Lee, Soyeon Kim, Seung-Rok Triambulo, Ross E. Lim, Chang-Jin Kim, Han-Jin Suh, Jin-Yoo Kang, Hyung-Gu Park, Jin-Woo 2024-01-19T12:02:04Z 2024-01-19T12:02:04Z 2022-06-30 2022-05 2470-1343 https://pubs.kist.re.kr/handle/201004/115186 Despite various strategies to address sticking failure in stainless steels (STSs), difficulties in understanding its fundamental mechanisms hinder precise solutions during STS fabrication. This study investigated the effect of chromium (Cr) content on the microstructures and failure modes of oxide scales under a tensile load, simulating the hot-rolling process. The dynamic, real-time behavior of crack initiation, propagation, and interfacial delamination in the oxide scales under tension was analyzed using an in situ scanning electron microscopy (SEM) tensile test. With a high Cr content, iron (Fe) oxide and chromium(III) oxide (Cr2O3) form a layered structure, which is delaminated along the interfaces between the thin Cr2O3 layer and the bulk after perpendicular cracking. The saturated crack densities obtained from in situ SEM provide interfacial strength, while the elastic modulus and hardness obtained from nanoindentation provide vertical fracture strength. In combination with an ex situ elemental image analysis, the in situ SEM results reveal three different failure modes of the four different STSs. The results confirm that sticking failure is more likely to occur as the Cr content increases. English ACS Publications In Situ Scanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling Article 10.1021/acsomega.2c01267 1 ACS OMEGA, v.7, no.17, pp.15174 - 15185 ACS OMEGA 7 17 15174 15185 Y scie scopus 000813267400001 Chemistry, Multidisciplinary Chemistry Article MECHANICAL-PROPERTIES OXIDATION MICROSTRUCTURE DEFORMATION INITIATION FRICTION BEHAVIOR