Liquid Metal Embrittlement

The weldability is one of the key factors governing applications of TWinning-Induced Plasticity (TWIP) steels to automotive industries demanding high economy, environmental friendliness, and high performance.

 

During spot welding of Zn-coated Al-containing TWIP steel sheets, liquid metal embrittlement (LME) frequently occurs by Zn infiltration into grain boundaries to form cracks, but the direct observation and detailed analysis of LME cracking are quite difficult because it occurs instantaneously within a second.

 

We investigate the LME mechanism by detailed microstructural evolutions of small Zn infiltrations or cracks as well as formation behavior of various intermetallic phases.

*Key Publications

Mater. Charact. (2019)                  https://doi.org/10.1016/j.matchar.2018.11.008

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