dc.contributor.author |
Maube, Shem |
|
dc.contributor.author |
Obiko, Japheth |
|
dc.contributor.author |
Josias Van der Merwe |
|
dc.contributor.author |
Klenam, Desmond |
|
dc.contributor.author |
Mwema, Fredrick Madaraka |
|
dc.contributor.author |
Bodunrin, Michael |
|
dc.date.accessioned |
2023-03-03T06:11:15Z |
|
dc.date.available |
2023-03-03T06:11:15Z |
|
dc.date.issued |
2023-02-28 |
|
dc.identifier.citation |
Maube, S.; Obiko, J.; Van der Merwe, J.; Klenam, D.; Mwema, F.M.; Bodunrin, M. Comparative Study on Hot Metal Flow Behaviour of Virgin and Rejuvenated Heat Treatment Creep Exhausted P91 Steel. Preprints 2023, 2023020502. https://doi.org/10.20944/preprints202302.0502.v1. |
en_US |
dc.identifier.uri |
https://doi.org/10.20944/preprints202302.0502.v1 |
|
dc.identifier.uri |
http://repository.dkut.ac.ke:8080/xmlui/handle/123456789/7904 |
|
dc.description.abstract |
This article reports on the comparative study of the hot deformation behaviour of virgin (steel A) and rejuvenated heat treatment creep-exhausted (steel B) P91 steels. Hot uniaxial compression tests were conducted on the two steels at the deformation temperature range of 900°C-1050°C and a strain rate range of 0.01-10s-1 to 0.6 strain using Gleeble® 3500 equipment. The results showed that the flow stress largely depends on the deformation conditions. The flow stress for the two steels increased with an increase in strain rate at a given deformation temperature and vice versa. The flow stress-strain curves exhibited a dynamic recovery as the softening mechanism. The material constants determined using Arrhenius constitutive equations were: stress exponent was: steel A (5.76) and steel B (6.67), and the apparent activation energy was: steel A (473.1 kJ mol-1) and steel B (564.5 kJmol-1). From these results, steel A exhibited better workability than steel B. Statistical parameters analyses showed that the flow stress for the two steels had a good correlation between the experimental and predicted data. Pearson’s correlation coefficient (R) was: steel A (0.97) and steel B (0.98). The Average Absolute Relative Error (AARE) values were: 7.62% (steel A) and 6.54% (steel B). The study shows that the Arrhenius equations can effectively describe the flow stress behaviour of P91 steel, and this method is applicable to the industrial metalworking process. |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
Comparative Study on Hot Metal Flow Behaviour of Virgin and Rejuvenated Heat Treatment Creep Exhausted P91 Steel |
en_US |
dc.type |
Article |
en_US |