Print Email Facebook Twitter Elemental segregation during resistance spot welding of boron containing advanced high strength steels Title Elemental segregation during resistance spot welding of boron containing advanced high strength steels Author Amirthalingam, M. Van der Aa, E.M. Kwakernaak, C. Hermans, M.J.M. Richardson, I.M. Faculty Mechanical, Maritime and Materials Engineering Department Materials Science and Engineering Date 2015-07-01 Abstract The partitioning behaviour of carbon, phosphorous and boron during the solidification of a resistance spot weld pool was studied using experimental simulations and a phase field model. Steels with varying carbon, phosphorous and boron contents were designed and subjected to a range of resistant spot welding thermal cycles. Mechanical properties were evaluated by hardness and cross tension tests and correlated with the weld microstructure. Phase field modelling results and experimental predictions show that the phosphorus concentration in the last area in the weld pool to solidify can reach about 0.38 wt% for a steel with a bulk concentration of 0.08 wt%. Elemental analysis indicates that in the absence of boron, the grain boundaries of columnar grains in the weld pool are decorated with phosphorous. As a result, a complete interface failure occurs during cross tension testing. With the addition of boron, apart from an increase in weld strength and plug diameter, the failure mode switches to a complete plug mode, resulting from the phosphorous depletion at the grain/inter-phase boundaries. Subject resistance spot weldingsegregationB additionslow alloy steelsmathematical modelsmicrostructure To reference this document use: http://resolver.tudelft.nl/uuid:17cba57e-0e9b-4e83-88e4-6ae2acd7c78a Publisher Springer ISSN 0043-2288 Source https://doi.org/10.1007/s40194-015-0250-3 Source Welding in the World, 59 (5), 2015 Part of collection Institutional Repository Document type journal article Rights © 2015 The Author(s)This article is published with open access at Springerlink.com Files PDF Amirthalingam 2015.pdf 4.54 MB Close viewer /islandora/object/uuid:17cba57e-0e9b-4e83-88e4-6ae2acd7c78a/datastream/OBJ/view