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  • Asymmetric arrangements of stored crack-wake dislocations and low values of the size ratio SR, the plastic zone size / the characteristic microstructural distance, were found to be of basic importance for the shear misfit of crack flanks causing the roughness-induced crack closure in case of plain strain conditions. The crack wake dislocations produce also the plasticity induced crack closure as a result of a near-tip mismatch perpendicular to crack flanks. According to a recently published theoretical concept, an estimation of these extrinsic shielding effects in the threshold re-gion of fatigue crack propagation was made for austenitic steel of Japan provenience. Related fa-tigue experiments were based on a standard load shedding technique associated with monitoring of the crack closure level. The surface roughness was analysed by means of the optical chromatogra-phy that enables a 3D reconstruction of fracture morphology. Calculated and measured effective threshold values of about 2.2 MPa.m1/2 are
  • Asymmetric arrangements of stored crack-wake dislocations and low values of the size ratio SR, the plastic zone size / the characteristic microstructural distance, were found to be of basic importance for the shear misfit of crack flanks causing the roughness-induced crack closure in case of plain strain conditions. The crack wake dislocations produce also the plasticity induced crack closure as a result of a near-tip mismatch perpendicular to crack flanks. According to a recently published theoretical concept, an estimation of these extrinsic shielding effects in the threshold re-gion of fatigue crack propagation was made for austenitic steel of Japan provenience. Related fa-tigue experiments were based on a standard load shedding technique associated with monitoring of the crack closure level. The surface roughness was analysed by means of the optical chromatogra-phy that enables a 3D reconstruction of fracture morphology. Calculated and measured effective threshold values of about 2.2 MPa.m1/2 are (en)
Title
  • Assessment of Extrinsic Crack Tip Shielding in Austenitic Steel near Fatigue Threshold
  • Assessment of Extrinsic Crack Tip Shielding in Austenitic Steel near Fatigue Threshold (en)
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  • Assessment of Extrinsic Crack Tip Shielding in Austenitic Steel near Fatigue Threshold
  • Assessment of Extrinsic Crack Tip Shielding in Austenitic Steel near Fatigue Threshold (en)
skos:notation
  • RIV/00216305:26210/08:PU75863!RIV10-MSM-26210___
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  • Z(MSM0021630518)
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  • 1
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  • 357137
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  • RIV/00216305:26210/08:PU75863
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  • Assessment, Extrinsic Crack Tip Shielding, Austenitic Steel, Fatigue Threshold (en)
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  • CH - Švýcarská konfederace
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  • [2962DC48B3AE]
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  • Key Engineering Materials
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  • 385-387
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  • Pokluda, Jaroslav
  • Slámečka, Karel
  • Horníková, Jana
  • Šandera, Pavel
  • Kondo, Yoshiyuki
http://linked.open...ain/vavai/riv/wos
  • 000262126000013
http://linked.open...n/vavai/riv/zamer
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  • 1013-9826
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  • 26210
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