Bainite mechanical properties

Numerous investigations have been done regarding the liquidus surface, die isothermal sections and the vertical sections in the stable and metastable systems. The other investigations on die ternary system concern the solubility measurements of carbon in the "y and liquid phases which go always widi activity measme-ments, the determination of the phase diagram under high pressures and die kinetics studies of die austenite transformation in martensite or bainite because these phases are important in die forecast of mechanical properties of steel. The main experimental investigations on crystal structure, phase equilibria and thermodynamics are gathered in Table 1. 

Fig. 8 shows the microstructure of each specimen which corresponds to the mechanical properties at different salt bath temperatures. The bainite structure can be fined with reducing the salt bath temperature. The retained y phase has the contribution to improve the brittleness effect and enhance the tensile reliability. 

Hkdh Bhadeshia, "Martensite and bainite in steels Transformation mechanism mechanical properties". Journal De Physique Iv, 7(C5), 1997 pp. 367-376. 

Y. Luo, J. M. Peng, H. B. Wang, and X. C. Wu, "Effect of tempering on microstructure and mechanical properties of a non-quenched bainitic steel". Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 527(15), 2010 pp. 3433-3437. 

We now discuss the mechanical behavior of iron-carbon alloys having the microstructures discussed heretofore—namely, fine and coarse pearlite, spheroidite, bainite, and martensite. For all but martensite, two phases are present (ferrite and cementite), and so an opportunity is provided to explore several mechanical property-microstructure relationships that exist for these alloys. 

For iron-carbon alloys, in addition to discussions of the heat treatments that produce the several microconstituents (fine/coarse pearlite, bainite, martensite, etc.) and their mechanical properties, correlations were made between mechanical properties and structural elements of these microconstituents. These correlations are indicated in the following concept map ... 

Briefly cite the differences among pearlite, bainite, and spheroidite relative to microstructure and mechanical properties. 

---