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Microstructure and mechanical properties of keyhole plasma arc welded dual phase steel DP600
Published in Elsevier Ltd
2019
Volume: 270
   
Pages: 28 - 36
Abstract
In this work, key hole mode plasma arc welding of 6 mm thick DP600 steel plates have been carried out and the effect of post-weld heat treatment is presented. The microstructures of the fusion zone and heat affected zones are studied. The tensile strength of the as-welded joint is found to decrease by 8%, while the post-weld heat treated weld joint and heat treated base metal showed a 15% reduction compared to as-received DP600. The failure occurred in the far heat affected zone, where softening occurred due to martensite tempering. The impact properties at room temperature were similar for all samples, whereas at −29 °C, the base metal impact property did not decrease while that of weld metal decreased considerably. Bend tests indicated good ductility and formability. © 2019 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Materials Processing Technology
PublisherData powered by TypesetElsevier Ltd
ISSN09240136
Open AccessNo
Concepts (15)
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    Electric arc welding
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    Heat affected zone
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    Heat treatment
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    Martensite
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    Mechanical properties
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    Microstructure
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    PLASMA WELDING
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    Tensile strength
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    BEND TEST
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    DP600
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    IMPACT PROPERTY
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    KEYHOLE MODE
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    POST WELD HEAT TREATMENT
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    TEMPERED MARTENSITE
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    Dual phase steel