발간논문

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Vol.32, No.5, 573 ~ 583, 1994
Title
A Study on the Rolling Deformation and Preferred Orientations of Ni3Al Intermetallic compounds
홍대원Dae Won Hong, 박영구Young Ku Park
Abstract
The Purpose of this study is to investigate the rolling deformation and preferred orientation for Ni₃Al intermetallic compounds. The chemical compositions of the alloys used in this study are 75.7Ni-24Al-0.3B(Al alloy) and 78.8Ni-21Al-0.2B(A2 alloy). The preferred orientation has been characterized by plotting inverse pole figures and pole figures. The preferred orientations of Al alloy after cold rolling, are {110} $lt;111$gt; and {110} $lt;211$gt;, whereas A2 alloy has brass type orientation of {110} $lt;211$gt;. This alloy could be cold rolled soundly to 80% reduction without intermediate annealing. The microstructure of A2 alloy consists of the ordered γ´cells surrounded by disordered γ phases. Also dislocations were concentrated in the γ phase near the of γ´/γ interface. The improved workability of this alloy may be due to the γ phase located at Ni₃Al interface, which alleviates the grain boundary embrittlement.
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