Laser surface alloying of an electroless Ni-P coating with Al-356 substrate

Gholam Reza Gordani; Reza ShojaRazavi; Sayed Hamid Hashemi; Ali Reza Nasr Isfahani

doi:10.1016/j.optlaseng.2008.02.002

Laser surface alloying of an electroless Ni-P coating with Al-356 substrate

Gholam Reza Gordani
, Reza ShojaRazavi
, Sayed Hamid Hashemi
, Ali Reza Nasr Isfahani

Research output: Journal Publication › Article › peer-review

49 Citations (Scopus)

Abstract

Laser surface alloying of an electroless plating Ni-P coatings on an Al-356 aluminium alloy was carried out using a 1-kW pulsed Nd:YAG laser. The microstructure, chemical composition and phase identification of the alloyed layer were determined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffractometry (XRD), respectively. It was shown that laser surface treatment produced a relatively smooth, crack-free and hard surface layer. The hardness of the surface significantly increased due to the formation of the uniformly distributed fine Ni-Al intermetallic phases. The corrosion behaviour of the surface alloyed specimens in 3.5% NaCl solution at 23 °C was also determined by electrochemical techniques. The laser-alloyed surface showed an improved corrosion and pitting potential compared to the substrate as well as the plated Ni-P coating.

Original language	English
Pages (from-to)	550-557
Number of pages	8
Journal	Optics and Lasers in Engineering
Volume	46
Issue number	7
DOIs	https://doi.org/10.1016/j.optlaseng.2008.02.002
Publication status	Published - Jul 2008
Externally published	Yes

Free Keywords

Electroless Ni-P coating
Laser surface alloying
Pitting corrosion

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Mechanical Engineering
Electrical and Electronic Engineering

Access to Document

10.1016/j.optlaseng.2008.02.002

Cite this

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title = "Laser surface alloying of an electroless Ni-P coating with Al-356 substrate",

abstract = "Laser surface alloying of an electroless plating Ni-P coatings on an Al-356 aluminium alloy was carried out using a 1-kW pulsed Nd:YAG laser. The microstructure, chemical composition and phase identification of the alloyed layer were determined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffractometry (XRD), respectively. It was shown that laser surface treatment produced a relatively smooth, crack-free and hard surface layer. The hardness of the surface significantly increased due to the formation of the uniformly distributed fine Ni-Al intermetallic phases. The corrosion behaviour of the surface alloyed specimens in 3.5\% NaCl solution at 23 °C was also determined by electrochemical techniques. The laser-alloyed surface showed an improved corrosion and pitting potential compared to the substrate as well as the plated Ni-P coating.",

keywords = "Electroless Ni-P coating, Laser surface alloying, Pitting corrosion",

author = "Gordani, \{Gholam Reza\} and Reza ShojaRazavi and Hashemi, \{Sayed Hamid\} and Isfahani, \{Ali Reza Nasr\}",

year = "2008",

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doi = "10.1016/j.optlaseng.2008.02.002",

language = "English",

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TY - JOUR

T1 - Laser surface alloying of an electroless Ni-P coating with Al-356 substrate

AU - Gordani, Gholam Reza

AU - ShojaRazavi, Reza

AU - Hashemi, Sayed Hamid

AU - Isfahani, Ali Reza Nasr

PY - 2008/7

Y1 - 2008/7

N2 - Laser surface alloying of an electroless plating Ni-P coatings on an Al-356 aluminium alloy was carried out using a 1-kW pulsed Nd:YAG laser. The microstructure, chemical composition and phase identification of the alloyed layer were determined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffractometry (XRD), respectively. It was shown that laser surface treatment produced a relatively smooth, crack-free and hard surface layer. The hardness of the surface significantly increased due to the formation of the uniformly distributed fine Ni-Al intermetallic phases. The corrosion behaviour of the surface alloyed specimens in 3.5% NaCl solution at 23 °C was also determined by electrochemical techniques. The laser-alloyed surface showed an improved corrosion and pitting potential compared to the substrate as well as the plated Ni-P coating.

AB - Laser surface alloying of an electroless plating Ni-P coatings on an Al-356 aluminium alloy was carried out using a 1-kW pulsed Nd:YAG laser. The microstructure, chemical composition and phase identification of the alloyed layer were determined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffractometry (XRD), respectively. It was shown that laser surface treatment produced a relatively smooth, crack-free and hard surface layer. The hardness of the surface significantly increased due to the formation of the uniformly distributed fine Ni-Al intermetallic phases. The corrosion behaviour of the surface alloyed specimens in 3.5% NaCl solution at 23 °C was also determined by electrochemical techniques. The laser-alloyed surface showed an improved corrosion and pitting potential compared to the substrate as well as the plated Ni-P coating.

KW - Electroless Ni-P coating

KW - Laser surface alloying

KW - Pitting corrosion

UR - https://www.scopus.com/pages/publications/43049176371

U2 - 10.1016/j.optlaseng.2008.02.002

DO - 10.1016/j.optlaseng.2008.02.002

M3 - Article

AN - SCOPUS:43049176371

SN - 0143-8166

VL - 46

SP - 550

EP - 557

JO - Optics and Lasers in Engineering

JF - Optics and Lasers in Engineering

IS - 7

ER -

Laser surface alloying of an electroless Ni-P coating with Al-356 substrate

Abstract

Free Keywords

ASJC Scopus subject areas

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