On the influence of residual stresses in determining the micro-yield stress profile in a nitrided steel by nano-indentation
| Autor: | Daniel Nelias, Alain Vincent, Daniel Girodin, G. Lormand, Christophe Jacq |
|---|---|
| Přispěvatelé: | Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Colin, Anne-Marie, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Mateis, Laboratoire |
| Rok vydání: | 2003 |
| Předmět: |
Measurement point
Materials science Mechanical Engineering Metallurgy 02 engineering and technology [SPI.MAT] Engineering Sciences [physics]/Materials Nanoindentation 021001 nanoscience & nanotechnology Condensed Matter Physics [SPI.MAT]Engineering Sciences [physics]/Materials 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Residual stress Stress profile General Materials Science Composite material 0210 nano-technology Material properties ComputingMilieux_MISCELLANEOUS Nitriding |
| Zdroj: | Materials Science and Engineering Materials Science and Engineering, Elsevier, 2003, pp.311-319 Materials Science and Engineering: A Materials Science and Engineering: A, Elsevier, 2003, pp.311-319 |
| ISSN: | 0921-5093 0025-5416 |
| DOI: | 10.1016/s0921-5093(02)00309-x |
| Popis: | A new method has recently been developed for obtaining the local micro-plasticity properties of materials from nano-indentation measurements. This method is based upon the measurement and analysis of remanent displacement e r versus the maximum load W , produced during successive nano-indentation loading-unloading cycles at an increasing W . The present paper is concerned with the influence of residual stresses in determining the local micro-yield stress using this method. First, the influence of residual stresses on e r is evidenced experimentally on nitrided 32CrMoV13 samples by studying the effect of the redistribution of residual stress that occurs when the initial component is sectioned in different ways. Second, the actual residual stress at any measurement point is calculated for every sample configuration. This is achieved by identifying the volume dilatation strain profile in the nitrided layer. Third, the influence of residual stresses on e r is simulated using a three-dimensional elasto-plastic contact code. In this way, we obtain the remanent displacement that would be measured if the material were free of residual stress. We then propose a new method for obtaining the local micro-yield stress in the presence of residual stresses. This method is then applied to the determination of the intrinsic micro-yield stress profile of nitrided 32CrMoV13 steel. The results show that in some specific configurations the micro-yield stress may be overestimated by some 20%. |
| Databáze: | OpenAIRE |
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