The Role of Grain Boundary Oxidation on Surface Crack Formation under Continuous Casting Conditions

Roman Krobath; Christian Bernhard; Sergiu Ilie; Jakob Six; Susanne Hahn; Paul Pennerstorfer

doi:10.1007/s00501-019-00902-0

The Role of Grain Boundary Oxidation on Surface Crack Formation under Continuous Casting Conditions

Roman Krobath, Christian Bernhard, Sergiu Ilie, Jakob Six, Susanne Hahn, Paul Pennerstorfer

Chair of Ferrous Metallurgy (220)

Research output: Contribution to journal › Article › Research › peer-review

Abstract

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.

Translated title of the contribution	Die Rolle von Korngrenzenoxidation auf die Oberflächenrissbildung unter Stranggießbedingungen
Original language	English
Pages (from-to)	461-465
Number of pages	5
Journal	Berg- und hüttenmännische Monatshefte : BHM
Volume	164.2019
Issue number	11
DOIs	https://doi.org/10.1007/s00501-019-00902-0
Publication status	Published - 2 Oct 2019

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10.1007/s00501-019-00902-0

Cite this

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title = "The Role of Grain Boundary Oxidation on Surface Crack Formation under Continuous Casting Conditions",

abstract = "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.",

author = "Roman Krobath and Christian Bernhard and Sergiu Ilie and Jakob Six and Susanne Hahn and Paul Pennerstorfer",

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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.

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DO - 10.1007/s00501-019-00902-0

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