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

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
  
• Crack initiation at twin boundaries due to slip system mismatch. Scripta Materialia, 94:48–51,2015
  Knorr, Alain Franz; Marx, Michael & Schaefer, Florian
  
• 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
  Schaefer, Florian; Marx, Michael; Knorr, Alain Franz & Vehoff, Horst
  
• 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
  Schaefer, Florian; Thielen, Matthias; Marx, Michael & Motz, Christian
  
• Microscopic incompatibility controlling plastic deformation of bicrystals. Acta Materialia, 106:219–228, 2016
  Kheradmand, Nousha; Knorr, Alain Franz; Marx, Michael & Deng, Yun
  
• 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
  Schäfer, Florian; Weiter, Laura; Marx, Michael & Motz, Christian
  
• 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
  Schaefer, Florian; Lang, Eric P.W.; Bick, Michael; Knorr, Alain F.; Marx, Michael & Motz, Christian
  
• 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
  Eisenhut, Lena; Schaefer, Florian; Gruenewald, Patrick; Weiter, Laura; Marx, Michael & Motz, Christian
  
• Small scale fracture mechanics of ductile materials: advantage of fatigue precracks and comparison of J-integral evaluations. Materialia, 2018
  Gruenewald, Patrick; Schaefer, Florian; Thielen, Matthias; Marx, Michael & Motz, Christian