Abstract
New analysis provides insight into the basis of power-law breakdown (PLB) in the steady-state creep of metals and alloys. A variety of theories has been presented in the past but this new examination suggests that there is evidence that a dramatic supersaturation of vacancies leading to very high diffusion rates and enhanced dislocation climb is associated with the rate-controlling process for creep in PLB. The effect of vacancy supersaturation may be enhanced by dislocation short circuit diffusion paths at lower temperatures due to the dramatic increase in dislocation density.
Highlights
Steady-state deformation of a material occurs when there is a balance between hardening and dynamic recovery
For constant strain-rate testing, the stress is fixed during steady-state, and for constant stress tests, the strain rate is fixed at steady-state
It is usually assumed that the five power-law creep is controlled by dislocation climb
Summary
Steady-state deformation of a material occurs when there is a balance between hardening and dynamic recovery. Metals 2019, 9, 1345; doi:10.3390/met9121345 www.mdpi.com/journal/metals as five-power–law-creep PLB including in Qfrom c, the four to seven have been observed This regime of a constant stress exponent is often referred to activation energy for creep, with temperature and stress by the hyperbolic sine function [1,3]. Discussion longer constant with changes in stress and increases with increasing stress/strain-rate This behavior is referred to as power-law breakdown (PLB).
Sign-in/Register to view highlights & summary 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.
