Abstract
The effect of the tensile stress under electric pulse heat treatment on formation of the crystal structure in amorphous rapidly hardened Ti 50 Ni 25 Cu 25 alloys is studied Amorphous ribbons are subjected to a 10-msec electric pulse treatment in a free condition and under a tensile stress of 5.9 and 29.7 MPa. The structure of the specimens is investigated by optical and scanning electron microscopy, energy dispersive analysis and differential scanning calorimetry. It is shown that the crystallization in the amorphous ribbons under the electric pulse treatment with tensile load occurs primarily due to growth of surface columnar crystals from the surface of the ribbon into the depth and then from the internal part of the ribbon due to formation and growth of spherulites
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