Void growth via dislocation pileup impingement on grain boundary
نویسندگان
چکیده
The effect of edge dislocations, impinging on grain boundary in fcc Fe near a preexisting void the volume this void, was studied using MD simulation. It found that virtually unlimited growth via mechanism is possible under certain conditions. To best our knowledge first atomistic simulation study, demonstrating feasibility mechanism.
منابع مشابه
Void growth by dislocation emission
Laser shock experiments conducted at an energy density of 61 MJ/m revealed void initiation and growth at stress application times of approximately 10 ns. It is shown that void growth cannot be accomplished by vacancy diffusion under these conditions, even taking into account shock heating. An alternative, dislocation-emission-based mechanism, is proposed for void growth. The shear stresses are ...
متن کاملResponse to “Shear Impossibility—Comments on ‘Void Growth by Dislocation Emission’ and ‘Void Growth in Metals’”
We thank the authors of Ref. [1] for their comments and interest in our work [2–6]. We agree that the emission of shear loops on one single shear plane cannot lead to void growth. However, our simulations suggest that coordinated shear on non-parallel planes can lead to void growth/shrinkage [3–5]. Detailed descriptions of this process are still being worked out and represent an exciting area f...
متن کاملShear impossibility: Comments on “Void growth by dislocation emission” and “Void growth in metals: Atomistic calculations”
Recently it was proposed that voids in crystals could grow by emission of shear dislocation loops [V.A. Lubarda, M.S. Scheider, D.H. Kalantar, B.A. Remington, M.A. Meyers, Acta Materialia 52 (2004) 1397–1408]. Even more recently, this proposal was ostensibly supported by molecular simulations of voids in strained single crystals [S. Traiviratana, E.M. Bringa, D.J. Benson, M.A. Meyers, Acta Mate...
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ژورنال
عنوان ژورنال: Materials Letters
سال: 2021
ISSN: ['1873-4979', '0167-577X']
DOI: https://doi.org/10.1016/j.matlet.2021.129542