水轮机叶片有较大的工作应力、热影响区的晶粒粗大以及水介质的腐蚀性是产生机械腐蚀疲劳汽蚀的重要原因。
The larger tension stress in the hydraulic turbine blades, grain coarsening in the heat-affected zone and the causticity of fluid medium are the major causes of cavitation erosion.
对于钢桥，按照破坏形式对各类病害进行分类，主要有疲劳和脆性断裂、腐蚀、失稳以及机械损伤。
As for steel Bridges, the diseases can be classified into different kinds, which the important ones are fatigue and brittle failure, corrosion, buckling and mechanical failure.
在热压模缎中，模具失效的主要模式是腐蚀作用、热疲劳、机械疲劳和永久性即塑性变形。
In hot impression die forging, the principal modes of die failure are erosion, thermal fatigue, mechanical fatigue and permanent (plastic) deformation.
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