Dislocation theory
Dislocation theory
Dislocation theory
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Forces between dislocations<br />
• <strong>Dislocation</strong>s of opposite sign on the same slip plane will<br />
attract each other, run together, and annihilate each other.<br />
• <strong>Dislocation</strong>s of alike sign on the same slip plane will repel<br />
each other<br />
The radial force F r between<br />
two parallel screw dislocations<br />
Fr = τ θz<br />
b<br />
2<br />
Gb<br />
=<br />
2πr<br />
…Eq. 7<br />
Parallel screw (same sign) +<br />
Aniparallel screw (opposite sign) -<br />
The radial and tangential<br />
forces between two parallel<br />
edge dislocations<br />
F r<br />
2<br />
Gb 1<br />
2π<br />
( 1−ν<br />
) r<br />
2<br />
Gb sin 2θ<br />
2π<br />
( 1−ν<br />
) r<br />
Suranaree University of Technology May-Aug 2007<br />
=<br />
Tapany Udomphol<br />
, F<br />
θ<br />
=<br />
…Eq. 8
Change language