Isothermal transformation of ternary eutectoid steels with Cr,Ni,Mn additions
A mathematical model that describes the change in shape of T.T.T. curves for ternary-eutectoid steels with various types and contents of alloying elements has been developed by O. Dairiki. This model predicts also the partitioning coefficient of the ternary substitutional element between cementite and ferrite that occurs during austenite-pearlite reaction. The present research concerns experimental aspects and provides us with data that will be used to discuss the validity of the theoretical model. Three different alloying elements were chosen: chromium, nickel, and Mn in combination with Cr. Time-Transformation-Temperature curves for four different chromium eutectoid alloys, one nickel eutectoid alloy, and one chromium-manganese quarternary eutectoid alloy were determined using a dilatometry technique. Transmission electron microscopy was used for microstructure observation and characterization. Evidence of chromium partitioning between cementite and ferrite was found at high temperatures using analytical electron microscopy facilities.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5320266
- Report Number(s):
- LBL-17029; ON: DE84006563
- Resource Relation:
- Other Information: Thesis
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis of S-shaped temperature-time-transformation diagrams
On the ledge mechanism of pearlite growth: The Cu-Al lamellar eutectoid