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Browsing Research Articles (Materials Science and Metallurgical Engineering) by Author "Annan, Kofi Ahomkah"
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Annan, Kofi Ahomkah; Stumpf, Waldo E.
(Iron and Steel Institute of Japan, 2018-02-15)
Please read abstract in the article.
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Ardayfio, Beatrice; Ampah-Essel, John Ekow; Tetteh, William; Tuah, Joshua Asante; Agyei-Tuffour, Benjamin; Annan, Kofi Ahomkah; Mensah, Bismark; Nyankson, Emmanuel; Dodoo-Arhin, David
(Taylor and Francis, 2023-06-15)
This paper presents the numerical and experimental results of the mechanical and microstructural properties of liquefied petroleum gas cylinders from local sources. The tensile strength, burst and fracture toughness of the ...
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Fikeni, L.; Annan, Kofi Ahomkah; Seerane, M.; Mutombo, K.; Machaka, R.
(IOP Publishing, 2019-11-09)
Metallic biomedical implants such as titanium-based alloys are very useful for
orthopaedic applications due to their excellent properties which responds to changes in
temperature and other conditions. However, biological ...
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Njoroge, Eric Gitau; Hlatshwayo, Thulani Thokozani; Mlambo, Mbuso; Odutemowo, Opeyemi Shakirah; Annan, Kofi Ahomkah; Skuratov, V.A.; Ismail, M.; Malherbe, Johan B.
(Elsevier, 2021-09)
Please read abstract in the article.
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Lekoadi, Paul M.; Tlotleng, Monnamme; Annan, Kofi Ahomkah; Maledi, Nthabiseng; Masina, Bathusile
(MDPI, 2021-02-03)
This study presents the investigation on how heat treatment parameters, which are temperature,
cooling method, and residence time, influence the microstructural and hardness properties
of Ti6Al4V components produced on ...
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Annan, Kofi Ahomkah; Njoroge, Eric Gitau; Siyasiya, Charles Witness; Mostert, Roelf Johannes
(Elsevier, 2021-01)
A fifty litre seamless gas cylinder manufactured from a 34CrMo4 low carbon alloy steel which was in service for five years failed in an unexpected manner, causing severe damage. The cylinder was filled with a mixture of ...
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Annan, Kofi Ahomkah; Nkhoma, Richard; Siyasiya, Charles Witness; Mostert, Roelf Johannes
(Elsevier, 2022)
Thin-walled Al-Si alloy precision casting components are used for various applications due to their excellent castability, corrosion resistance as well as high strength to weight ratio. It is very difficult to achieve all ...
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Annan, Kofi Ahomkah; Daswa, P.; Motumbo, K.; Siyasiya, Charles Witness
(Elsevier, 2021)
Titanium aluminides are considered the choice material for next generation propulsion systems due to their high specific strength and high temperature performance coupled with good oxidation resistance. They are considered ...
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Annan, Kofi Ahomkah; Siyasiya, Charles Witness; Stumpf, Waldo E.
(Southern African Institute of Mining and Metallurgy, 2015-10)
The relationship between niobium content and austenite grain growth has
been investigated through hot rolling simulation on a Bähr dilatometer.
The effect of delay time between passes during rough rolling in Nbmicroall ...
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Mapoli, Tresor Okabo; Mutombo, Kalenda; Annan, Kofi Ahomkah; Siyasiya, Charles Witness
(Springer, 2022-06)
Please read abstract in the article.
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Khanyema, Simphiwe; Annan, Kofi Ahomkah; Mostert, Roelf Johannes; Siyasiya, Charles Witness; Moema, Joseph
(Suid-Afrikaanse Akademie vir Wetenskap en Kuns, 2021)
The prior austenite grain size of steels greatly influences the phase transformation kinetics during austenitization and the microstructure which determines the mechanical properties. The effect of temperature and time on ...
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Mapoli, Tresor Okabo; Annan, Kofi Ahomkah; Siyasiya, Charles Witness; Mutombo, Kalenda
(IOP Publishing, 2019-11-09)
The present study focused on preparation and characterization of 60Al-40V master
alloy which was produced via aluminothermic process. The study assessed the production in
order to provide the optimum Al requirement for ...