Abstract
The Effect of Chromium Addition on Fluidity, Microstructure and Mechanical Properties of Aluminium LM6 Cast Alloy
Highlights
Aluminum alloys have been the primary material of choice for structural components of aircraft and automobile industry since about 1930
It is clear that Cr addition does not have significant effect on Si morphology as showed in Figure 2, that due to forming phase and modified Fe phase and reduce the quantity [13]
Microstructure Analysis The samples were mounted in resin and grounded with a series of progressively finer SiC paper size from 250 grit to
Summary
Aluminum alloys have been the primary material of choice for structural components of aircraft and automobile industry since about 1930 They are the overwhelming choice for the fuselage, wing, and supporting structure for commercial airliners and military cargo and transport due to their high ratio of strength to weight [1]. Aluminum alloys are used extensively due to their high strength to weight ratio, good machinability, corrosion resistance, optimum surface finish, and high electrical and thermal conductivity. They are characterized by their low specific gravity, low melting point, negligible gas solubility (with the exception of hydrogen), excellent castability and good corrosion resistance [2, 3]. Chromium is one of elements adding to most of Al –Mg-Si and Al-Mg –Zn groups, in which the amount added generally not exceeding 0.35% chromium in order to control grain structure, to prevent grain growth in Al-Mg alloys and to prevent recrystallization in Al-Mg-Si
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