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  • 1. Bossel, C.
    et al.
    Dutta, Joydeep
    Laboratoire de Technologie des Poudres, Département des Matériaux, Ecole Polytechnique Fédérale de Lausanne, Switzerland.
    Houriet, R.
    Hilborn, J.
    Hofmann, H.
    Processing of nano-scaled silicon powders to prepare slip cast structural ceramics1995In: Journal of Materials Science and Engineering: A, ISSN 2161-6213, Vol. 204, no 1-2, p. 107-112Article in journal (Refereed)
  • 2.
    Larsson, Per-Lennart
    et al.
    KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
    Giannakopoulos, A. E.
    KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
    Tensile stresses and their implication to cracking at pyramid indentation of pressure-sensitive hard metals and ceramics1998In: Journal of Materials Science and Engineering: A, ISSN 2161-6213, Vol. 254, no 1-2, p. 268-281Article in journal (Refereed)
  • 3.
    Shen, Rickard
    et al.
    KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
    Efsing, Pål
    KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). Ringhals AB, Sweden.
    Ström, Valter
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
    Spatial correlation between local misorientations and nanoindentation hardness in nickel-base alloy 6902016In: Journal of Materials Science and Engineering: A, ISSN 2161-6213, Vol. 674, p. 171-177Article in journal (Refereed)
    Abstract [en]

    Misorientation increases with plastic strain in metals, and this observation has been used as an empirical assessment of plastic strain in recent years. The method has been validated for a sample area corresponding to a 100 µm×100 µm square, but on the micrometer scale misorientations no longer seem to correlate with plastic strain. Misorientations are however not dependent on plastic strain but rather on dislocation density, which means it should also be related to hardness. Therefore, we have in this work compared maps of predicted hardness calculated from misorientation determination with maps of actual hardness measured by nanoindentation. It was shown that the predicted and measured hardness maps do indeed correlate spatially in nickel-base Alloy 690, although the measured values have a significantly smaller hardness variation. This is explained by a presumably high and uniform density of statistically stored dislocations, which contribute to hardness but do not affect the misorientation determination from electron backscatter diffraction. Thus local misorientation can be used to qualitatively map the local effective plastic strain distribution, for example to identify regions of increased hardness.

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