Cast Irons Lab Report
Object
To compare the tensile strengths, moduli of elasticity of cast irons and investigate their microstructure.
Method: Part One
Measure the dimensions of the specimens and calculate the cross-sectional area. Specimens will be tested on the Tinius Olsen and Lloyds tensometers, which will produce graphs of load/extension. Calculate the ultimate tensile strengths and moduli of elasticity of the grey cast iron and Spheroidal graphite (SG) cast iron.
Method: Part Two
Several cast iron specimens will be available for microscopic examination. Sketch the structures, noting any phases present or observations. Label each drawing.
Health & Safety
Follow normal laboratory rules.
Discussion & Further Reading
- Compare the strengths of the materials. Also observe the failure in terms of brittleness and ductility.
- Describe the presence of carbon in cast irons and the problems associated with its different forms.
- What are the different categories of irons and what are their applications in today’s industries?
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