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Journal of Materials Engineering and Performance

Erschienen in:

04.04.2019

Experimental and Numerical Analysis of Liquid Metal Embrittlement Crack Location

verfasst von: C. DiGiovanni, X. Han, A. Powell, E. Biro, N. Y. Zhou

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 4/2019

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Abstract

Advanced high-strength steels used in automotive structural components are commonly protected using zinc coatings. However, the steel/zinc system creates the potential for liquid metal embrittlement during welding. Although liquid metal embrittlement cracks are known to form, the current literature does not include crack location when assessing crack severity. In this work, TRIP1100 joints showed that LME cracks decreased strength from 7.8 to 42.2%, depending on location, between the coated (cracked) and uncoated (non-cracked) condition. Liquid metal embrittlement cracks in critical locations were observed to propagate until fracture from lap shear testing. However, cracks in non-critically loaded areas were not part of the fracture path and did not result in a significant loss in strength. This shows LME crack location can be controlled to improve joint performance and vehicle safety. In addition, a model of lap shear testing in a cracked sample showed how the presence of a crack can affect the internal stress field depending on its location.

Vorheriger Artikel On the Relationship Between Dislocation Creep Strength and Microstructure of a Solid-Solution-Strengthened Ni-Base Superalloy

Nächster Artikel Influence of Multidirectional Forging on Microstructural, Mechanical, and Corrosion Behavior of Mg-Zn Alloy

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Titel: Experimental and Numerical Analysis of Liquid Metal Embrittlement Crack Location
verfasst von: C. DiGiovanni
X. Han
A. Powell
E. Biro
N. Y. Zhou
Publikationsdatum: 04.04.2019
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 4/2019
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04005-2

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