Abstract
The purpose of this study is to improve the wear characteristics of Al7075 alloy, which is widely used as a material for aircraft parts. Ti, a high-hardness metal, was coated thinly on the surface of the Al7075 alloy using DC magnetron sputtering. Thin film coating was performed by configuring an orthogonal array according to design of experiments. Then the wear loss and the friction coefficient of the test piece were measured through an abrasion test. A prediction model that can improve the wear characteristics was derived, and it was shown to be valid. In addition, the characteristic of wear loss was remarkable when the wear surface showed comparatively clear abrasion pattern and also the grain of Ti thin film was bigger. When the wear surface showed irregular abrasion pattern and also the grain of Ti thin film was finer, the characteristic of coefficient of friction was remarkable.
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