**3.3 Other aluminum alloy**

In the present work, various other aluminum alloys such as Al-23 mass% Si alloy, Si-whisker/extra super duralumin composite, etc., were studied for processing by

**Part 2** 

**Welding of Aluminium Alloys** 

RD-ECAP. In the case of Al-23 mass% Si alloy, absorbed energy of a sample processed 32 passes was about 18 times higher than that of a sample processed 0 pass. In the case of Si-whisker/extra super duralumin composite, after pressing by RD-ECAP for 10 passes, grain size was 1.5-2 μm and Si-whisker distribution became homogeneous. Also, Mg alloys and titanium processed by RD-ECAP were studied and the results confirmed that RD-ECAP is useful for forming fine-grained light metal materials.
