Abstract
Behavior of the interfacial crack which grew parallel to the loading axis under cyclic loading in a CoNiCrAIY coated Ni-base superalloy coating was investigated. The result wascompared with that of the opening type of crack. It was shown that the former type of crack revealed different behavior from the latter. The observation of the path of the former type of crack indicated that the contact stress acting on the crack plane played an essential role. Discussion was made on the frictional force, based on Interface mechanics.
