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When the effect of the strain on solids is discussed, normally the explanation is the following: increasing stress, first point defects created, then dislocations, then plastic deformation starts, etc. I am trying to find papers (books) where first step is discussed in details.

Surprisingly, it is not that simple: there are lot of papers (including very recent) where using MD methods the energies of defect creation is calculated. However, very few discuss what happens when significant (comparable with one where destruction starts) strain is applied.

Could someone help me to find a good reference?

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You'll find much on this topic in a technical library.

This classic text is a complete treatise on the concept of dislocations and their interactions with various other defects in crystalline materials.

Theory of Dislocations

John Price Hirth, Jens Lothe

If entirely new to the field see:

Elementary Dislocation Theory

Johannes Weertman, Julia R. Weertman

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I'll take a look, but the titles make me think that not much about point defects is discussed there. – Misha Jan 9 '13 at 20:27
The non-conservative motion of dislocations drives the formation/destruction of point defects at dislocation jogs. – Mark Rovetta Jan 9 '13 at 20:58
I am interested in the regime when no dislocations appear in the system. And no, there are no dislocations in the system. At least, their number is negligible. – Misha Jan 10 '13 at 21:16

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