Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion
Authors: El-Tahawy, M., Gubicza, J., Huang, Y., Choi, H., Choe, H., Lábár, J.L. and Langdon, T.G.
Journal: Materials Science Forum
Volume: 879
Pages: 502-507
eISSN: 1662-9752
ISBN: 9783035711295
ISSN: 0255-5476
DOI: 10.4028/www.scientific.net/MSF.879.502
Abstract:The evolution of phase composition, microstructure and hardness in 316L austenitic stainless steel processed by high-pressure torsion (HPT) was studied up to 20 turns. It was revealed that simultaneous grain refinement and phase transformation occur during HPT-processing. The γ-austenite in the initial material transformed gradually to ɛ- and α’-martensites due to deformation. After 20 turns of HPT the main phase was α’-martensite. The initial grain size of ~42 μm was refined to ~48 nm while the dislocation density increased to ~143 × 1014 m-2 in the α’-martensite phase at the disk periphery processed by 20 turns. The microstructure and hardness along the disk radius became more homogeneous with increasing numbers of turns. An approximately homogeneous hardness distribution with a saturation value of ~6140 MPa was achieved in 20 turns.
Source: Scopus
Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion
Authors: El-Tahawy, M., Gubicza, J., Huang, Y., Choi, H., Choe, H., Lábár, J.L. and Langdon, T.G.
Conference: THERMEC 2016: 9th International Conference on Processing & Manufacturing of Advanced Materials
Dates: 29 May-3 June 2016
Journal: Materials Science Forum
Volume: 879
Pages: 502-507
eISSN: 1662-9752
ISBN: 9783035711295
ISSN: 0255-5476
DOI: 10.4028/www.scientific.net/MSF.879.502
Abstract:© 2017 Trans Tech Publications, Switzerland. The evolution of phase composition, microstructure and hardness in 316L austenitic stainless steel processed by high-pressure torsion (HPT) was studied up to 20 turns. It was revealed that simultaneous grain refinement and phase transformation occur during HPT-processing. The γ-austenite in the initial material transformed gradually to ɛ- and α’-martensites due to deformation. After 20 turns of HPT the main phase was α’-martensite. The initial grain size of ~42 μm was refined to ~48 nm while the dislocation density increased to ~143 × 1014 m-2 in the α’-martensite phase at the disk periphery processed by 20 turns. The microstructure and hardness along the disk radius became more homogeneous with increasing numbers of turns. An approximately homogeneous hardness distribution with a saturation value of ~6140 MPa was achieved in 20 turns.
Source: Manual
Preferred by: Yi Huang