Corrosion fatigue

As if fatigue itself were not a complicated enough type of failure, it is further complicated by the addition of a corrosive environment. Corrosion fatigue is the combined simultaneous action of repeated or fluctuating stress and a corrosive environment to produce surfaceorigin fatigue cracking. In one sense, all fatigue fractures should be considered as corrosion fatigue fractures, for the action of the environment within the fatigue crack is critical to the success or failure of the part involved. The fatigue strength of a part or metal in' an inert environment, where there is no corrosion, is higher than that of the same part in an aggressive environment where corrosion may play a significant role. - Internet Partner
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