Elastic Interaction of Micropipes in Crystals

✍ Scribed by M.Yu. Gutkin; A.G. Sheinerman

• Book ID: 101371457
• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 172 KB
• Volume: 231
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200206)231:2<356::aid-pssb356>3.0.co;2-f

✦ Synopsis

The stress field, strain energy and interaction force are calculated for an isolated pair of straight parallel screw dislocations, one or both of which is (are) associated with (a) micropipe(s). The effect of the attraction of two dislocated micropipes (or a dislocated micropipe and a full-core screw dislocation) with Burgers vectors of the same sign is examined in detail. An analytical expression for the critical distance below which a dislocated micropipe attracts a fullcore screw dislocation is found. It is shown that two parallel dislocated micropipes with the same signs of the Burgers vectors may attract each other if the distance between the micropipes is small enough and the ratios of the micropipe radii and the Burgers vector magnitudes are sufficiently different. The stress field and strain energy of a dislocated micropipe near a planar free surface and the force of the interaction between the micropipe and the free surface are also found.