Cu<SUB>54</SUB>Ni<SUB>6</SUB>Zr<SUB>22</SUB>Ti<SUB>18</SUB> 벌크비정질 합금의 Nd:YAG 레이저 점용접 특성

Characteristics of the Nd:YAG laser Spot Welding in Cu<SUB>54</SUB>Ni<SUB>6</SUB>Zr<SUB>22</SUB>Ti<SUB>18</SUB> Bulk Metallic Glass Alloy

&nbsp;&nbsp;Weldability is largely dependent on the phase evolution and the microstructure of the weld. For the weld ability of the Cu&lt;SUB&gt;54&lt;/SUB&gt;Ni&lt;SUB&gt;6&lt;/SUB&gt;Zr&lt;SUB&gt;22&lt;/SUB&gt;Ti&lt;SUB&gt;18&lt;/SUB&gt; bulk metallic glass, the crystallization affects the sensitivity of the weld to the brittle failure.<BR>&nbsp;&nbsp;In order to suppress the irreversible crystallization, Nd:YAG laser welding was chosen. The pulsed Nd:YAG laser was irradiated onto the BMG plate and the effects of the pulse shape [peak power intensity and pulse duration time] on the crystallinity were evaluated.