Investigation of indentation-, impact- and scratch-induced mechanically affected zones in a copper single crystal

Pierre Juran , Pierre-Jacques Liotier (1, 2, 3) , Claire Maurice (2, 3, 4) , Frederic Valiorgue (5) , Guillaume Kermouche (4, 2, 3)

1 MPE-ENSMSE - Département Mécanique et Procédés d'Elaboration
2 SMS-ENSMSE - Centre Science des Matériaux et des Structures
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 PMM-ENSMSE- Département Physique et Mécanique des Matériaux
5 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

Many nanomechanical testings and surface mechanical treatments—burnishing, shot peening...—are based upon contact phenomena such as indentation, impact and scratch loadings. In this paper, the Mechanically Affected Zone (MAZ) induced by these standard contact loadings applied on a single crystal copper is investigated. We assume that the MAZ can be characterized by the lattice misorientation measured using backscattering electron diffraction. With the help of a Finite-Element analysis, it is shown that crystal plasticity theory can estimate with enough accuracy the lattice misorientation pattern. Experimental results highlight that the MAZ size is always related to the residual imprint dimension and its shape depends strongly on the kind of loading.

Keywords: Indentation; Scratch; Micro-impact; EBSD; Crystal plasticity; Finite-element analysis; Surface mechanical treatment; Lattice misorientation; TRIBOLOGICALLY TRANSFORMED STRUCTURE; CENTERED-CUBIC CRYSTALS; STRESS-STRAIN CURVES; SHOT PEENING PROCESS; RESIDUAL-STRESSES; SURFACE INTEGRITY; HARDENED STEEL; PLASTICITY; METALS; DEFORMATION

Domains: Materials

Pierre Juran, Pierre-Jacques Liotier, Claire Maurice, Frederic Valiorgue, Guillaume Kermouche. Investigation of indentation-, impact- and scratch-induced mechanically affected zones in a copper single crystal . Comptes Rendus Mécanique, 2015, 343 (5-6), pp.344-353. ⟨10.1016/j.crme.2015.03.003⟩. ⟨emse-01352766⟩