@article{52613, abstract = {{During resistance spot welding of zinc-coated advanced high-strength steels (AHSSs) for automotive production, liquid metal embrittlement (LME) cracking may occur in the event of a combination of various unfavorable influences. In this study, the interactions of different welding current levels and weld times on the tendency for LME cracking in third-generation AHSSs were investigated. LME manifested itself as high-penetration cracks around the circumference of the spot welds for welding currents closely below the expulsion limit. At the same time, the observed tendency for LME cracking showed no direct correlation with the overall heat input of the investigated welding processes. To identify a reliable indicator of the tendency for LME cracking, the local strain rate at the origin of the observed cracks was analyzed over the course of the welding process via finite element simulation. While the local strain rate showed a good correlation with the process-specific LME cracking tendency, it was difficult to interpret due to its discontinuous course. Therefore, based on the experimental measurement of electrode displacement during welding, electrode indentation velocity was proposed as a descriptive indicator for quantifying cracking tendency.}}, author = {{Böhne, Christoph and Meschut, Gerson and BIEGLER, MAX and RETHMEIER, MICHAEL}}, issn = {{0043-2296}}, journal = {{Welding Journal}}, keywords = {{Metals and Alloys, Mechanical Engineering, Mechanics of Materials}}, number = {{7}}, pages = {{197--207}}, publisher = {{American Welding Society}}, title = {{{The Influence of Electrode Indentation Rate on LME Formation during RSW}}}, doi = {{10.29391/2022.101.015}}, volume = {{101}}, year = {{2022}}, } @article{52615, author = {{Böhne, Christoph and Meschut, Gerson}}, journal = {{Welding and Cutting}}, pages = {{208--212}}, title = {{{Reduction of flange widths in resistance spot welding by application of eccentric electrode cap geometries}}}, doi = {{10.53192/WAC202203208 }}, volume = {{3}}, year = {{2022}}, } @misc{22275, author = {{Böhne, Christoph and Tümkaya, Gökhan and Meschut, Gerson}}, booktitle = {{Schweißen und Schneiden}}, number = {{1-2}}, pages = {{26 -- 31}}, title = {{{Reduzierung der Flanschbreiten beim Widerstandspunktschweißen durch Einsatz exzentrischer Elektrodenkappengeometrien}}}, volume = {{73}}, year = {{2021}}, } @inproceedings{22276, author = {{Böhne, Christoph and Meschut, Gerson and Biegler, Max and Rethmeier, Michael}}, location = {{virtual event}}, title = {{{Practical methods for avoidance of liquid metal embrittlement in resistance spot welds of advanced high strength steels}}}, year = {{2021}}, } @inproceedings{22277, author = {{Böhne, Christoph and Biegler, Max and Meschut, Gerson and Rethmeier, Michael}}, location = {{virtual conference}}, title = {{{Application-oriented avoidance of liquid metal embrittlement during resistance spot welding of zinc-coated advanced high strenght steels}}}, year = {{2021}}, } @article{20269, author = {{Böhne, Christoph and Meschut, Gerson and Biegler, Max and Rethmeier, Michael}}, journal = {{Science and Technology of Welding and Joining}}, number = {{7}}, pages = {{617--624}}, publisher = {{Taylor & Francis}}, title = {{{Avoidance of liquid metal embrittlement during resistance spot welding by heat input dependent hold time adaption}}}, doi = {{10.1080/13621718.2019.1693731}}, volume = {{25}}, year = {{2020}}, } @inproceedings{20273, author = {{Biegler, Max and Rethmeier, Michael and Böhne, Christoph and Meschut, Gerson}}, booktitle = {{Joining in Car Body Engineering}}, title = {{{Resistance spot welding simulation can determine the critical stress- and strain-conditions leading to liquid metal embrittlement formation}}}, year = {{2020}}, } @article{20270, author = {{Böhne, Christoph and Meschut, Gerson and Biegler, Max and Frei, Julian and Rethmeier, Michael}}, journal = {{Science and Technology of Welding and Joining}}, number = {{4}}, pages = {{303--310}}, publisher = {{Taylor & Francis}}, title = {{{Prevention of liquid metal embrittlement cracks in resistance spot welds by adaption of electrode geometry}}}, doi = {{10.1080/13621718.2019.1693731}}, volume = {{25}}, year = {{2019}}, } @article{20271, author = {{Julian, Frei and Biegler, Max and Rethmeier, Michael and Böhne, Christoph and Meschut, Gerson}}, journal = {{Science and Technology of Welding and Joining}}, number = {{7}}, pages = {{624--633}}, publisher = {{Taylor & Francis}}, title = {{{Investigation of liquid metal embrittlement of dual phase steel joints by electro-thermomechanical spot-welding simulation}}}, doi = {{10.1080/13621718.2019.1582203}}, volume = {{24}}, year = {{2019}}, }