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http://dx.doi.org/10.5781/KWJS.2007.25.3.051

Intermetallic Compounds Behavior at Laser Overlay Interface of Aluminum and Fe-based Powder  

Kang, Nam-Hyun (Department of Materials Science and Engineering, Pusan National University)
Yoo, Yeon-Gon (R&BD Center, Shinhan Diamond Inc.)
Lee, Chang-Woo (Advanced Joining Technology Team, KITECH)
Kim, Jeong-Han (Advanced Joining Technology Team, KITECH)
Publication Information
Journal of Welding and Joining / v.25, no.3, 2007 , pp. 51-56 More about this Journal
Abstract
A $CO_2$ laser overlay was conducted by using a Fe-based powder on the AC2B aluminum substrate. Cracks and intermetallic compounds (IMC) were observed inconsistently along the interface between the overlay and post-molten layer. A scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) detected some Fe-rich IMC ($Fe_3Al$, FeAl) as well as the brittle Al-rich IMC ($Fe_2Al_5,\;FeAl_3$). Micro vickers hardness proved the formation of Al-rich IMC ($FeAl_3$) along the interface by showing HV0.1 $800{\sim}900$. Furthermore, nano indentation was successfully applied to investigate the behavior of IMC more precisely than the micro vickers hardness.
Keywords
$CO_2$ laser; Overlay; Fe-Al intermetallic compound; Interface; Micro vickers hardness; Nano indentation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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