Original test device for crack propagation in the weld nugget of advanced high strength steels

Abstract : Advanced High-Strength Steels are ever increasingly used in industry, and unlike mild steels the crack propagates through the weld nugget. At the present time, any method to measure the strength of the fusion zone is unavailable. Therefore a new test setup enforcing crack propagation through the weld nugget was developed. In the wedge test proposed, this device provides stable crack growth as the wedge is displaced. Thus, along with in situ observations, this device, without any prior assumptions is able to measure energy dissipation rate as well as crack opening angle. This is very significant because from these two data, a mechanical modeled was established to predict the cohesive energy and strength in the weld nuggets of AHSS. This method: the experimental setup and mechanical model were then applied to commercial alloys and synthetic grades successfully. This indicates that this methodology can be applied to any type of alloy. (C) 2015 Elsevier Ltd. All rights reserved.
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Engineering Fracture Mechanics, Elsevier, 2015, 138, pp.156-168 〈10.1016/j.engfracmech.2015.02.022 〉
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https://hal-emse.ccsd.cnrs.fr/emse-01500896
Contributeur : Géraldine Fournier-Moulin <>
Soumis le : lundi 3 avril 2017 - 17:13:27
Dernière modification le : jeudi 22 février 2018 - 13:06:04

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Rémi Lacroix, Guillaume Kermouche, Arnaud Lens, Jean-Michel Bergheau, Helmut Klöcker. Original test device for crack propagation in the weld nugget of advanced high strength steels . Engineering Fracture Mechanics, Elsevier, 2015, 138, pp.156-168 〈10.1016/j.engfracmech.2015.02.022 〉. 〈emse-01500896〉

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