Microstructure, strength and fracture toughness of CuNb nanocomposites processed with high pressure torsion using multi-sector disks

SCRIPTA MATERIALIA

卷:189

Article

Hohenwarter, A.^1,2 

[1] Univ Leoben, Dept Mat Sci, Chair Mat Phys, Jahnstr 12, A-8700 Leoben, Austria

[2] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

关键词: Severe plastic deformation;    High pressure torsion;    Nanocomposite;    Hybrid materials;    Fracture toughness;   

DOI  :  10.1016/j.scriptamat.2020.07.061

来源: Elsevier

【 摘 要 】

CuNb composites were processed by high pressure torsion using specially designed disks consisting of a pre-defined number of single sector elements called multi-sector disks. By variation of the applied plastic strain the composite structure could be tuned ranging from relatively coarse multilayer structures to nanostructured laminates. In this first study the technique is introduced, the microstructural and hardness evolution of CuNb with varying strain is presented and a fracture toughness study of the finest composite structure showing good damage tolerance has been performed. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

Free