Characterization of the built-up edge and the built-up layer in the machining process of AA7050 alloy

The built-up edge (BUE) and the built-up layer (BUL) are the most common adhesion effects that can take place in the metal machining processes. Surface finish quality and toot life can be negatively affected by BUL and BUE. This work reports the results of a study on the microstructural differences between BUL and BUE formed in AA7050 cutting processes. From this Study, it can be concluded that different mechanisms are the responsible of BUL and BUE. Thus, BUL and BUE cannot be considered as different forms of the same effect.