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A Corrosion Fatigue (CF) Assessment Method for High-stressed Engine Components in Corrosive Fuels

To investigate the corrosive impact of fuels with biogenic components by performing corrosion fatigue tests on notched and un-notched specimen of stainless 17% chromium steel 1.4016 (X6Cr17) AISI430 in air and biofuel E85 ­(fuel with 85% ethanol added).

Product Number: 51317--9001-SG
ISBN: 9001 2017 CP
Author: Sven Kaefer
Publication Date: 2017
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Titel: Development and experimental verification of a corrosion fatigue (CF) assessment method for high-stressed engine components in corrosive fuelsS. Käfer T. Melz TU Darmstadt (SzM) GermanyS. Schönborn H. Kaufmann T. Melz Fraunhofer LBF GermanyT. Engler G. Andersohn M. Oechsner TU Darmstadt (MPA/IfW) GermanyG. Kripak B. Clausen H.-W. Zoch IWT Bremen GermanyAbstractA reliable power train system should be based on fatigue design including very high cycle fatigue (VHCF) effects. Engine components especially for injection systems encounter a large amount of load cycles (1·109) and are exposed to corrosive media such as fossil fuels during their lifetime. To reduce the carbon dioxide (CO2) emission fossil fuels are blended with biogenic components. Biofuels are potentially more corrosive than unblended fuels due to the hydrophobic properties of for example ethanol which is added to gasoline fuels. There is yet not much known about corrosion fatigue behavior of high-strength chromium steels in biofuels. Indeed investigations show that biofuels reduce the number of cycles to failure of engine components significantly. Therefore it is essential to investigate the corrosive impact of fuels with biogenic components by performing corrosion fatigue tests. Such effects were investigated on notched and unnotched specimen of stainless 17% chromium steel 1.4016 (X6Cr17) AISI430 in air and biofuel ? E85 ­(fuel with 85% ethanol added) ? and are the topic of this paper. The results were obtained at a stress ratio of R=0 at different testing devices under diverse frequencies (20 150 500 and 19.000 Hz) to investigate the influence. The test results represent the basis for a model which will be able to predict the impact of corrosion fatigue in the VHCF region.Keywords: Corrosion Fatigue Biofuels E85 Ethanol VHCF 1.4016 X6Cr17 AISI 430

Titel: Development and experimental verification of a corrosion fatigue (CF) assessment method for high-stressed engine components in corrosive fuelsS. Käfer T. Melz TU Darmstadt (SzM) GermanyS. Schönborn H. Kaufmann T. Melz Fraunhofer LBF GermanyT. Engler G. Andersohn M. Oechsner TU Darmstadt (MPA/IfW) GermanyG. Kripak B. Clausen H.-W. Zoch IWT Bremen GermanyAbstractA reliable power train system should be based on fatigue design including very high cycle fatigue (VHCF) effects. Engine components especially for injection systems encounter a large amount of load cycles (1·109) and are exposed to corrosive media such as fossil fuels during their lifetime. To reduce the carbon dioxide (CO2) emission fossil fuels are blended with biogenic components. Biofuels are potentially more corrosive than unblended fuels due to the hydrophobic properties of for example ethanol which is added to gasoline fuels. There is yet not much known about corrosion fatigue behavior of high-strength chromium steels in biofuels. Indeed investigations show that biofuels reduce the number of cycles to failure of engine components significantly. Therefore it is essential to investigate the corrosive impact of fuels with biogenic components by performing corrosion fatigue tests. Such effects were investigated on notched and unnotched specimen of stainless 17% chromium steel 1.4016 (X6Cr17) AISI430 in air and biofuel ? E85 ­(fuel with 85% ethanol added) ? and are the topic of this paper. The results were obtained at a stress ratio of R=0 at different testing devices under diverse frequencies (20 150 500 and 19.000 Hz) to investigate the influence. The test results represent the basis for a model which will be able to predict the impact of corrosion fatigue in the VHCF region.Keywords: Corrosion Fatigue Biofuels E85 Ethanol VHCF 1.4016 X6Cr17 AISI 430

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