Local investigation of the grain boundary resistance against 3D-stage I crack propagation: Combination of stress and geometry concept - extension of models and validation of results

• Applicants: Privatdozent Dr.-Ing. Michael Marx; Professor Dr. Christian Motz
• Subject Area: Mechanical Properties of Metallic Materials and their Microstructural Origins
• Term: from 2013 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 245070991

• Final Report Year: 2018

Final Report Abstract

No abstract available

Publications

• Analysis of stage-I-crack tip strain fields by high resolution strain measurement in the SEM. Praktische Metallographie Sonderband 46, 2014
  F. Schäfer, P. Grünewald, L. Weiter, M. Thielen, M. Marx, C. Motz
  (See online at https://doi.org/10.13140/2.1.1410.2720)
• Crack initiation at twin boundaries due to slip system mismatch. Scripta Materialia, 94:48–51,2015
  A. F. Knorr, M. Marx, F. Schäfer
  (See online at https://doi.org/10.1016/j.scriptamat.2014.09.015)
• Stage-I fatigue crack studies in order to validate the dislocation-free zone model offracture for bulk materials. Philosophical Magazine, 95(8):819–843, 2015
  F. Schäfer, M. Marx, A. F. Knorr,M. Marx, H. Vehoff
  (See online at https://doi.org/10.1080/14786435.2015.1008067)
• Microscopic incompatibility controlling plastic deformation of bicrystals. Acta Materialia, 106:219–228, 2016
  N. Kheradmand, A. F. Knorr, M. Marx, Y. Deng
  (See online at https://doi.org/10.1016/j.actamat.2016.01.006)
• Quantifying the grain boundary resistance against slip transfer by experimental combination of geometric and stress approach using stage-I-fatigue cracks. Philosophical Magazine, 96(32-34):3524–3551, 2016
  F. Schäfer, L. Weiter, M. Marx, C. Motz
  (See online at https://doi.org/10.1080/14786435.2016.1235289)
• Assessing the intergranular crack initiation probability of a grain boundary distribution by an experimental misalignment study of adjacent slip systems. Procedia Structural Integrity, 5:547–554, 2017
  F. Schäfer, E. P. W. Lang, M. Bick, A. F. Knorr, M. Marx, C. Motz
  (See online at https://doi.org/10.1016/j.prostr.2017.07.161)
• Effect of a dislocation pile-up at the neutral axis on trans-crystalline crack growth for microbending fatigue. International Journal of Fatigue, 94:131–139, 2017
  L. Eisenhut, F. Schäfer, P. Grünewald, L. Weiter, M. Marx, C. Motz
  (See online at https://doi.org/10.1016/j.ijfatigue.2016.09.015)
• How to measure a dislocation’s breakthrough stress to estimate the grain boundary resistance against slip transfer based on the dfz-model of fracture. Solid State Phenomena, 258: 3–96, 2017
  F. Schäfer, M. Thielen, M. Marx, C. Motz
  (See online at https://doi.org/10.4028/www.scientific.net/SSP.258.93)
• Small scale fracture mechanics of ductile materials: advantage of fatigue precracks and comparison of J-integral evaluations. Materialia, 2018
  P. Grünewald, F. Schäfer, M. Thielen, M. Marx, C. Motz
  (See online at https://doi.org/10.1016/j.mtla.2018.09.011)