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http://dx.doi.org/10.7777/jkfs.2013.33.3.122

The Study of Heat Resistant Aluminum Alloy with CrW Homogeneous Solid Solution  

Kim, Jin-Pyeong (Metal Materials & Processing Engineering Center, Korea Automotive Technology Institute)
Sung, Si-Young (Metal Materials & Processing Engineering Center, Korea Automotive Technology Institute)
Han, Beom-Suck (Metal Materials & Processing Engineering Center, Korea Automotive Technology Institute)
Kim, Sang-Ho (School of Energy.Materials.Chemical Engineering, Korea University of Technology and Education)
Publication Information
Journal of Korea Foundry Society / v.33, no.3, 2013 , pp. 122-126 More about this Journal
Abstract
Recently, heat-resistant aluminum alloy has been re-focused as a downsizing materials for the internal combustion engines. Heat-resistant Al alloy development and many researches are still ongoing for the purpose of improving thermal stability, high-temperature mechanical strength and fatigue properties. The conventional principle of heat-resistant Al alloy is the precipitation of intermetallic compounds by adding a variety of elements is generally used to improve the mechanical properties of Al alloys. Heat resistant aluminum alloys have been produced by CrW homogeneous solid solution to overcome the limit of conventional heat resistant aluminum alloy. From EPMA, it is found that CrW homogeneous soild solution phases with the size of $50-100{\mu}m$ have been dispersed uniformly, and there is no reaction between aluminum and CrW alloy. In addition, after maintaining at high temperature of 573 K, there is no growth of hardening phase, nor desolved, but CrW still exists as a homogeneous solid solution.
Keywords
Heat resisting aluminium alloy; Homogeneous solid solution; Solid solution strengthening; Dispersion strengthening; Casting Al alloy;
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