Abstract
It is visualized that dislocations move in a straight-line manner in polycrystalline structures and that trans-grain dislocation movement occurs from the yield point to the ultimate tensile stress. Some fracture modes in the uniaxial tensile test are illustrated in order to explain that after the ultimate point the grains deform by twins and the rotations of grains make cracks at the grain-boundaries due to incompatibility. Lüders banks, which propagate along the axis of the specimen, are twin bands which are formed by rearrangement of the atoms within the structure of three-dimensional crystallizing π-bondings. The fatigue limit can be found through the rolling-back motion of the atoms during elastic deformation in the uniaxial tensile test, brought about by the change of the gradient.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
