Time filter

Source Type

Yu Z.-W.,Key Laboratory of Ship Machinery Maintenance & Manufacture | Yu Z.-W.,Dalian Maritime University | Xu X.-L.,Key Laboratory of Ship Machinery Maintenance & Manufacture | Xu X.-L.,Dalian Maritime University
Journal of Failure Analysis and Prevention | Year: 2015

Failure of any component in a vehicle, even a small part, may result in an out of control vehicle and possible catastrophic accident. In this paper, two case studies regarding the failure of truck diesel engine connecting-rods are presented. Fatigue is the dominant failure mode of the two connecting-rods. The occurrence of an abnormal load in operation and the presence of a thick decarburization layer on the external surface of the rod-body are, respectively, responsible for the fatigue failure of the two connecting-rods. © 2015, ASM International.


Yu Z.-W.,Key Laboratory of Ship Machinery Maintenance & Manufacture | Xu X.-L.,Key Laboratory of Ship Machinery Maintenance & Manufacture
Journal of Failure Analysis and Prevention | Year: 2014

Cracks were found in the weld metal (WM) of weld-section of side shell of drilling-well oil storage ship when performing post weld radiographic examination. The cracks were subjected to detailed metallographic analysis and the fracture surfaces were observed visually and using SEM. The results indicate that the cracks were embedded in middle of multiple beads of WM. The fracture surface reveals the dendritic solidification structure of WM, which contains impurity element sulfur and other alloy elements (Ti, Al, and O) originating from the filler core of welding wire. The embedded cracks are a type of weld hot crack, the solidification crack. The failure mechanism is identified to be welding hot cracking. © 2014, ASM International.

Loading Key Laboratory of Ship Machinery Maintenance & Manufacture collaborators
Loading Key Laboratory of Ship Machinery Maintenance & Manufacture collaborators