scholarly journals Critical operating stress of persistent slip bands in Cu

2019 ◽  
Vol 165 ◽  
pp. 114-120 ◽  
Author(s):  
M. Dodaran ◽  
M.M. Khonsari ◽  
S. Shao
Keyword(s):  
Slip Bands ◽  
Persistent Slip Bands ◽  
Operating Stress

Formation of Persistent Slip Band in Fatigued Copper Single Crystals

1982 ◽  
Vol 40 ◽  
pp. 470-471
Author(s):  
N. Y. Jin
Keyword(s):  
Volume Fraction ◽  
Fatigue Cracks ◽  
Wall Structure ◽  
Matrix Structure ◽  
Dislocation Dipole ◽  
Slip Bands ◽  
Persistent Slip Bands ◽  
The Matrix ◽  
Hard Shell ◽  
Copper Single Crystals

Localised plastic deformation in Persistent Slip Bands(PSBs) is a characteristic feature of fatigue in many materials. The dislocation structure in the PSBs contains regularly spaced dislocation dipole walls occupying a volume fraction of around 10%. The remainder of the specimen, the inactive "matrix", contains dislocation veins at a volume fraction of 50% or more. Walls and veins are both separated by regions in which the dislocation density is lower by some orders of magnitude. Since the PSBs offer favorable sites for the initiation of fatigue cracks, the formation of the PSB wall structure is of great interest. Winter has proposed that PSBs form as the result of a transformation of the matrix structure to a regular wall structure, and that the instability occurs among the broad dipoles near the center of a vein rather than in the hard shell surounding the vein as argued by Kulmann-Wilsdorf.

Fatigue hardening and nucleation of persistent slip bands in copper

1982 ◽  
Vol 30 (3) ◽  
pp. 711-718 ◽  
Author(s):  
O.B Pedersen ◽  
A.T Winter
Keyword(s):  
Slip Bands ◽  
Persistent Slip Bands

Fatigue life prediction of structural steel using acoustic birefringence and characteristics of persistent slip bands

2021 ◽  
Author(s):  
Alexander Victorovich Gonchar ◽  
Konstantin Vladimirovich Kurashkin ◽  
Olga Vyacheslavovna Andreeva ◽  
Maxim Sergeevich Anosov ◽  
Vyacheslav Alexandrovich Klyushnikov
Keyword(s):  
Fatigue Life ◽  
Structural Steel ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Slip Bands ◽  
Persistent Slip Bands ◽  
Acoustic Birefringence

Surface Relief Formation in Relation to the Underlying Dislocation Arrangement

2016 ◽  
Vol 258 ◽  
pp. 526-529 ◽  
Author(s):  
Veronika Mazánová ◽  
Milan Heczko ◽  
Ivo Kuběna ◽  
Jaroslav Polák
Keyword(s):  
Electron Microscopy ◽  
Dislocation Structure ◽  
Fatigue Crack Initiation ◽  
Surface Profile ◽  
Specimen Surface ◽  
Slip Bands ◽  
Transmission Electron ◽  
Persistent Slip Bands ◽  
Relief Formation ◽  
Cyclic Slip

Two fatigued materials with f.c.c. lattice, i.e. pure polycrystalline copper and austenitic Sanicro 25 stainless steel, were subjected to the study of the persistent slip markings (PSMs) developed on the surface of the suitably oriented grains. They were observed using scanning electron microscopy (SEM) and thin surface FIB lamellae were prepared and studied by transmission electron microscopy (TEM). The aim was to correlate the specimen surface profile with the underlying internal dislocation structure. The localization of the intensive cyclic slip into persistent slip bands (PSBs) of the material was observed and associated with the PSMs on the specimen surface. Extrusions, intrusions and the dislocation structure appertaining to them were analysed, documented and discussed in relation to the models of fatigue crack initiation.

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