Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded
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2007
Authors
Dobrojević, M.Rakin, Marko

Gubeljak, Nenad
Cvijović, Ivana

Zrilić, Milorad

Krunich, N.
Sedmak, Aleksandar

Article (Published version)

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In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations... of void volume fraction in front of the crack tip.
Keywords:
constraint effect / ductile fracture / high-strength low-alloyed steel / micromechanical model / mismatched welded jointSource:
Research Trends in Contemporary Materials Science, 2007, 555, 571-Publisher:
- Trans Tech Publications Ltd, Durnten-Zurich
Funding / projects:
- Specijalne teme mehanike loma materijala (RS-144027)
- Slo-Ser
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Dobrojević, M. AU - Rakin, Marko AU - Gubeljak, Nenad AU - Cvijović, Ivana AU - Zrilić, Milorad AU - Krunich, N. AU - Sedmak, Aleksandar PY - 2007 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1131 AB - In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip. PB - Trans Tech Publications Ltd, Durnten-Zurich T2 - Research Trends in Contemporary Materials Science T1 - Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded EP - SP - 571 VL - 555 DO - 10.4028/www.scientific.net/MSF.555.571 ER -
@article{ author = "Dobrojević, M. and Rakin, Marko and Gubeljak, Nenad and Cvijović, Ivana and Zrilić, Milorad and Krunich, N. and Sedmak, Aleksandar", year = "2007", abstract = "In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect on crack growth initiation in mismatched welded joints. The single-edged notched bend specimens (precrack length a(0)/W=0.32) were experimentally and numerically analyzed. The coupled micromechanical model proposed by Gurson, Tvergaard and Needleman was used. Constraint effect was tested by varying widths of the welded joints (6, 12 and 18mm). High-strength low-alloyed (HSLA) steel was used as the base metal in a quenched and tempered condition. The flux-cored are-welding process in shielding gas was used. Two different fillers were selected to obtain over- and undermatched weld metal. The micromechanical parameters used in prediction of the crack growth initiation on precracked specimen were calibrated on a round smooth specimen. The difference in fracture behavior between over- and undermatched welded joints obtained in experimental results was followed by numerical computations of void volume fraction in front of the crack tip.", publisher = "Trans Tech Publications Ltd, Durnten-Zurich", journal = "Research Trends in Contemporary Materials Science", title = "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded", pages = "-571", volume = "555", doi = "10.4028/www.scientific.net/MSF.555.571" }
Dobrojević, M., Rakin, M., Gubeljak, N., Cvijović, I., Zrilić, M., Krunich, N.,& Sedmak, A.. (2007). Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science Trans Tech Publications Ltd, Durnten-Zurich., 555, 571-. https://doi.org/10.4028/www.scientific.net/MSF.555.571
Dobrojević M, Rakin M, Gubeljak N, Cvijović I, Zrilić M, Krunich N, Sedmak A. Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded. in Research Trends in Contemporary Materials Science. 2007;555:571-. doi:10.4028/www.scientific.net/MSF.555.571 .
Dobrojević, M., Rakin, Marko, Gubeljak, Nenad, Cvijović, Ivana, Zrilić, Milorad, Krunich, N., Sedmak, Aleksandar, "Micromechanical analysis of constraint effect on fracture initiation in strength mismatched welded" in Research Trends in Contemporary Materials Science, 555 (2007):571-, https://doi.org/10.4028/www.scientific.net/MSF.555.571 . .