Reveals adhesion failure origin
Quasi-in-situ analysis and first-principles calculations identify continuous Mn/Si external oxides and pores within the SiO2 layer as key causes of adhesion failure at the reduced iron/substrate interface of AHSS.
Jin, Xinyan · Guangxin, Wu
Materials Characterization 2023
SiO2/(011)Fe interface has highest binding energy, most prone to cracking (first-principles prediction)
Actual crack initiates and propagates inside amorphous SiO2 layer, not along SiO2/Fe interface
SiO2 layer contains numerous pores, serving as actual crack initiation sites