Abstract
Considerable attention is being devoted, for the last few years, to intermetallic compounds as alternative materials for possible structural applications. However, because the principal motivations for the study of various intermetallics have been focused on developing the materials and analyzing the material characteristics, very poor discussion have been made for the machinability. In this paper, the machinability of Ni3Al-based intermetallics is evaluated in turning operations. Tool life tests are first conducted to investigate adaptability of the tool materials by assessing the tool life curves. From the test results, CBN tools shows the longest tool life characteristics among the other tested materials. Then the effets of the usage of coolant and the compulsory cooling of Ni3A-based workpieces on improving the machinability are discussed. Although coolant secures the improvement of machinability, no significant effects can be obtained by enforced cooling of the Ni3Al-based workpiece.
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