A Comparative Study of Thermo-Mechanical Fatigue Performance of Different Grades of SiMo Nodular Cast Iron

This thesis is a comparative study of the Thermo-Mechanical Fatigue (TMF) performance of different grades of SiMo nodular cast iron for heavy-duty diesel engine exhaust gas manifold applications. The TMF performance of the current SiMo variant used to manufacture exhaust manifolds - SiMo 5.10 (C-3.25Si-4.45Mo-0.76), is compared with that of the...

Thermo-Mechanical Fatigue-Lifetime Determination of Diesel Engine Exhaust Manifolds

The start-up and shut-down cycling of a heavy-duty truck engine leads to temperature and mechanical strain variations in the exhaust manifold, subjecting it to thermo-mechanical fatigue (TMF) damage. For the automotive manufacturers, it is essential to accurately predict the TMF lifetimes of the exhaust manifolds under service conditions. The...