TY - CONF A1 - Fedelich, Bernard A1 - Epishin, A. A1 - Link, T. A1 - Klingelhöffer, Hellmuth A1 - Künecke, Georgia A1 - Portella, Pedro Dolabella ED - Huron, E.S. ED - Reed, R.C. ED - Hardy, M.C. ED - Mills, M.J. ED - Montero, R.E. ED - Portella, Pedro Dolabella ED - Telesman, J. T1 - Rafting during high temperature deformation in a single crystal superalloy: experiments and modeling T2 - Superalloys 2012 - 12th International symposium on superalloys (Proceedings) T2 - Superalloys 2012 - 12th International symposium on superalloys CY - Seven, Springs, PA, USA DA - 2012-09-09 KW - Creep KW - Single crystal KW - Rafting KW - Modeling KW - CMSX-4 KW - Low-cycle-fatigue PY - 2012 SP - 491 EP - 500 PB - Wiley AN - OPUS4-26842 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fedelich, Bernard A1 - Epishin, A. A1 - Link, T. A1 - Klingelhöffer, Hellmuth A1 - Portella, Pedro Dolabella A1 - Skrotzki, Birgit ED - Maruyama, K. ED - Abe, F. ED - Igarashi, M. ED - Kishida, K. ED - Suzuki, M. ED - Yoshimi, K. T1 - Implementation of creep induced rafting into mechanical modelling of superalloys T2 - 12th International conference on creep and fracture of engineering materials and structures (Proceedings) T2 - 12th International conference on creep and fracture of engineering materials and structures CY - Kyoto, Japan DA - 2012-05-27 KW - Single-crystal nickel-base superalloys KW - Microstructural degradation KW - Creep KW - Modelling KW - Rafting PY - 2012 SP - 1 EP - 4(?) AN - OPUS4-27564 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Fedelich, Bernard A1 - Epishin, A. A1 - Link, T. A1 - Klingelhöffer, Hellmuth A1 - Künecke, Georgia A1 - Portella, Pedro Dolabella T1 - Experimental characterization and mechanical modeling of creep induced rafting in superalloys JF - Computational materials science N2 - A constitutive model has been developed for the high temperature mechanical behavior of single crystal superalloys, including rafting and its consequences. The flow stress depends on the γ channel width via the Orowan stress. An evolution equation for channel widening during high temperature straining has been derived and calibrated with measurements. Therein, rafting is assumed to be driven by the relaxation of internal stresses. The model is able to represent the mechanical softening at high stresses consecutive to rafting. The model has been applied to simulate rafting during uniaxial creep in several crystal orientations, in notched specimens as well as in cyclically loaded specimens. KW - Single crystal KW - Superalloys KW - Rafting KW - Creep KW - Viscoplasticity KW - Constitutive law PY - 2012 DO - https://doi.org/10.1016/j.commatsci.2012.05.071 SN - 0927-0256 VL - 64 SP - 2 EP - 6 PB - Elsevier CY - Amsterdam AN - OPUS4-26401 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -