Early stages of fatigue in copper single crystals

Very high cycle fatigue of copper: Evolution, morphology and locations of surface slip markings

“…Stanzl-Tschegg et al [10] observed parallel 14 nm-height slip bands at triple junctions after 1.05 Â 10 10 cycles at 45 MPa under fatigue at 20 kHz in similar copper as the present one. Basinski et al [34] detected very fine, closely-spaced parallel slip bands at low frequency tests on copper single-crystal but after very few number if cycles (lower than 10 and typically one quarter and one half cycles). More pronounced slip markings very rapidly appears to the detriment of the others, very similarly to what we observed in Fig.…”

“…15b. Basinski et al [34] concluded that the deformation associated with the fine slip bands is very homogeneous and probably took place in larger regions without any markings because of recoverable (reversible) slip. Besides, type III persistent slip markings morphology is not so far from the morphology of the so-called shear bands found in underaged alloys [35].…”

Shear localization in dynamic deformation of copper single crystals

“…From above values, the ASB spacing can be estimated by equations (6), (7) and (8) as listed in table 1.…”

“…SC-A is a typical single-slip oriented and after fatigue the dislocation patterns are two-phase structures, i.e. PSB ladders embedded in matrix veins [6][7][8], as shown in figure 3. [44].…”

“…The formation of PSBs in copper single crystals has been widely studied since 1950s [1][2][3][4][5]. The dislocation structures of PSBs are well understood nowadays [6][7][8]. The investigation on nucleation, growth and, sometimes, annihilation of the characteristic dislocation arrangements of PSBs has been the subject of recent experimental work [9][10][11][12][13][14][15][16][17][18].…”