Ana Alil

Influence of the initial length of the Cu bars on the structure and micro-hardness of friction-welded and open-die forged Al/Cu bimetallic bars

When the testing of large quantities of bimetallic joints of aluminium (Al) and copper (Cu) is considered, consumption of Cu, as a raw material, is of significant importance. For tensile testing of Al/Cu joints, it is recommended to produce joints by using a longer initial length of Cu bars, whereas for the examination of micro-structure or other properties of these joints, Cu bars of shorter lengths can be used. In order to introduce the lower consumption of Cu for the testing of larger quantities of Al/Cu joints, it is necessary to determine whether the usage of different initial lengths of Cu bars produces the same micro-structural effects in joints obtained by using the same processing parameters or not. In this study, micro-structures and micro-hardness profiles of Al/Cu bimetallic joints produced by using continuous drive friction welding and noticeably different initial length of Cu bars will be analyzed. Also, mentioned properties of these joints in the open-die forged condition will be examined.