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

Materia

article

Abdrakhman Naizabekov¹  Sergey Lezhnev¹  Evgeniy Panin²  Irina Volokitina¹  Andrey Kasperovich³ 

[1] Rudny Industrial Institute;Karaganda Industrial University;Belarusian State Technological University

关键词: severe plastic deformation;    ultra-fine grained structure;    radial-shear rolling;    microstructure;    mechanical properties;   

DOI  :  10.1590/S1517-707620210003.13018

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

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 °C 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.

【 授权许可】

CC BY