Analysis of Liquid Metal Brittleness in Ultra-high Strength Galvanized Sheet

DOI

10.2991/978-94-6463-114-2_24How to use a DOI?

Keywords

Ultra-high strength steel Galvanized sheet; Liquid metal brittleness LME; Multi-pulse spot welding process

Abstract

The application ratio of ultra-high-strength galvanized steel sheets in automobiles is increasing year by year. Due to the low melting point of the galvanized layer, it be melted to liquid phase metal at the welding temperature. After contacting the solid material, the liquid phase metal be penetrated into the matrix along the grain boundary from surface to the matrix, leading to metal brittleness LME. It has been verified that the generation mechanism of LME is that after solid metal adsorbs the liquid metal, it promotes the emission, proliferation and movement of dislocations in solid metal, resulting in brittle cracking by the liquid metal, which reduces the impact toughness of the joint. LME can be controlled and prevented by means for methods of reducing the heat input of welding.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Y. S. Wei
PY  - 2023
DA  - 2023/03/02
TI  - Analysis of Liquid Metal Brittleness in Ultra-high Strength Galvanized Sheet
BT  - Proceedings of the 6th International Conference on Advanced High Strength Steel and Press Hardening (ICHSU 2022)
PB  - Atlantis Press
SP  - 176
EP  - 182
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-114-2_24
DO  - 10.2991/978-94-6463-114-2_24
ID  - Wei2023
ER  -