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Title: Plastic strain arrangement in copper single crystals in sliding

Deformation of tribologically loaded contact zone is one of the wear mechanisms in spite of the fact that no mass loss may occur during this process. Generation of optimal crystallographic orientations of the grains in a polycrystalline materials (texturing) may cause hardening and reducing the deformation wear. To reveal the orientation dependence of an individual gain and simplify the task we use copper single crystals with the orientations of the compression axis along [111] and [110]. The plastic deformation was investigated by means of optical, scanning electron microscopy and EBSD techniques. It was established that at least four different zones were generated in the course of sliding test, such as non-deformed base metal, plastic deformation layer sliding, crystalline lattice reorientation layer and subsurface grain structure layer. The maximum plastic strain penetration depth was observed on [110]-single crystals. The minimum stability of [111]-crystals with respect to rotation deformation mode as well as activation of shear in the sliding contact plane provide for rotation deformation localization below the worn surface. The high-rate accumulation of misorientations and less strain penetration depth was observed on [111]-crystals as compared to those of [110]-oriented ones.
Authors:
;  [1] ;  [2]
  1. National Research Tomsk State University, Tomsk, 634050, Russia and Tomsk State University of Architecture and Building, Tomsk, 634003 (Russian Federation)
  2. National Research Tomsk Polytechnic University, Tomsk, 634050, Russia and Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 (Russian Federation)
Publication Date:
OSTI Identifier:
22390456
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1623; Journal Issue: 1; Conference: International Conference on Physical Mesomechanics of Multilevel Systems 2014, Tomsk (Russian Federation), 3-5 Sep 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BACKSCATTERING; COMPARATIVE EVALUATIONS; COPPER; CRYSTAL LATTICES; DEFORMATION; ELECTRON DIFFRACTION; HARDENING; LAYERS; MONOCRYSTALS; PENETRATION DEPTH; PHASE STABILITY; PLASTICITY; POLYCRYSTALS; SCANNING ELECTRON MICROSCOPY; SHEAR; STRAINS; TEXTURE; WEAR