In materials science, a Frank–Read source is a mechanism explaining the generation of multiple dislocations in specific well-spaced slip planes in crystals when they are deformed. When a crystal is deformed, in order for slip to occur, dislocations must be generated in the material. This implies that, during deformation, dislocations must be primarily generated in these planes. Cold working of metal increases the number of dislocations by the Frank–Read mechanism. Higher dislocation density increases yield strength and causes work hardening of metals.
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| - Frank–Read source (en)
- Sorgente di Frank-Read (it)
- Mécanisme de Frank et Read (fr)
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| - Una sorgente di - è stata teorizzata per spiegare il fenomeno macroscopico dell'incrudimento durante la dei materiali, e in generale in regime plastico. Si tratta di una sorgente di dislocazioni nei piani di scorrimento, che compare quando il materiale è sottoposto ad uno sforzo di taglio. (it)
- In materials science, a Frank–Read source is a mechanism explaining the generation of multiple dislocations in specific well-spaced slip planes in crystals when they are deformed. When a crystal is deformed, in order for slip to occur, dislocations must be generated in the material. This implies that, during deformation, dislocations must be primarily generated in these planes. Cold working of metal increases the number of dislocations by the Frank–Read mechanism. Higher dislocation density increases yield strength and causes work hardening of metals. (en)
- Le mécanisme de Frank et Read, également appelé moulin de Frank-Read, est un mécanisme de multiplication de dislocations intervenant dans la déformation plastique. Il permet d'expliquer comment la déformation plastique est possible alors que les cristaux contiennent peu de dislocations après solidification, ainsi que le durcissement par écrouissage. Il a été proposé par les physiciens Frederick Charles Frank (britannique) et (américain). (fr)
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| - In materials science, a Frank–Read source is a mechanism explaining the generation of multiple dislocations in specific well-spaced slip planes in crystals when they are deformed. When a crystal is deformed, in order for slip to occur, dislocations must be generated in the material. This implies that, during deformation, dislocations must be primarily generated in these planes. Cold working of metal increases the number of dislocations by the Frank–Read mechanism. Higher dislocation density increases yield strength and causes work hardening of metals. The mechanism of dislocation generation was proposed by and named after British physicist Charles Frank and . (en)
- Le mécanisme de Frank et Read, également appelé moulin de Frank-Read, est un mécanisme de multiplication de dislocations intervenant dans la déformation plastique. Il permet d'expliquer comment la déformation plastique est possible alors que les cristaux contiennent peu de dislocations après solidification, ainsi que le durcissement par écrouissage. Il a été proposé par les physiciens Frederick Charles Frank (britannique) et (américain). 1.
* Les dislocations sont épinglées (par des défauts ponctuels, des précipités ou d'autres dislocations normales au plan de mouvement) ; 2.
* Les parties épinglées restent fixes, les parties mobiles s'étendent autour de l'épinglage ; 3.
* Lorsque les parties mobiles se rejoignent, cela forme une boucle de dislocation qui bouge (s'étend) librement tandis que la partie épinglée recommence le cycle. (fr)
- Una sorgente di - è stata teorizzata per spiegare il fenomeno macroscopico dell'incrudimento durante la dei materiali, e in generale in regime plastico. Si tratta di una sorgente di dislocazioni nei piani di scorrimento, che compare quando il materiale è sottoposto ad uno sforzo di taglio. (it)
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