On Grain Boundary Engineering of UFG Metals and Alloys for Enhancing their Properties

Ruslan Valiev

doi:10.4028/www.scientific.net/MSF.584-586.22

Paper Titles

Preface

Factors Influencing the Development of Homogeneity in Disks Processed by High-Pressure Torsion
p.3

R&D of NanoSPD Materials in Ufa via International Cooperation
p.9

Advantages and Limitations of HPT: A Review
p.16

On Grain Boundary Engineering of UFG Metals and Alloys for Enhancing their Properties
p.22

Analysis of the Fundamental Mechanisms and Efficiency of the Deformation Methods of Nanostructuring
p.29

Features of Work Hardening of Polycrystals with Nanograins
p.35

Nanoglasses: A Way to Solid Materials with Tunable Atomic Structures and Properties
p.41

Nanostructured SPD Processed Titanium for Medical Implants
p.49

HomeMaterials Science ForumMaterials Science Forum Vols. 584-586On Grain Boundary Engineering of UFG Metals and...

On Grain Boundary Engineering of UFG Metals and Alloys for Enhancing their Properties

Abstract:

The concept of grain boundary (GB) engineering of ultrafine-grained (UFG) metals and alloys is proposed for enhancement of properties by tailoring different GBs (low angle and high angle ones, special and random, equilibrium and non-equilibrium) and formation of GB segregations and precipitations using SPD processing. By variations of regimes and routes of SPD processing we show for several light alloys (Al and Ti) the ability to produce UFG materials with different grain boundaries, and this can have a dramatical effect on mechanical behavior of the processed materials. This paper demonstrates also several new examples of this approach for attaining superior strength and ductility as well as enhanced superplasticity at low temperatures and high strain rates in various UFG metals and alloys.