Abstract
The paper treats micro-mechanical modes of crack extension, classed as ‘cracking’ and ‘rupture’ processes. In ‘cracking’, a cleavage crack nucleus propagates when a critical local tensile stress is attained, the magnitude of the stress being determined by the microstructure. Models for crack propagation from carbides and from martensite/ bainite ‘packets’ are discussed. The ‘rupture’ processes involve the initiation and growth of voids, centred on second-phase particles. Coalescence may arise from ‘internal necking’ or ‘fast shear’ and the factors associated with these two modes are described. Consideration is also given to the ways in which microstructure may produce scatter in toughness values and in growth-rates under fatigue loading, where both cyclic and monotonic failure modes are significant.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
Disclaimer: 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.