Microstructure evolution during semi continuous equal channel angular extrusion process of interstitial- free steel

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Yan, Bo^1,2 ; Jiao, Sihai^2 ; Zhang, Dianhua^1

State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China^1

RandD Center, Baoshan Iron and Steel Corporation Ltd, 889 Fujin Road, Baoshan District, Shanghai 201900, China^2

关键词: EBSD;    Equal channel angular extrusion;    IF steel;    Severe plastic deformations;    Ultrafine grained structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012013/pdf
DOI  :  10.1088/1757-899X/63/1/012013

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to produce ultrafine grained structures, interstitial-free steel sheets have been processed using a novel severe plastic deformation technique semi continuous equal channel angular extrusion (SC-ECAE) which is based on equal channel angular extrusion (ECAE) in an incremental way. The deformation was carried out at room temperature and individual specimen was repeatedly processed to various passes. An overall grain size which is 0.55 μm was achieved after 10 passes (or an equivalent total strain of 4.8). The present paper reports the evolution of microstructures during deformation, which were examined and characterized using high resolution EBSD in a field emission gun SEM. The mechanisms of grain refinement are discussed.