Synthesis of Bulk Nanocrystalline Materials and Bulk Metallic Glasses by Repeated Cold Rolling and Folding (RCR)

Gerhard Wilde

doi:10.4028/www.scientific.net/MSF.579.109

Paper Titles

Mechanical Properties of Nanocrystalline Materials Produced by In Situ Consolidation Ball Milling
p.15

Superplastic Behavior in Ultrafine-Grained Materials Produced by Equal-Channel Angular Pressing
p.29

Plastic Behavior of Metals in Reverse Straining after Large Pre-Strains
p.41

Bulk Ultrafine and Nanostructured Materials from Consolidation of Particles by Severe Plastic Deformation
p.61

Ultrafine and Nanostructured Refractory Metals Processed by SPD: Microstructure and Mechanical Properties
p.75

Surface Nanocrystallization by Surface Mechanical Attrition Treatment
p.91

Synthesis of Bulk Nanocrystalline Materials and Bulk Metallic Glasses by Repeated Cold Rolling and Folding (RCR)
p.109

Microstructure and Mechanical Properties of Nanostructured Metals Produced by High Strain Deformation
p.135

Deformation Twins and Stacking Faults in an AA5182 Al-Mg Alloy Processed by High Pressure Torsion
p.147

HomeMaterials Science ForumMaterials Science Forum Vol. 579Synthesis of Bulk Nanocrystalline Materials and...

Synthesis of Bulk Nanocrystalline Materials and Bulk Metallic Glasses by Repeated Cold Rolling and Folding (RCR)

Abstract:

Repeated cold rolling with intermediate folding (RCR) represents a technique to obtain severe plastic deformation that avoids excessive heating at the internal interfaces and that proceeds without the simultaneous action of a high pressure in the range of several GPa. Aside from the opportunity to obtain amorphous bulk samples, the processing pathway also allows for synthesizing dense, bulk nanocrystalline materials. The sequential combination of different processing routes that drive a material to a different extent -, with different rates - and by different means from thermodynamic equilibrium present new and attractive processing opportunities to obtain bulk nanocrystalline or massive ultrafine grained materials that are widely unexplored. Here, an overview is presented concerning the sequential application of different deformation methods with largely different strain and pressure levels. The basic underlying mechanisms that can lead to ultrafine grained or nanocrystalline microstructures for pure metals or to two-phase nanocomposites or bulk metallic glasses for alloys are discussed and the current state of nanostructure control is highlighted by selected examples.