Microstructural, mechanical properties and corrosion resistance of ferritic stainless steel welded by GTAW and coated by flame spraying

J. Delgado-Venegas, A. Molina-Díaz, R. R. Ambriz-Rojas, R. Cuenca-Álvarez

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Ferritic stainless steels are widely used in transportation industry due to their exceptional performance regarding mechanical and corrosion properties. However, after a welding process, joints feature the sensitizing phenomenon because of the heat exchange from the torch affecting mechanical properties and corrosion resistance. This work describes the behavior firstly of mechanical properties of weld joints of ferritic stainless steel as base material without and with filler material (AISI 308L) by gas tungsten arc welding (GTAW). Operating parameters such as arc voltage, welding currrent, welding speed, feed speed, shielding gas flow were evaluated. Secondly, samples of weld joints were coated by flame spraying of composite particles in order to reduce the weight loss induced by corrosion in a salt spray (fog) apparatus. Changes induced from GTAW on the heat affected zone and Thermal Spraying on corrosion resistance, were monitored by optical and scanning electron microscopy, microhardness and longitudinal tensile testing. Results show that GTAW helps to control the size and the microstructure of heat affected zone improving simultaneously the mechanical properties. Meanwhile, welded joints covered by composite coatings feature a lower damage provided that the ceramic phase has been homogeneously dispersed.

Original languageEnglish
Title of host publicationAdvanced Structural Materials - 2014
EditorsJorge Lopez-Cuevas, Francisco C. Robles Hernandez, Antonieta Garcia-Murillo
PublisherMaterials Research Society
Pages1-9
Number of pages9
ISBN (Electronic)9781605117423
DOIs
StatePublished - 2016
Event23rd International Materials Research Congress, IMRC 2014 - Cancun, Quintana Roo, Mexico
Duration: 17 Aug 201421 Aug 2014

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1765
ISSN (Print)0272-9172

Conference

Conference23rd International Materials Research Congress, IMRC 2014
Country/TerritoryMexico
CityCancun, Quintana Roo
Period17/08/1421/08/14

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