Influence of Filler Wire Material on Dissimilar Welding of 15-5PH to KC20WN (Haynes 25)

Joby V. Thomas; K. Thomas Tharian; C.R. Anoop; P. Chakravarthy

doi:10.4028/www.scientific.net/MSF.830-831.298

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HomeMaterials Science ForumMaterials Science Forum Vols. 830-831Influence of Filler Wire Material on Dissimilar...

Influence of Filler Wire Material on Dissimilar Welding of 15-5PH to KC20WN (Haynes 25)

Abstract:

Many of the components/assemblies used in strategic sectors involve dissimilar metal weld joints and dissimilar welding has always imposed challenges in terms of the weld quality because of the physical and chemical mismatches of the base metals. In the present study, dissimilar welding of stainless steel 15-5PH (UNS S15500) to a Cobalt-base super alloy KC20WN (UNS R30605/ Haynes 25) is attempted for specific purpose in space applications. Gas Tungsten Arc Welding is carried out with two types of filler wires, viz., KC20WN and ER 630 (17-4PH). Visual inspection, Dye Penetrant testing and X-ray radiography testing revealed defect free joints and the joints were also characterized for microstructure. Superior properties were observed when welding was carried out with KC20WN filler wire compared to that with ER630 filler wire.

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Periodical:

Materials Science Forum (Volumes 830-831)

Pages:

298-301

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.830-831.298

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Cite this paper

Online since:

September 2015

Authors:

Joby V. Thomas, K. Thomas Tharian, C.R. Anoop, P. Chakravarthy

Keywords:

Columnar/ Dendritic Structure, Dissimilar Welding, Solid Solution Strengthening

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