X-ray diffraction analysis of three-dimensional residual stress fields reveals origins of thermal fatigue in uncoated and coated steel

Synchrotron X-ray diffraction analysis of three-dimensional residual stress fields in laser-pulsed uncoated and CrN-coated steels was performed by a combination of two complementary synchrotron approaches. In the uncoated steel, the measurements revealed crater-like tensile stress distributions clos...

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Bibliographic Details
Published in:Scripta materialia 2010-05, Vol.62 (10), p.774-777
Main Authors: Kirchlechner, C., Martinschitz, K.J., Daniel, R., Mitterer, C., Donges, J., Rothkirch, A., Klaus, M., Genzel, C., Keckes, J.
Format: Article
Language:English
Subjects:
Coating
Residual stress
Steel
Thermal fatigue
X-ray diffraction
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Summary:Synchrotron X-ray diffraction analysis of three-dimensional residual stress fields in laser-pulsed uncoated and CrN-coated steels was performed by a combination of two complementary synchrotron approaches. In the uncoated steel, the measurements revealed crater-like tensile stress distributions close to thermal cracks. For the coated samples, a regular Gaussian distribution was observed for steel whereby a cracking occurs in CrN as a consequence of steel buckling. The data also revealed the mechanism by which hard coatings protect steel from thermal fatigue.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.02.006