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Browsing by Subject "Laser surface alloying"

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Evaluation of WC-9Co-4Cr laser surface alloyed coatings on stainless steel

Author: Obadele, A ; Olubambi, PA ; Pityana, Sisa L ; Popoola, API Date: Jul 2011 In order to examine the microstructure and hardness behaviour of WC cermets, coatings have been obtained by laser surface alloying technique. WC-9Co-4Cr particulate was injected onto the surface of AISI 304L austenitic stainless steel (ASS) ... Read more
Hardfacing of aluminium alloys by means of metal matrix composites produced by laser surface alloying

Author: Pityana, Sisa L Date: Jun 2009 Metal matrix composite layers were formed on an aluminium substrate by means of laser surface alloying method. Aluminium 1200 was used as a host material and TiC particles were used as the reinforcement. The microstructure of the modified ... Read more
Improvement of the surface properties of aluminium by the formation of intermetallic phases and metal matrix composites during laser surface alloying

Author: Mabhali, Luyolo AB ; Pityana, Sisa L ; Sacks, N Date: May 2011 Aluminium is widely used in industry due to its low cost, light weight and excellent workability, but is lacking in wear resistance and hardness. Laser alloying is used to improve the surface properties, such as hardness, by modifying the ... Read more
The influence of heat treatment and process parameters optimization on hardness and corrosion properties of laser alloyed X12CrNiMo steel

Author: Popoola, API ; Fatoba, OS ; Popoola, M ; Pityana, Sisa L Date: Oct 2016 Martensitic stainless steels are used in the production of steam turbine blades but their application is limited due to low hardness and poor corrosion resistance. Laser surface alloying and heat treatment of X12CrNiMo Martensitic stainless ... Read more
Laser surface alloying (LSA) of aluminium (AA 1200) with TiB2 for hardness improvement

Author: Popoola, AP ; Pityana, Sisa L Date: Oct 2010 The present work deals with the development of Aluminium metal matrix composite (MMC) using TiB2 reinforcement. The aim is to improve the microhardness property of the substrate. The surface of the aluminium was sand blasted to improve its ... Read more
Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance

Author: Nath, S ; Pityana, Sisa L ; Majumdar, JD Date: Mar 2012 In the present study, laser surfac ealloying of aluminium with WC + Co + NiCr (in the ratio of 70:15:15) has been conducted using a 5 kW continuous wave (CW) Nd:YAG laser (at a beam diameter of 0.003 m), with the output power ranging from 3 ... Read more
Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance

Author: Nath, S ; Pityana, Sisa L ; Majumdar, JD Date: Mar 2012 In the present study, laser surface alloying of aluminium with WC + Co + NiCr (in the ratio of 70:15:15) has been conducted using a 5 kW continuous wave (CW) Nd:YAG laser (at a beam diameter of 0.003 m), with the output power ranging from 3 ... Read more
Laser surface alloying of aluminum (AA1200) with Ni and SiC Powders

Author: Mabhali, Luyolo AB ; Pityana, Sisa L ; Sacks, N Date: Dec 2010 An Nd:YAG laser was used for surface alloying of aluminum AA1200. The alloying powder was a mixture of Ni and SiC in different ratios. A study of the microstructures obtained after alloying was conducted using optical and scanning electron ... Read more
Nd: YAG laser treatment of aluminium-TiB2 coated: optimization of corrosion properties

Author: Popoola, PAI ; Pityana, Sisa L ; Fedotova, T ; Popoola, OM Date: Jun 2011 As the reports in the literature regarding corrosion performance of Al/TiB2 MMC are rather contradictory, the optimization of laser surface alloying parameters for these composite coatings seems to be necessary. The characterization of the ... Read more
Three body abrasion of laser surface alloyed aluminium AA1200

Author: Mabhali, Luyolo AB ; Sacks, N ; Pityana, Sisa L Date: Jun 2012 Laser surface alloying of aluminium AA1200 was performed with a 4 kW Nd:YAG laser to improve the abrasion wear resistance. Aluminium surfaces reinforced with metal matrix composites and intermetallic phases were achieved. The phases present ... Read more

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Browsing by Subject "Laser surface alloying"

Browsing by Subject "Laser surface alloying"

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