Deformation and Fracture Mechanics of Engineering MaterialsUpdated to reflect recent developments in our understanding of deformation and fracture processes in structural materials. This completely revised reference includes new sections on isostress analysis, modulus of rupture, creep fracture micromechanicsms, and many more. |
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Page 67
... dislocation , the direction of movement of the screw dislocation is per- pendicular to b . To better visualize this fact , take a piece of paper and tear it partway across its width . Note that the movement of your hands ( the shear ...
... dislocation , the direction of movement of the screw dislocation is per- pendicular to b . To better visualize this fact , take a piece of paper and tear it partway across its width . Note that the movement of your hands ( the shear ...
Page 68
... screw dislocations . With b the same along the entire length of the dislocation , the dislocation is seen to be pure screw at A and pure edge at B. The reader should verify this by constructing a Burgers circuit around the dislocation ...
... screw dislocations . With b the same along the entire length of the dislocation , the dislocation is seen to be pure screw at A and pure edge at B. The reader should verify this by constructing a Burgers circuit around the dislocation ...
Page 81
... dislocation AB is parallel to the jog PP ' , the jog is of the screw type . Similarly , the jog QQ ' in dislocation XY is found also to be of the screw type . The screw jogs PP ' and QQ ' have greater mobility than the edge dislocations ...
... dislocation AB is parallel to the jog PP ' , the jog is of the screw type . Similarly , the jog QQ ' in dislocation XY is found also to be of the screw type . The screw jogs PP ' and QQ ' have greater mobility than the edge dislocations ...
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addition alloy aluminum alloy applied stress associated ASTM atoms behavior brittle ceramics Chapter Charpy component composite crack extension crack growth crack length crack tip craze creep rate crystal curve cyclic decrease depends determined dislocation ductility elastic embrittlement engineering example factor failure fiber FIGURE flaw fracture mechanics fracture surface fracture toughness given grain boundaries hardening hydrogen increasing initial KIEAC lattice load maraging steels martensite material material's matrix Metals Park microstructure microvoid modulus notch Note occur oriented parameter particles phase plane plane-strain plastic deformation plastic zone plate polymer polymeric region relative Reprinted with permission result rupture sample screw dislocation Section shear stress shown in Fig solid solution specimen stacking fault energy steel alloys strain rate stress concentration stress field stress intensity stress level stress-strain stress-strain curve superalloys tensile stress test temperature thermal thickness toughening Trans transition temperature twinning values yield strength