Rolling Contact Fatigue Life and Spall Propagation of AISI M50, M50NiL, and AISI 52100, Part I: Experimental Results

Rosado, Lewis; Forster, Nelson H.; Thompson, Kevin L.; Cooke, Jason

doi:10.1080/10402000903226366

Cited by 80 publications

(54 citation statements)

References 27 publications

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“…Surface modification can efficiently improve the surface mechanical properties of bearing materials, in terms of reducing the friction coefficient and improving wear resistance. In recent years, new surface modification technologies have been developed for application to bearings in order to improve the performance of main shaft bearings in aero engines operating under harsh environments [3,4,5,6]. …”

Section: Introductionmentioning

confidence: 99%

Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Jin

Shao

2017

Materials

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M50 bearing steels were alternately implanted with Ti+ and N+ ions using solid and gas ion sources of implantation system, respectively. N-implantation was carried out at an energy of about 80 keV and a fluence of 2 × 1017 ions/cm2, and Ti-implantation at an energy of about 40–90 keV and a fluence of 2 × 1017 ions/cm2. The microstructures of modification layers were analyzed by grazing-incidence X-ray diffraction, auger electron spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The results showed that the gradient structure was formed under the M50 bearing steel subsurface, along the ion implantation influence zone composed of amorphous, nanocrystalline, and gradient-refinement phases. A layer of precipitation compounds like TiN is formed. In addition, nano-indentation hardness and tribological properties of the gradient structure subsurface were examined using a nano-indenter and a friction and wear tester. The nano-indentation hardness of N + Ti-co-implanted sample is above 12 GPa, ~1.3 times than that of pristine samples. The friction coefficient is smaller than 0.2, which is 22.2% of that of pristine samples. The synergism between precipitation-phase strengthening and gradient microstructure is the main mechanism for improving the mechanical properties of M50 materials.

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Section: Introductionmentioning

confidence: 99%

Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Jin

Shao

2017

Materials

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“…The objective of this research project, at the University of Florida (UF), are to model the elastic-plastic stress field associated with loaded region undergoing spall propagation using 3D FEA and gain an mechanistic understanding of the damage evolution due to RCF in the spall region. Parallel research efforts at AFRL, Dayton, OH and UES, Inc., Dayton, OH, have shown that M50 and M50 NiL not only have longer life than 52100 but also have slower propagation rate (6). Examination of the microstructure of the steel is being performed to gain insight into the effects of alloy content, heat treatment, and applied stress field and their effects on the microstructure and ultimately the life and propagation rate.…”

Section: Numer Ical Analysis Of Bear Ing Per For Mance and Power Lossmentioning

confidence: 99%

“…Once the spall spans the axial width of the raceway propagation is seen to proceed in the direction away from the initial spall leading edge, in the circumferential direction. Figure 2 summarizes aspects of the complex interplay between maximum Hertz stress, material selection and spall propagation rate, as measured by bearing mass loss (6). Tests were conducted at the same temperature for both 52100 and M50 NiL materials.…”

Section: Spall Propagation Characteristicsmentioning

confidence: 99%

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Propulsion and Power Rapid Response R&D Support. Task Order 0006: Engineering Research, Testing, and Technical Analyses of Advanced Propulsion Combustion Concepts, Mechanical Systems, Lubricants and Fuels: Mechanical Systems

Klein¹

2009

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY)2. REPORT TYPE 3. DATES COVERED (From -To) (1) The objective of the first study conducted by Texas A&M University was to measure the (bump) structure deflections for increasing applied static loads on a foil gas bearing (FB) and to estimate the static stiffness of the whole FB with and without a shaker connection. Displacement versus static force testing was performed and data is reported.(2) The objective of the second study conducted by Purdue University was to investigate bearing performance and power loss for various cage, race and rolling element materials. The investigation focused on the power loss at the race-to-cage and ball-to-cage contacts. Power loss parameters and bearing element state data are provided.(3) The objective of the third study conducted by PKG, Inc. was to conduct geometric modeling of race defects. ADORE software was used as the baseline tool. Results, (defect, heat generation ratio, and cage wear ratio) were tabulated and were reported in a presentation type final report.(4) The objective of the fourth study conducted by the University of Florida was to model the elastic-plastic stress field associated with the loaded region undergoing spall propagation using 3D FEA and gain a mechanistic understanding of the damage evolution due to RCF in the spall region. 3D FE stress analysis in the spall neighborhood, simplified trailing edge impact stress analysis, dynamic finite element impact analysis of the ball with the spall edge using ABAQUS Explicit, and spall propagation testing was accomplished; results and hypotheses are reported. The Universal Technology Corporation (UTC) and their subcontractors accomplished and supported a variety of research studies and research projects related to mechanical systems. The following discussion is organized by activity and project. Identification of Stiffness & Damping Coefficients in Foil Bear ingsThe Texas Engineering Experiment Station of Texas A&M University accomplished research to characterize quantitatively (gas) foil bearing rotordynamic performance, reliability, and durability. Reliable methods for identification of stif...

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“…They report coating-cohesive failure of 750 nm thick TiN running against softer 12.7 mm diameter ANSI M50 steel balls due to interface initiated spall in the TiN coating. Rosado et al (2010) sought more understanding of the spall growth process once a spall has occurred and identify material parameters to optimize and improve spall growth resistance. For contact stress of 2.41 GPa, they report slower spall growth in ANSI M50 compared with either ANSI M50NiL or ANSI 52100 due to material composition and processing.…”

Section: Introductionmentioning

confidence: 99%

Rolling Contact Fatigue in Ultra High Vacuum

Danyluk¹,

Dhingra²

2012

Performance Evaluation of Bearings

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Rolling Contact Fatigue Life and Spall Propagation of AISI M50, M50NiL, and AISI 52100, Part I: Experimental Results

Cited by 80 publications

References 27 publications

Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Graded Microstructure and Mechanical Performance of Ti/N-Implanted M50 Steel with Polyenergy

Propulsion and Power Rapid Response R&D Support. Task Order 0006: Engineering Research, Testing, and Technical Analyses of Advanced Propulsion Combustion Concepts, Mechanical Systems, Lubricants and Fuels: Mechanical Systems

Rolling Contact Fatigue in Ultra High Vacuum

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