The Role of Grain Boundary Oxidation on Surface Crack Formation under Continuous Casting Conditions
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In: Berg- und hüttenmännische Monatshefte : BHM, Vol. 164.2019, No. 11, 02.10.2019, p. 461-465.
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TY - JOUR
T1 - The Role of Grain Boundary Oxidation on Surface Crack Formation under Continuous Casting Conditions
AU - Krobath, Roman
AU - Bernhard, Christian
AU - Ilie, Sergiu
AU - Six, Jakob
AU - Hahn, Susanne
AU - Pennerstorfer, Paul
PY - 2019/10/2
Y1 - 2019/10/2
N2 - This paper represents an extended abstract of a study presented at the ESTAD 2019 conference. In this contribution, the influence of different cooling strategies on the formation of intergranular surface cracks is observed with in-situ bending experiments under continuous casting conditions. The steel composition is equal to a 0.17 wt.% C construction steel. It is investigated with and without Al deoxidation at bending temperatures of 1100 °C to 700 °C. The results show the most critical situation prevailed for each testing condition at 900 °C. A holding temperature of 1200 °C leads to a selective grain boundary oxidation and therefore to the formation of notches at the austenite grain boundaries, which are the cause for stress concentrations and easier formation of cracks during a subsequent tensile deformation at critical temperatures. The experiments reveal a partially stronger influence of this phenomenon on the steel without Al deoxidation.
AB - This paper represents an extended abstract of a study presented at the ESTAD 2019 conference. In this contribution, the influence of different cooling strategies on the formation of intergranular surface cracks is observed with in-situ bending experiments under continuous casting conditions. The steel composition is equal to a 0.17 wt.% C construction steel. It is investigated with and without Al deoxidation at bending temperatures of 1100 °C to 700 °C. The results show the most critical situation prevailed for each testing condition at 900 °C. A holding temperature of 1200 °C leads to a selective grain boundary oxidation and therefore to the formation of notches at the austenite grain boundaries, which are the cause for stress concentrations and easier formation of cracks during a subsequent tensile deformation at critical temperatures. The experiments reveal a partially stronger influence of this phenomenon on the steel without Al deoxidation.
U2 - 10.1007/s00501-019-00902-0
DO - 10.1007/s00501-019-00902-0
M3 - Article
VL - 164.2019
SP - 461
EP - 465
JO - Berg- und hüttenmännische Monatshefte : BHM
JF - Berg- und hüttenmännische Monatshefte : BHM
SN - 0005-8912
IS - 11
ER -
