Effect of Rolling on Microstructure Evolution and Plastic Deformation Behavior of A473M Martensitic Stainless Steel

In this study, the surface of A473M martensitic stainless steel was strengthened by rolling processing technology. The microstructure evolution and plastic deformation behavior were characterized by electron backscatter diffraction (EBSD). The experimental results indicated that residual compressive stress would be formed on the surface of A473M steel after rolling, and the maximum value could reach 946 MPa. The surface roughness decreased significantly from 383 nm to 62.7 nm, which was only 1/5 of the matrix. The microstructure of rolled samples was obviously refined, and <101> // ND texture is formed. The nano-hardness of the hardened layer on the sample surface increased from 2.5 GPa to 4.8 GPa, and the elastic modulus increased from 140 GPa to 217 GPa. Compared with the matrix, the tensile strength and yield strength after rolling are increased by 40% and 22%, respectively. EBSD analysis indicated that the texture of the rolled samples after tensile changed from the <101> // TD direction of the matrix to the <101> // TD and <111> // RD directions. This article is protected by copyright. All rights reserved.