Realization of the innovative potential of radial-shear rolling for forming the structure and mechanical properties of AISI-321 austenitic stainless steel

Abstract

In this paper the grain structure and mechanical properties of AISI-321 austenitic stainless steel subjected to 7 passes of radial-shear rolling at 1000 °С were investigated. The tensile strength (1076 MPa) and Vickers microhardness (322 HV) after 7 passes increased by 2.2 times and 2 times, respectively, relative to the initial annealed state (480 MPa, 160 HV). Ultra-fine grained structure (200-700 nm) formed in the bar section area from its surface to a depth of 0.25 of the radius. The transition zone is located in the area between 0.5 R and 0.25 R of the bar section. Anything deeper is a rolling texture. The 7-pass radial-shear rolling process is an effective way to form UFG structure and improved mechanical properties in AISI-321 austenitic stainless steel.

Design and experimental verification of a new type of cutter for shield machine cutting underground plastic drainage boards

“…WANG et al [12] proposed a point grinding method for designing circular tooth cutting tools on curved surfaces, and conducted cutter manufacturing and gear slicing experiments to verify the effectiveness of the proposed cutter design and manufacturing method. NAIZABEKOV et al [13] studied the mechanical properties of austenitic stainless steel after multiple radial shear rolling, providing a reference for cutter material selection. DU et al [14] used 3D printing technology to manufacture four cricket tooth like cutters, designed experiments, and studied their performance in cutting force and energy, providing a reference for designing efficient tea tree harvesters.…”