발간논문

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Vol.30, No.9, 1150 ~ 1153, 1992
Title
Large elongation Induced by Crystallization in an Amorphous Al88Y2Ni10 Alloy
김영환Yeong Hwan Kim, 김우열Woo Yeol Kim, 조형호Hyung Ho Jo, 정상 명구Akihisa Inoue, 증본 건Tsuyoshi Masumoto
Abstract
An Al_(88)Y₂Ni_(10) amorphus alloy was found to exhibit a Large elongation reaching about 30% in the low temperature range of 450 to 475K. The temperature range agrees well with that where a lot of the primary fcc-Al particles with a ultrafine grain size precipitate homogeneously. It is therefore concluded that the appearance of the large elongation is due to a crystallization-induced plasticity phenomenon. The new phenomenon may be interpreted to occur through the sequent process of inhomogeneous deformation along shear plane, followed by preferential precipitation of Al particles on the shear plane resulting from the deformation-induced increase in temperature and then propagation of the deformation site to other site resulting from the precipitation-induced strengthening in the deformed area.
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