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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9783

Title: Microstructural evaluation of molybdenum-containing stainless steel weld metals by a potentiostatic etching technique
Authors: PUJAR, MG
DAYAL, RK
GILL, TPS
MALHOTRA, SN
Keywords: corrosion
ferrite
Issue Date: 1998
Publisher: KLUWER ACADEMIC PUBL
Citation: JOURNAL OF MATERIALS SCIENCE, 33(10), 2691-2700
Abstract: Microstructure of austenitic stainless steel weld metals is complicated by the presence of delta-ferrite and microsegregated regions rich in chromium and molybdenum, as well as other minor alloying elements such as sulphur and phosphorus at the delta/gamma interphase boundaries. Detailed microstructural studies are required in order to establish correlation between various metallurgical as well as electrochemical corrosion properties with the weld metal microstructure. The conventional chemical etching technique was found to be inadequate in revealing different microconstituents. A powerful potentiostatic etching technique was used to reveal not only ferrite but also different microconstituents that had different specific electrochemical potentials at which they dissolved. This paper describes the weld metal microstructure developed by the addition of molybdenum (4.16-5.83 wt%) to type 316 stainless steel weld metals during Tungsten Inert Gas (TIG) welding with different heat inputs. (C) 1998 Chapman & Hall.
URI: http://dx.doi.org/10.1023/A:1004334109353
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9783
http://hdl.handle.net/10054/9783
ISSN: 0022-2461
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