Browsing Engineering, Built Environment and Information Technology by Supervisor "Siyasiya, Charles Witness"
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Browsing Engineering, Built Environment and Information Technology by Supervisor "Siyasiya, Charles Witness"
Now showing items 1-15 of 15
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(University of Pretoria, 2017)Hot strip mills (HSM) are used to roll cast slabs down from their initial size to plate or sheet, which is then used to manufacture a wide variety of goods for many industrial markets. The working rolls that contact and ...
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(University of Pretoria, 2020)The automotive industry currently demands materials with improved formability and crash performance. Austenitic stainless steels have been singled out for potential development of high strength steels to achieve exceptional ...
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(University of Pretoria, 2013)Global warming and air pollution are the major problems facing the world today. Therefore strict environmental legislation on the emission of harmful gases from motor vehicles has forced the automobile industry to search ...
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(University of Pretoria, 2012)The last seven hot rolling passes of the ferritic stainless steels (FSS) AISI 430 and AISI 433 (the latter an Al-added variant of 430) were simulated on Gleeble-1500D® and Gleeble-3800TM® thermo-mechanical simulators to ...
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(University of Pretoria, 2017)Ferritic stainless steels (FSSs) are gaining popularity because they are cheaper than austenitic stainless steels (ASS) since they contain almost no nickel. Amongst these FSSs, there is a relatively new grade of steel ...
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(2014-08-20)Although the austenitic stainless steels 304 and 321 are often treated nominally as equivalents in their hot rolling characteristics, the question remains whether any subtle differences between the two allow ...
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(University of Pretoria, 2018)An empirical equation was developed for the prediction of the critical strain for the onset of dynamic recrystallization (DRX) in microalloyed Nb-containing steels. Single-rolling pass isothermal compression tests were ...
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(University of Pretoria, 2020)Surface transverse cracking is still one of the main problems in the continuous casting of steel. The cooling rate at the corners of the slab and strand is usually the highest. Therefore, depending on the cooling regime, ...
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(University of Pretoria, 2013)The aim of the work presented was to investigate the effects of upper bainite on impact toughness in quench and tempered low alloy plate steels. The experimental research included construction of CCT diagrams by dilatometry, ...
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(University of Pretoria, 2015)The effect of thermomechanical controlled processing (TMCP) parameters and chemistry on the grain growth constants n, Q and A in the grain growth equation was studied on microalloyed steels with varying compositions of Nb, ...
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(University of Pretoria, 2019)The -TiAl based intermetallic alloys play an important role in structural applications, such as aerospace and automotive industries. The current work studied the novel development and microstructural evolution, along ...
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(University of Pretoria, 2020)Among many shape memory alloys, Ti-Pt alloys have potential as a high temperature shape memory alloy. The alloy undergoes a reversible martensitic transformation at temperatures above 1000 oC. However, the alloy’s negligible ...
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(University of Pretoria, 2018)A series of single compression tests were performed in order to improve the understanding of the influence of processing parameters (temperature, strain and strain rate) on the hot deformation behaviour of 2304 LDSS. The ...
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(University of Pretoria, 2018)The thermo-mechanical processing of microalloyed steels has been studied widely. However most of the work has been focused on the finishing stages of hot rolling where pancaking of the austenite is desired for strength and ...
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(University of Pretoria, 2018)The role of retained austenite on the performance of cast iron based grinding media (balls) is somewhat controversial. One school of thought is that retained austenite improves the performance through work hardening and ...
Now showing items 1-15 of 15