Abstract
Abstract A connecting rod from a motor boat was broken in two places at the small end. At position I there was a fatigue fracture brought about by operational stress, whereas the fibrous fracture surface II was a secondary tensile fracture. Furthermore the transition on the other side of the rod was cracked symmetrically to the fatigue fracture (position III). Magnetic inspection showed indications of cracking at the transition between the rod and small end in six other connecting rods from the same batch. Metallographic investigation showed the connecting rods were rendered susceptible to fatigue by the notch effect of coarse scale-filled folds formed during forging.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.