Influence of additional severe plastic deformation at elevated temperatures on microstructure and physical-mechanical properties of ultrafine grained Al-0.4Zr alloy

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Latynina, T.A.^1 ; Murashkin, Yu M.^2,3 ; Valiev, R.Z.^2,3 ; Orlova, T.S.^1,4

ITMO University, 49 Kronverkskiy pr., St. Petersburg

197101, Russia^1

St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg

199034, Russia^2

Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marx str., Ufa

450000, Russia^3

Ioffe Institute, 26 Politekhnicheskaya str., St. Petersburg

194021, Russia^4

关键词: Effect of high pressure;    Elevated temperature;    Mechanical and electrical properties;    Physical-mechanical properties;    Severe plastic deformations;    Strengthening effect;    Theoretical estimation;    Ultrafine grained structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012027/pdf
DOI  :  10.1088/1757-899X/447/1/012027

来源: IOP

【 摘 要 】

The effect of high pressure torsion (HPT) at room temperature and subsequent HPT at elevated temperatures on the microstructure, mechanical and electrical properties of the Al-0.4Zr alloy has been investigated. It has been shown that the HPT treatment of the alloy with an ultrafine grained structure at elevated temperatures led to a drastic increase in strength, which is accompanied by an increase in conductivity. Experimental values and theoretical estimations of the yield stress and electrical resistivity at 77 K; are compared. Possible reasons for the observed strengthening effect are discussed.