Microstructure, Mechanical Properties and Deformation Behavior of Fe-28.7Mn-10.2Al-1.06C High Specific Strength Steel

The microstructure, properties and deformation behavior of Fe-28.7Mn-10.2Al-1.06C high specific strength steel were studied. The results showed that the density of experimental steel is about 6.59 g/cm(3) and the microstructure is austenite. With the increase in the annealing temperature, the tensile strength decreases and the elongation increases. When the annealing temperature is 950 degrees C, the strength-plastic product of the experimental steel is 54.82 GPa%, and the specific strength is 1.48 x 10(5) N center dot m/kg. Compared with 20Mn2CrNb high strength automobile steel, the specific strength of laboratory steel is increased by more than 20%. The deformation behavior of experimental steel is mainly: At the low strain, spacing of slip surface decreases; at high strain, dislocation walls and micro-strips are formed, and the austenite grains are segmented, increasing the dislocation density and starting more secondary slips.

Automated summary

The microstructure, properties, and deformation behavior of Fe-28.7Mn-10.2Al-1.06C high specific strength steel were studied. The results showed that the tensile strength decreases and the elongation increases with the increase in annealing temperature. Compared with 20Mn2CrNb high strength automobile steel, the specific strength of the laboratory steel is increased by more than 20%.