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Application: Liquid Hydrogen Turbopump Vulcain space launcher

The cryogenic engines of the Vulcain space launchers has been subjected to increasingly severe operating conditions so that entirely new bearings were developed for the liquid hydrogen turbopumps. The principal axes of development, except the optimization of the bearing geometry, were related to the improvement of the mechanical properties of the X105CrMo17 steel (AISI 440C)…

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XD15NW Comparison vs. other Aerospace Alloys

A Comparison of the Mechanical and Physical Properties of Contemporary and New Alloys for Aerospace Bearing Applications Abstract: This paper presents the results of several contributing sources in establishing the mechanical and physical properties of various new candidate alloys for aerospace bearing applications. The alloys evaluated included the high Nitrogen steels Cronidur 30 and XD15NW,…

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