Hardening Mechanisms of Metals and Alloys Produced by SPD

Satoshi Hashimoto; T. Suzuki; Alexei Vinogradov

doi:10.4028/www.scientific.net/MSF.503-504.967

Paper Titles

Application of Severe Torsion Straining Process for Grain Refinement of Steel
p.943

Microstructures and Mechanical Properties of Mg Alloy after Severe Torsion Straining Process
p.949

Grain Refinement of Commercial Al-Mg Alloy Using Severe Torsion Straining Process
p.955

Effect of Severe Plastic Deformation on the Structure and Properties of the Age-Hardenable Mg-Sm Alloys
p.961

Hardening Mechanisms of Metals and Alloys Produced by SPD
p.967

Structure and Mechanical Properties of Submicrocrystalline Copper Produced by ECAP to Very High Strains
p.971

Grain Refinement by High Temperature Plane-Strain Compression of Fe-2%Si Steel
p.977

The Effect of Equal-Channel Angular Pressing on Structure-Phase Changes and Superplastic Properties of Al-Mg-Li Alloy
p.983

Dislocation-Crystal Plasticity Simulation Based on Self-Organization for Repartition of Dislocation Cell Structures and Subgrain
p.989

HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Hardening Mechanisms of Metals and Alloys Produced...

Hardening Mechanisms of Metals and Alloys Produced by SPD

Abstract:

Strengthening is a complex process involving such basic mechanisms as dislocation accumulation (work hardening), Hall-Petch hardening due to grain refinement, solid solution hardening and precipitation hardening in various combinations. The contribution of different mechanisms into resultant strength can vary significantly depending on chemical composition and processing. The purpose of the present work is to explore the significance of SPD for hardening and to clarify the role of different strengthening mechanisms. The model Au-based system was employed using pure Au, single phase solid solution Au-25Ag and precipitation hardenable Au-12.5Ag-12.5Cu (in mass %) alloy subjected to ECAP. The additive character of different strengthening mechanisms is clearly demonstrated. The extremely high strength exceeding 1 GPa is achieved in the Au-Ag-Cu after ECAP followed by aging, which has never been attained in conventional processing schemes.