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Auswirkung der Mehrfachimpulsstrombehandlung auf das Gefüge und die Mikrohärte des widerstandspunktgeschweißten Dualphasenstahls DP 590
Author(s) -
Soomro I.A.,
Pedapati S.R.
Publication year - 2020
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201900239
Subject(s) - equiaxed crystals , materials science , microstructure , indentation hardness , martensite , dual phase steel , welding , metallurgy , spot welding , pulse (music) , phase (matter) , joint (building) , composite material , structural engineering , chemistry , electrical engineering , engineering , voltage , organic chemistry
In this paper, microhardness and microstructural characteristics of dual phase DP590 steel resistance spot weld joint under two different welding conditions (i. e. single pulse and multi pulse) were studied. It was observed that applying multi pulse currents resulted in quasi‐equiaxed grains of tempered martensite in fusion zone (FZ) of the weldment. The refinement of microstructure in fusion zone using multi pulse current treatment resulted in reduced hardness of the weld joint.