For mechanical drive steam turbines, the investigation results of corrosion fatigue phenomena in the transient zone are introduced, including basic phenomena on expansion line and actual design and damage experience. These results were analyzed from the standpoint of stress intensity during the start of cracking. In order to resolve such problems, preventive coating and blade design methods aga...

Laminar corrosion defects, such as intergranular penetrations and stress corrosion cracks, are common in ageing aircraft. These defects are most commonly found in extruded and rolled sections made from high strength aluminium alloys; typical examples include wing and tailplane spar caps in widespread use in ageing aircraft. They present a significant problem in that the assessment of their sign...