TY - JOUR

T1 - Experimental analysis of anisotropic damage in dual-phase steel by resonance measurement

AU - Gerstein, Gregory

AU - Clausmeyer, Till

AU - Isik, Kerim

AU - Nürnberger, Florian

AU - Tekkaya, A. Erman

AU - Bruchanov, Arkadii A.

AU - Maier, Hans J.

N1 - Funding information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors gratefully acknowledge funding by the German Research Foundation (DFG) within the scope of the Transregional Collaborative Research Centre on sheet-bulk metal forming (SFB/TR 73) in the subproject C4 ‘‘Analysis of load history dependent evolution of damage and microstructure for the numerical design of sheet-bulk metal forming processes.’’

PY - 2016/5/19

Y1 - 2016/5/19

N2 - The ductile damage in deformed dual-phase steel sheets (DP600) was investigated based on measurements of the degradation of the direction-dependent Young's modulus. The study focuses on the material-induced damage anisotropy in such advanced high-strength steel. The elastic properties in the direction of applied loading of the deformed sheets were determined by measuring the resonance frequency of rectangular samples. The material was investigated in the as-delivered condition and after annealing at 220 for 48 h. Tensile strains of up to 10% were applied after annealing. Tensile tests were performed in different directions with respect to the rolling direction to determine the evolution of damage in different directions. The comparison of the obtained results with the electron micrographs shows that the damage in the steel sheets occurs in the form of nano and micro damages near the grain boundary and interfaces of phases. The maximum decrease of the Young's modulus in the transverse direction was observed for the largest applied deformation of 10% tensile strain in the transverse direction. An efficient calculation method to obtain information on the distribution of anisotropy in the plane of the sheet was applied. This calculation method relies on an efficient representation of the material's texture. In order to assess the influence of texture, the texture was determined experimentally.

AB - The ductile damage in deformed dual-phase steel sheets (DP600) was investigated based on measurements of the degradation of the direction-dependent Young's modulus. The study focuses on the material-induced damage anisotropy in such advanced high-strength steel. The elastic properties in the direction of applied loading of the deformed sheets were determined by measuring the resonance frequency of rectangular samples. The material was investigated in the as-delivered condition and after annealing at 220 for 48 h. Tensile strains of up to 10% were applied after annealing. Tensile tests were performed in different directions with respect to the rolling direction to determine the evolution of damage in different directions. The comparison of the obtained results with the electron micrographs shows that the damage in the steel sheets occurs in the form of nano and micro damages near the grain boundary and interfaces of phases. The maximum decrease of the Young's modulus in the transverse direction was observed for the largest applied deformation of 10% tensile strain in the transverse direction. An efficient calculation method to obtain information on the distribution of anisotropy in the plane of the sheet was applied. This calculation method relies on an efficient representation of the material's texture. In order to assess the influence of texture, the texture was determined experimentally.

KW - anisotropy

KW - Dual-phase steel

KW - ductile damage

KW - dynamic Young's modulus

KW - resonance frequency

UR - http://www.scopus.com/inward/record.url?scp=85029815892&partnerID=8YFLogxK

U2 - 10.1177/1056789516650245

DO - 10.1177/1056789516650245

M3 - Article

AN - SCOPUS:85029815892

VL - 26

SP - 1147

EP - 1169

JO - International Journal of Damage Mechanics

JF - International Journal of Damage Mechanics

SN - 1056-7895

IS - 8

ER -