Surface relief and its relation to the crystallographic orientation in fatigued copper single crystals

Citation
J. Man et al., Surface relief and its relation to the crystallographic orientation in fatigued copper single crystals, KOVOVE MAT, 38(5), 2000, pp. 339-353
Citations number
28
Categorie Soggetti
Material Science & Engineering
Journal title
KOVOVE MATERIALY-METALLIC MATERIALS
ISSN journal
0023432X → ACNP
Volume
38
Issue
5
Year of publication
2000
Pages
339 - 353
Database
ISI
SICI code
0023-432X(2000)38:5<339:SRAIRT>2.0.ZU;2-1
Abstract
Surface relief of cylindrical copper single crystals oriented for single sl ip and cyclically strained in plastic strain control up to fracture was stu died using Philips 505 scanning electron microscope and interference light microscope. Both individual persistent slip bands (PSBs) and persistent sli p macrobands (PSMs) were observed. Their length, width and height were dete rmined in dependence on the position on the specimen surface. The PSMs heig ht was found to depend strongly on the orientation of a surface normal with respect to the primary slip direction. Protrusions grow exclusively in the direction of the Burgers vector of the primary dislocations without appare nt influence of the secondary slip. The height of PSMs is proportional to t heir width and increases with their length measured in the active slip dire ction and with cumulative plastic strain amplitude in PSBs.