dc.contributor.author |
Nath, S
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|
dc.contributor.author |
Pityana, Sisa L
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|
dc.contributor.author |
Majumdar, JD
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dc.date.accessioned |
2012-04-02T08:02:34Z |
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dc.date.available |
2012-04-02T08:02:34Z |
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dc.date.issued |
2012-03 |
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dc.identifier.citation |
Nath, S, Pityana, S and Majumdar, JD. 2012. Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance. Surface & Coatings Technology, vol. 206(15), pp 3333-3341, doi: 10.1016/j.surfcoat.2012.01.038 |
en_US |
dc.identifier.issn |
0257-8972 |
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dc.identifier.uri |
http://www.sciencedirect.com/science/article/pii/S0257897212000540
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dc.identifier.uri |
http://hdl.handle.net/10204/5707
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|
dc.description |
Copyright: 2012 Elsevier. This is the post-print version of the work. The definitive version is published in Surface & Coatings Technology, vol. 206(15), pp 3333-3341, doi: 10.1016/j.surfcoat.2012.01.038 |
en_US |
dc.description.abstract |
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 to 3.5 kW and scan speed from 0.012 m/s to 0.04 m/s by simultaneous feeding of precursor powder (at a flow rate of 1 × 10- 5 kg/s) and using He shroud at a gas flow rate of 3 × 10- 6 m3/s. The effect of laser power and scan speed on the characteristics (microstructures, phases and composition) and properties (wear and corrosion resistance) of the surface alloyed layer have been investigated in details. Laser surface alloying leads to development of fine grained aluminium with the dispersion of WC, W2C, Al4C3, Al9Co2, Al3Ni, Cr23C6, and Co6W6C. The microhardness of the alloyed zone is significantly improved to a maximum value of 650 VHN as compared to 22 VHN of the as-received aluminium substrate. The mechanism of microhardness enhancement has been established. The fretting wear behavior of the alloyed zone was evaluated against WC by Ball-on-disc wear testing unit and the mechanism of wear was established. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Workflow;8269 |
|
dc.subject |
Laser surface alloying |
en_US |
dc.subject |
Aluminium |
en_US |
dc.subject |
Microstructure |
en_US |
dc.subject |
Microhardness |
en_US |
dc.subject |
Coatings technology |
en_US |
dc.title |
Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Nath, S., Pityana, S. L., & Majumdar, J. (2012). Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance. http://hdl.handle.net/10204/5707 |
en_ZA |
dc.identifier.chicagocitation |
Nath, S, Sisa L Pityana, and JD Majumdar "Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance." (2012) http://hdl.handle.net/10204/5707 |
en_ZA |
dc.identifier.vancouvercitation |
Nath S, Pityana SL, Majumdar J. Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance. 2012; http://hdl.handle.net/10204/5707. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Nath, S
AU - Pityana, Sisa L
AU - Majumdar, JD
AB - 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 to 3.5 kW and scan speed from 0.012 m/s to 0.04 m/s by simultaneous feeding of precursor powder (at a flow rate of 1 × 10- 5 kg/s) and using He shroud at a gas flow rate of 3 × 10- 6 m3/s. The effect of laser power and scan speed on the characteristics (microstructures, phases and composition) and properties (wear and corrosion resistance) of the surface alloyed layer have been investigated in details. Laser surface alloying leads to development of fine grained aluminium with the dispersion of WC, W2C, Al4C3, Al9Co2, Al3Ni, Cr23C6, and Co6W6C. The microhardness of the alloyed zone is significantly improved to a maximum value of 650 VHN as compared to 22 VHN of the as-received aluminium substrate. The mechanism of microhardness enhancement has been established. The fretting wear behavior of the alloyed zone was evaluated against WC by Ball-on-disc wear testing unit and the mechanism of wear was established.
DA - 2012-03
DB - ResearchSpace
DP - CSIR
KW - Laser surface alloying
KW - Aluminium
KW - Microstructure
KW - Microhardness
KW - Coatings technology
LK - https://researchspace.csir.co.za
PY - 2012
SM - 0257-8972
T1 - Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance
TI - Laser surface alloying of aluminium with WC+Co+NiCr for improved wear resistance
UR - http://hdl.handle.net/10204/5707
ER -
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en_ZA |