Development of nanostructured SUS316L-2%TiC with superior tensile properties

摘要: Abstract Structural materials used in radiation environments require tolerance and sufficient mechanical properties the controlled state. In order to offer SUS316L austenitic stainless steel with assumed requirements, nanostructured TiC addition of 2% (SUS316L-2TiC) that is capable exhibiting enhanced tensile ductility flow strength for structural applications was fabricated by advanced powder metallurgical methods. The methods include MA (Mechanical Alloying), HIP (Hot Isostatic Pressing), GSMM (Grain boundary Sliding Microstructural Modification) enhancement, cold rolling at temperatures below M d (the temperature where martensite phase occurs plastic deformation) transformation from austenite heat treatment reverse austenite. It shown developed SUS316L-2TiC exhibits ultrafine grains sizes 90–270 nm, accompanied precipitates 20–50 nm grain interior 70–110 nm boundaries, yield strengths 1850 900 MPa, 1920 1100 MPa uniform elongations 0.6–21%, respectively, depending on after at −196 °C.