TY - JOUR

T1 - Wedge-Splitting Test on Carbon-Containing Refractories at High Temperatures

AU - Stückelschweiger, Martin

AU - Gruber, Dietmar

AU - Jin, Shengli

AU - Harmuth, Harald

PY - 2019/8/8

Y1 - 2019/8/8

N2 - The mode I fracture behavior of ordinary refractory materials is usually tested with the wedge-splitting test. At elevated temperatures, the optical displacement measurement is difficult because of the convection in the furnace and possible reactions of refractory components with the ambient atmosphere. The present paper introduces a newly developed testing device, which is able to perform such experiments up to 1500 °C. For the testing of carbon-containing refractories a gas purging, for example, with argon, is possible. Laser speckle extensometers are applied for the displacement measurement. A carbon-containing magnesia refractory (MgO-C) was selected for a case study. Based on the results obtained from tests, fracture mechanical parameters such as the specific fracture energy and the nominal notch tensile strength were calculated. An inverse simulation procedure applying the finite element method yields tensile strength, the total specific fracture energy, and the strain-softening behavior. Additionally, the creep behavior was also considered for the evaluation.

AB - The mode I fracture behavior of ordinary refractory materials is usually tested with the wedge-splitting test. At elevated temperatures, the optical displacement measurement is difficult because of the convection in the furnace and possible reactions of refractory components with the ambient atmosphere. The present paper introduces a newly developed testing device, which is able to perform such experiments up to 1500 °C. For the testing of carbon-containing refractories a gas purging, for example, with argon, is possible. Laser speckle extensometers are applied for the displacement measurement. A carbon-containing magnesia refractory (MgO-C) was selected for a case study. Based on the results obtained from tests, fracture mechanical parameters such as the specific fracture energy and the nominal notch tensile strength were calculated. An inverse simulation procedure applying the finite element method yields tensile strength, the total specific fracture energy, and the strain-softening behavior. Additionally, the creep behavior was also considered for the evaluation.

KW - Carbon-containing refractories

KW - Fracture energy

KW - Fracture parameters

KW - High-temperature wedge splitting test

KW - Reducing condition

KW - Strain-softening

UR - http://www.scopus.com/inward/record.url?scp=85070928069&partnerID=8YFLogxK

U2 - 10.3390/app9163249

DO - 10.3390/app9163249

M3 - Article

AN - SCOPUS:85070928069

VL - 9.2019

JO - Applied Sciences : open access journal

JF - Applied Sciences : open access journal

SN - 2076-3417

IS - 16

M1 - 3249

ER -