INFLUENCE OF Al ON DUCTILITY IMPROVEMENT BY B IN Ni_3 Al ALLOYS
YANG Wenying;LU Fanxiu;ZHANG Shouhua University of Science and Technology Beijing
Cite this article:
YANG Wenying;LU Fanxiu;ZHANG Shouhua University of Science and Technology Beijing. INFLUENCE OF Al ON DUCTILITY IMPROVEMENT BY B IN Ni_3 Al ALLOYS. Acta Metall Sin, 1990, 26(5): 73-75.
Abstract The "order-disorder" model was adopted to calculate the lattice vacancy relatedto the composition change in Ni_3Al alloys. A great deal of vacancies, i. e., the non-stoichiome-tric vacancies, may exist in the Ni_3Al alloys containing Al over stoichiometry, saying, 25 at.-%.This was confirmed by the positron annihilation technique. Therefore, the influence of Al con-tent on the bettering behaviour of B towards the ductility of Ni_3Al alloys can be understoodthrough the interaction of non-stoichiometric vacancy and B atom.
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