Browsing by UP Author "Chalimba, Stephen Akonda"

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Effects of roughing on finish rolling simulations in microalloyed strip steels

Chalimba, Stephen Akonda; Mostert, Roelf Johannes; Stumpf, Waldo E.; Siyasiya, Charles Witness; Banks, K.M. (Kevin) (Springer, 2017-11)

Please read abstract in the article.
Modeling of high-temperature flow stress of VN and Nb-Ti microalloyed steels during hot compressive deformation

Chalimba, Stephen Akonda; Mostert, Roelf Johannes; Stumpf, Waldo E.; Siyasiya, Charles Witness; Banks, K.M. (Kevin) (Springer, 2020-01)

A simple mathematical model has been developed which describes the flow curve behavior up to the peak true stress or a true strain of 0.6 in unstable austenite. The hot working behavior was analyzed by compression tests ...
Modeling of work hardening during hot rolling of vanadium and niobium microalloyed steels in the low temperature austenite region

Chalimba, Stephen Akonda; Mostert, Roelf Johannes; Stumpf, Waldo E.; Siyasiya, Charles Witness; Banks, K.M. (Kevin) (Springer, 2017-11)

This work extends the application of the well-established Estrin and Mecking (EM) work-hardening model in unstable low temperature austenite region. The interaction between work hardening, recovery and softening attributed ...

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