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Microstrain accumulation in multiphase superalloys

Published online by Cambridge University Press:  06 March 2012

J. Repper ,
M. Hofmann ,
C. Krempaszky ,
R. C. Wimpory ,
W. Petry  and
E. Werner
J. Repper
Affiliation:
Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), TU München, D-85747 Garching, Germany
M. Hofmann
Affiliation:
Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), TU München, D-85747 Garching, Germany
C. Krempaszky
Affiliation:
Christian-Doppler-Labor für Werkstoffmechanik von Hochleistungslegierungen, TU München, D-85747 Garching, Germany
R. C. Wimpory
Affiliation:
Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin Wannsee, Germany
W. Petry
Affiliation:
Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), TU München, D-85747 Garching, Germany
E. Werner
Affiliation:
Lehrstuhl für Werkstoffkunde und Werkstoffmechanik, TU München, D-85747 Garching, Germany
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Abstract

Four matrix-phase crystallographic directions of IN718 are investigated by in situ tensile tests using neutron diffraction. The elastic diffraction constants for all directions measured are compared to theoretical values calculated by the Kröner model. The differences between the microscopic and the macroscopic material response are given. The accumulation of microstrains in the different crystallographic directions is discussed. A comparison between the results of a single phase material (ingot IN718) and two differently thermal treated multiphase materials is presented.

Keywords

residual stressesintergranular microstrainsneutron diffractionmultiphase alloyIN718
Type
Applications Of Residual Stress Analysis
Information
Powder Diffraction , Volume 24 , Supplement S1 , June 2009 , pp. S65 - S67
Copyright
Copyright © Cambridge University Press 2009

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