Twinning, Dislocations and Grain Size in NanoSPD Materials Determined by X-Ray Diffraction

Tamás Ungár; L. Balogh; Gábor Ribárik

doi:10.4028/www.scientific.net/MSF.584-586.571

Paper Titles

Microstructure and Mechanical Properties of Al-0.5 at.% X (=Si, Ag, Mg) Alloys Highly Deformed by ARB Process
p.547

High Pressure Torsion of Intermetallic Zr₃Al
p.553

Structure and Properties of Mg-Al-Ca Alloy after Severe Plastic Deformation
p.559

Microstructure and Texture of Mg-Based AZ Alloys after Heavy Deformation under Cyclic Strain Path Change Conditions
p.565

Twinning, Dislocations and Grain Size in NanoSPD Materials Determined by X-Ray Diffraction
p.571

Microstructure and Mechanical Properties of Commercial Purity HIPed and Crushed Aluminum
p.579

Texture and Grain Boundary Character Distribution during Equal Channel Angular Extrusion of some Two-Phase Copper Alloys
p.585

Microstructure Development and Precipitation Effects in Ultra Fine Grained Mg-3Tb-2Nd Alloy Prepared by High Pressure Torsion
p.591

Tensile Property of Submicrocrystalline Pure Fe Produced by HPT-Straining
p.597

HomeMaterials Science ForumMaterials Science Forum Vols. 584-586Twinning, Dislocations and Grain Size in NanoSPD...

Twinning, Dislocations and Grain Size in NanoSPD Materials Determined by X-Ray Diffraction

Abstract:

High resolution X-ray line profile analysis is sensitive to crystallite size, dislocation densities and character, and to planar defects, especially stacking faults or twinning. The different effects of microstructure features can be evaluated separately on the basis of the different corresponding profile functions and the different hkl dependences of line broadening. Profiles of faulted crystals consist of sub-profiles broadened and shifted according to different hkl conditions. The systematic analysis of the breadts and shifts of sub-profiles enables X-ray line profile analysis by using defect related profile functions corresponding to: (i) size, (ii) strain and (iii) planar faults, respectively. It is shown that twinning can either be enhanced or weakened by severe plastic deformation.