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Laser surface alloying of type 304 stainless steel for enhanced corrosion resistance

DSpace at IIT Bombay

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Title Laser surface alloying of type 304 stainless steel for enhanced corrosion resistance
 
Creator SRIDHAR, K
KHANNA, AS
GASSER, A
DESHMUKH, MB
 
Subject co2-laser
beam
laser surface alloying
laser induced plasma
energy absorption
austenitics
pitting corrosion
localised corrosion
 
Description For imparting localised corrosion resistance to AISI type 304 stainless steel, its surface alloying with chromium, nickel and molybdenum has been studied using a carbon dioxide laser. Effect of laser processing parameters, such as, scan speed, power and spot size was studied. Microstructural characterization of the alloyed surfaces was carried out using optical and scanning electron microscopy and localised corrosion susceptibility was studied using steady state corrosion potential vs time as well as by carrying out potentiodynamic polarisation, in aqueous chloride media. Analysis of the alloyed zone has revealed austenitic phase, with fine cellular dendritic micro-structure and good compositional homogeneity. Various surface alloys with molybdenum content ranging from 3 to 12 weight percent were obtained. Among these, the one containing 11 wt% molybdenum, exhibited enhanced passivity and possessed the best compositional homogeneity.
 
Publisher GORDON BREACH SCI PUBL LTD
 
Date 2011-07-30T11:28:57Z
2011-12-26T12:52:49Z
2011-12-27T05:39:44Z
2011-07-30T11:28:57Z
2011-12-26T12:52:49Z
2011-12-27T05:39:44Z
1996
 
Type Article
 
Identifier LASERS IN ENGINEERING, 5(2), 107-125
0898-1507
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7951
http://hdl.handle.net/10054/7951
 
Language en