Abstract
In order to investigate strain burst behavior of planar slip materials, single crystals of Cu-15.3at.%Al alloys, oriented for easy glide, were cyclically deformed under load and strain control. A huge strain burst ( γ p = 0.12) observed in a load-controlled fatigue test is related to easy-glide behavior after yielding. Strain bursts under strain control proceeded through the crystal in a stepwise manner because the total strain is strictly controlled by a closed-loop system. The experimental observation that each strain burst is accompanied by the sudden appearance of a slip band indicates that they are caused by a sudden activation of dislocation sources. Strain burst behavior at various strain amplitudes is also discussed in relation to deformation behavior in load-controlled fatigue tests and monotonic tests. A positive asymmetry (a higher stress in tension) in this study is caused by strain bursts occurring more frequently and more easily during compression-behaviour which results from easier cross-slip and a higher mobility of dislocations during compression.
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.
