Modelling and simulation of local mechanical properties of high silicon solution-strengthened ferritic compacted graphite iron

• This study focuses on the modelling and simulation of local mechanical properties of compacted graphite iron cast at different section thicknesses and three different levels of silicon, ranging from about 3.6% up to 4.6%. The relationship between tensile properties and microstructure is investigated using microstructural analysis and statistical evaluation. Models are generated using response surface methodology, which reveal that silicon level and nodularity mainly affect tensile strength and 0.2% offset yield strength, while Young′s modulus is primarily affected by nodularity. Increase in Si content improves both the yield and tensile strength, while reduces elongation to failure. Furthermore, mechanical properties enhance substantially in thinner section due to the high nodularity. The obtained models have been implemented into a casting process simulation, which enables prediction of local mechanical properties of castings with complex geometries. Very good agreement is observed between the measured and predicted microstructures and mechanical properties, particularly for thinner sections.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

casting process simulation

Compacted graphite iron

materials characterisation

solution-strengthened ferrite

tensile properties

Cast iron

Casting

Ferrite

Ferritic steel

Graphite

Iron

Iron compounds

Mechanical properties

Microstructure

Silicon

Local mechanical properties

Microstructures and mechanical properties

Properties and microstructures

Response surface methodology

Yield and tensile strength

Tensile strength

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)