent cold rolling, and reverse to gamma again by the following annealing at temperature above about 900 K. The reversion processes are greatly different in the two steels. The difference is clear for 923 K isothermal annealing after 90 percent cold rolling. The results are: (1) for 16-10 steel, alpha prime reverses to gamma during heating up to 923 K by a martensitic shear transformation. The gamma structure contains high density of dislocations and traces of alpha prime block which was induced by cold rolling. During annealing at 923 K, the reversed gamma is refined to 0. 5 mu m in grain size by a recovery process. (2) for 18-9 steel, alpha prime reverses to gamma during annealing at 923 K by a diffusional nucleation-growth process. (3) The reversion process of alpha prime to gamma is greatly dependent on the composition of steels and annealing temperature.
AB - The reversion process of martensite ( alpha prime ) to austenite ( gamma ) was investigated using 15. 62 percent Cr-9. 83 percent Ni (16-10) and 17. 62 percent Cr-8. 78 percent Ni (18-9) steels with metastable austenitic structure by means of transmission electron microscopy and magnetic analysis. The used steels transform to lath alpha prime from gamma by 90 percent cold rolling, and reverse to gamma again by the following annealing at temperature above about 900 K. The reversion processes are greatly different in the two steels. The difference is clear for 923 K isothermal annealing after 90 percent cold rolling. The results are: (1) for 16-10 steel, alpha prime reverses to gamma during heating up to 923 K by a martensitic shear transformation. The gamma structure contains high density of dislocations and traces of alpha prime block which was induced by cold rolling. During annealing at 923 K, the reversed gamma is refined to 0. 5 mu m in grain size by a recovery process. (2) for 18-9 steel, alpha prime reverses to gamma during annealing at 923 K by a diffusional nucleation-growth process. (3) The reversion process of alpha prime to gamma is greatly dependent on the composition of steels and annealing temperature.
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U2 - 10.2355/tetsutohagane1955.74.8_1649
DO - 10.2355/tetsutohagane1955.74.8_1649
M3 - Article
VL - 74
SP - 1649
EP - 1656
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
SN - 0021-1575
IS - 8
ER -