Fundamental factors on formation mechanism of dislocation arrangements in cyclically deformed fcc single crystals

Li, P.; Li, S.X.; Wang, Z.G.; Zhang, Z.F.

doi:10.1016/j.pmatsci.2010.12.001

Cited by 248 publications

(82 citation statements)

References 142 publications

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“…3b. It is well-known that matrix veins form in the early stage of cyclic deformation and with cyclic deformation, the dislocation ladders appear 31,32 . There are already some dislocation ladders formed near the TB while it still exhibits as dislocation patches in the grain interior far away from the TB which is also an indication of strain localization.…”

Section: Sem and Ecc Results Of Bicrystal With A Perpendicular Tbmentioning

confidence: 99%

Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

Zhang

et al. 2014

Nat Commun

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Section: Sem and Ecc Results Of Bicrystal With A Perpendicular Tbmentioning

confidence: 99%

Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

Zhang

et al. 2014

Nat Commun

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“…[35] Additionally, the nature of planar slip in the materials with low SFE and SRO will facilitate reducing the strain localizations as well. [36] In light of the causality between the fatigue cracks and the shear bands, prominently improved shear banding behavior can conduce to strengthen the fatigue cracking resistance. As mentioned above, b in the Basquin equation, another vital ingredient in principle to dominate the fatigue strength, plays a crucial role in bridging fatigue strength, microstructures and fatigue damage mechanisms in microscale.…”

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confidence: 99%

Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

Lin

Sheng

et al. 2015

Materials Research Letters

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“…Taking stacking fault energy as the criterion [18][19][20][21], the following facts can be clarified. Firstly, all of pure metals belong to wavy slip materials [22,23], but fatigued dislocation patterns are a bit different from each other.…”

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Basic criterion for the formation of self-organized dislocation patterns in fatigued FCC pure metals

Zhongguang

Zhang

2015

Sci. China Mater.

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tively proposed based on stacking fault energy (SFE).As shown in Fig. 1, PSB ladders or walls are a three-dimensional structure. PSB ladders from t he (12 − 1) plane or PSB walls from the (111) plane occupy about 10% of the PSBs by volume. The walls are 0.03-0.25 μm in thickness with a spacing of about 1.3 μm (see Fig. 2) and they consist of numerous dipoles, especially faulted dipole. The socalled faulted dipole consists of four Shockley partial dislocations and three stacking faults. Th e stair-rods lie at the ends of the stacking fault in the secondary slip plane and their relative position are thus fixed. The dipole as a whole can assume an S-or Z-shaped configuration depending on the position of the Shockley partials. In 1976, Antonopoulos et al. [11,12] pointed out that the matrix vein contained both primary edge dipole and faulted dipole, however, the PSBs were almost full of faulted dipoles, which reflected the microstructure evolution of dislocation patterns. On Based on a large number of experimental results available, it is found that not all the fatigued face-centered-cubic (FCC) pure metals can form the classical persistent slip band (PSB)-ladder structure. The formation of the regular dislocation patterns, especially the PSB ladders, follows one unified principle on the dislocation aggregation and evolution. According to the principle, a simple criterion based on stacking fault energy is proposed to judge whether or not the regular PSB ladders in different FCC pure metals can form.

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Fundamental factors on formation mechanism of dislocation arrangements in cyclically deformed fcc single crystals

Cited by 248 publications

References 142 publications

Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

Basic criterion for the formation of self-organized dislocation patterns in fatigued FCC pure metals

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