6 research outputs found

    Sensitization to Corrosion as Initiator of Fatigue Fracture in Compressor Blades

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    Certain failures of stainless steels interpreted purely in terms of fracture mechanisms may in fact be closely associated with previous damage caused by localized corrosion. The closeness of the link between fatigue and corrosion is documented by the case history of compressor blades made of grade 14Cr17Ni2 (X14CrNi17-2) stainless steel. Fatigue fracturing observed in areas near the blade root tended to follow intergranular pathways, indicating that some additional mechanism other than fatigue might be involved. This suspicion was confirmed by electrochemical potentiokinetic reactivation (EPR) measurements in situ, which revealed sensitization to intergranular corrosion. It has been found that at the transition between the blade root and the blade proper the surfaces had been ground and polished too vigorously, heating the subcutaneous layers to within the danger zone of 400-600°C. Preferential integranular attack in these locations was the initiation mechanism that provoked a subsequent failure of the blades by fatigue fracture

    New national and regional bryophyte records, 42

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    none46New record of Plagiothecium denticulatum var. obtusifolium from the Parco dell’Aveto (Liguria, Province of Genova).Ellis, L. T.; Aleffi, M.; Bakalin, V. A.; Bednarek-Ochyra, H.; Bergamini, A.; Beveridge, P.; Choi, S. S.; Fedosov, V. E.; Gabriel, R.; Gallego, M. T.; Grdović, S.; Gupta, R.; Nath, V.; Asthana, A. K.; Jennings, L.; KĂŒrschner, H.; Lebouvier, M.; Nair, M. C.; Manjula, K. M.; Rajesh, K. P.; Nobis, M.; Nowak, A.; Park, S. J.; Sun, B-Y.; PlĂĄĆĄek, V.; Číhal, L.; Poponessi, S.; Mariotti, M.; Sabovljević, A.; Sabovljević, M. S.; Sawicki, J.; Schnyder, N.; Schumacker, R.; Sim-Sim, M.; Singh, D. K.; Singh, D.; Majumdar, S.; Singh Deo, S.; ƞtefănuĆŁ, S.; Suleiman, M.; Seng, C. M.; Chua, M. S.; Våƈa, J.; Venanzoni, R.; Bricchi, E.; Wigginton, M. J.Ellis, L. T.; Aleffi, M.; Bakalin, V. A.; Bednarek Ochyra, H.; Bergamini, A.; Beveridge, P.; Choi, S. S.; Fedosov, V. E.; Gabriel, R.; Gallego, M. T.; Grdović, S.; Gupta, R.; Nath, V.; Asthana, A. K.; Jennings, L.; KĂŒrschner, H.; Lebouvier, M.; Nair, M. C.; Manjula, K. M.; Rajesh, K. P.; Nobis, M.; Nowak, A.; Park, S. J.; Sun, B. Y.; PlĂĄĆĄek, V.; Číhal, L.; Poponessi, S.; Mariotti, Mauro; Sabovljević, A.; Sabovljević, M. S.; Sawicki, J.; Schnyder, N.; Schumacker, R.; Sim Sim, M.; Singh, D. K.; Singh, D.; Majumdar, S.; Singh Deo, S.; ƞtefănuĆŁ, S.; Suleiman, M.; Seng, C. M.; Chua, M. S.; Våƈa, J.; Venanzoni, R.; Bricchi, E.; Wigginton, M. J

    Do patient and ward-related characteristics influence the use of coercive measures? Results from the EUNOMIA international study

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    This study was funded by a grant from the European Commission (Quality of Life and Management of Living Resources Programme, contract number QLG4-CT-2002-01036
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