Investigation of liquid metal embrittlment in advanced high strength steels

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dc.contributor Barkey, Mark E.
dc.contributor Weaver, Mark Lovell
dc.contributor.advisor Brewer, Luke N. Briant, Nathaniel P. 2018-12-14T18:11:59Z 2018-12-14T18:11:59Z 2018
dc.identifier.other u0015_0000001_0003101
dc.identifier.other Briant_alatus_0004M_13572
dc.description Electronic Thesis or Dissertation
dc.description.abstract This thesis explored the susceptibility of ferritic/bainitic, advanced high strength steels to zinc-based liquid metal embrittlement (LME). The understanding of the causes and effects of LME is critical because of the common use of zinc coatings for corrosion protection and an increased used of advanced high strength steels in industries such as automotive. Transformation induced plasticity steels, TBF 1180 and TRIP 700, and a complex phase steel, CP 1200, were studied to assess their susceptibility to LME during hot tensile tests. Comparisons between stress versus strain curves collected with and without zinc coatings at various temperatures and strain rates were used to determine the effect of the zinc-based embrittlement on the mechanical properties of these steels. The stress versus strain curves were collected using uniaxial hot tensile tests in a Gleeble 1500D thermal-mechanical simulator from Dynamic Systems Inc. The fracture modes were studied using scanning electron microscopy and energy-dispersive X-ray spectrometry (EDS). From the results it was determined that all three steels demonstrated LME at temperatures between 800 C and 900 C and nominal strain rates of 1.3 and 0.13 strain per second. The fracture mode for all LME cracks was found to be intergranular.
dc.format.extent 56 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Engineering
dc.title Investigation of liquid metal embrittlment in advanced high strength steels
dc.type thesis
dc.type text University of Alabama. Department of Metallurgical and Materials Engineering Metallurgical Engineering The University of Alabama master's M.S.

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