The porosity of die-cast aluminum alloys is a determining factor for the quality product. In this paper, we studied selected part AlSi9Cu3(Fe) compressor by computer tomography and metallography. case part, achievable resolution CT, non-destructive testing method, was 30 μm—this method could not detect smaller cavities. Based on metallographic analysis, percentage defects larger than μm ranges ...

Abstract The drawn arc stud welding is widely applied in steel construction, and its procedure can be qualified according to different standards by visual examinations practical destructive tests of the resulting joint. An evaluation material properties usually not requested particularly considering locally limited weld region. Nevertheless, there a need knowledge regarding complex press proces...

The National Transportation Safety Board coordinated with the Pipeline and Hazardous Materials to investigate November 16, 2017, rupture of Keystone Mainline number 1 crude oil pipeline operated by TransCanada Oil Operations, Incorporated. resulted from a fatigue crack that initiated near-surface cracks associated sliding contact damage at top pipe propagated failure within 7.4 years operation....