Surface Fatigue Lives Of Case Carburized Gears With An Improved Surface Finish

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Surface Fatigue Lives of Case-Carburized Gears With an Improved Surface Finish

Author :
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Surface Fatigue Lives of Case-Carburized Gears With an Improved Surface Finish by :

Download or read book Surface Fatigue Lives of Case-Carburized Gears With an Improved Surface Finish written by and published by . This book was released on 2000 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous research provides qualitative evidence that an improved surface finish can increase the surface fatigue lives of gears. To quantify the influence of surface roughness on life, a set of AISI 9310 steel gears was provided with a near-mirror finish by superfinishing. The effects of the superfinishing on the quality of the gear tooth surfaces were determined using data from metrology, profilometry, and interferometric microscope inspections. The superfinishing reduced the roughness average by about a factor of 5. The superfinished gears were subjected to surface fatigue testing at 1.71-GPa (248-ksi) Hertz contact stress, and the data were compared with the NASA Glenn gear fatigue data base. The lives of gears with superfinished teeth were about four times greater compared with the lives of gears with ground teeth but with otherwise similar quality.

Increased Surface Fatigue Lives of Spur Gears by Application of a Coating

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)

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Book Synopsis Increased Surface Fatigue Lives of Spur Gears by Application of a Coating by :

Download or read book Increased Surface Fatigue Lives of Spur Gears by Application of a Coating written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard coatings have potential for increasing gear surface fatigue lives. Experiments were conducted using gears both with and without a metal-containing, carbon-based coating. The gears were case-carburized AISI 9310 steel spur gears. Some gears were provided with the coating by magnetron sputtering. Lives were evaluated by accelerated life tests. For uncoated gears, all of fifteen tests resulted in fatigue failure before completing 275 million revolutions. For coated gears, eleven of the fourteen tests were suspended with no fatigue failure after 275 million revolutions. The improved life owing to the coating, approximately a six-fold increase, was a statistically significant result.

The Influence of Roughness on Gear Surface Fatigue

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721150212
Total Pages : 188 pages
Book Rating : 4.1/5 (52 download)

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Book Synopsis The Influence of Roughness on Gear Surface Fatigue by : National Aeronautics and Space Administration (NASA)

Download or read book The Influence of Roughness on Gear Surface Fatigue written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gear working surfaces are subjected to repeated rolling and sliding contacts, and often designs require loads sufficient to cause eventual fatigue of the surface. This research provides experimental data and analytical tools to further the understanding of the causal relationship of gear surface roughness to surface fatigue. The research included evaluations and developments of statistical tools for gear fatigue data, experimental evaluation of the surface fatigue lives of superfinished gears with a near-mirror quality, and evaluations of the experiments by analytical methods and surface inspections. Alternative statistical methods were evaluated using Monte Carlo studies leading to a final recommendation to describe gear fatigue data using a Weibull distribution, maximum likelihood estimates of shape and scale parameters, and a presumed zero-valued location parameter. A new method was developed for comparing two datasets by extending the current methods of likelihood-ratio based statistics. The surface fatigue lives of superfinished gears were evaluated by carefully controlled experiments, and it is shown conclusively that superfinishing of gears can provide for significantly greater lives relative to ground gears. The measured life improvement was approximately a factor of five. To assist with application of this finding to products, the experimental condition was evaluated. The fatigue life results were expressed in terms of specific film thickness and shown to be consistent with bearing data. Elastohydrodynamic and stress analyses were completed to relate the stress condition to fatigue. Smooth-surface models do not adequately explain the improved fatigue lives. Based on analyses using a rough surface model, it is concluded that the improved fatigue lives of superfinished gears is due to a reduced rate of near-surface micropitting fatigue processes, not due to any reduced rate of spalling (sub-surface) fatigue processes. To complete the evaluations, surface insp

Studies on Improvement of Surface Durability of Case-Carburized Steel Gear - Effects of Surface Finish Processes Upon Oil Film Formation

Download Studies on Improvement of Surface Durability of Case-Carburized Steel Gear - Effects of Surface Finish Processes Upon Oil Film Formation PDF Online Free

Author : M. Hashimoto
Publisher :
ISBN 13 : 9781555897277
Total Pages : 9 pages
Book Rating : 4.8/5 (972 download)

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Book Synopsis Studies on Improvement of Surface Durability of Case-Carburized Steel Gear - Effects of Surface Finish Processes Upon Oil Film Formation by : M. Hashimoto

Download or read book Studies on Improvement of Surface Durability of Case-Carburized Steel Gear - Effects of Surface Finish Processes Upon Oil Film Formation written by M. Hashimoto and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Tribology and Surface Engineering

Author : Aleksander Lisiecki
Publisher : MDPI
ISBN 13 : 3039280848
Total Pages : 174 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Tribology and Surface Engineering by : Aleksander Lisiecki

Download or read book Tribology and Surface Engineering written by Aleksander Lisiecki and published by MDPI. This book was released on 2020-01-15 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers very important issues, not only scientific in nature but, ultimately, for industry and the economy. Wear and deterioration of surface properties during operation is a natural and unavoidable phenomenon. However, minimizing the degree of wear is of great importance for the entire economy, as illustrated by the example of the US economy, for which the loss of natural resources as a direct cause of friction and wear exceeds 6% of the Gross National Product. This book showcases the valuable knowledge revealed from both theoretical and practical research results in the field of advanced technologies of coatings and surface modification, as well as wear and tribological characteristics of advanced materials and surface layers. Therefore, it is hoped that this book will be a valuable resource and helpful tool for scientists, engineers, and students in the field of surface engineering, materials science, and manufacturing engineering.

Improvement in Surface Fatigue Life of Hardened Gears by High-Intensity Shot Peening

Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Improvement in Surface Fatigue Life of Hardened Gears by High-Intensity Shot Peening by :

Download or read book Improvement in Surface Fatigue Life of Hardened Gears by High-Intensity Shot Peening written by and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two groups of carburized, hardened, and ground spur gears that were manufactured from the same heat of vacuum-induction-melted-vacuum-arc-remelted (VIM-VAR) AISI 9-310 steel were endurance tested for surface fatigue. Both groups were manufactured with a standard ground 16-rms surface finish. One group was subjected to a shot-peening intensity of 7 to 9A, and the second group was subjected to a shot-peening intensity of 15 to 17A. All gears were honed after shot peening to a surface finish of 16 rms. The gear pitch diameter was 8.89 cm (3.5 in.). Test conditions were a maximum Hertz stress of 1.71 GPa (248 ksi), a gear temperature of 350 K (170 deg F), and a speed of 10 000 rpm. The lubricant used for the tests was a synthetic paraffinic oil with an additive package. The following results were obtained: The 10-percent surface fatigue (pitting) life of the high-intensity (15 to 17A) shot-peened gears was 2.15 times that of the medium-intensity (7 to 9A) shot-peened gears, the same as that calculated from measured residual stress at a depth of 127 microns (5 mil). The measured residual stress for the high-intensity-shot-peened gears was 57 percent higher than that for the medium-intensity-shot-peened gears at a depth of 127 micro (5 mi) and 540 percent higher at a depth of 51 micro (2 mil).

The Surface Fatigue Life of Contour Induction Hardened AISI 1552 Gears

Author : Dennis P. Townsend
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis The Surface Fatigue Life of Contour Induction Hardened AISI 1552 Gears by : Dennis P. Townsend

Download or read book The Surface Fatigue Life of Contour Induction Hardened AISI 1552 Gears written by Dennis P. Townsend and published by . This book was released on 1995 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bench Testing of Industrial Fluid Lubrication and Wear Properties Used in Machinery Applications

Author : George E. Totten
Publisher : ASTM International
ISBN 13 : 0803128673
Total Pages : 338 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis Bench Testing of Industrial Fluid Lubrication and Wear Properties Used in Machinery Applications by : George E. Totten

Download or read book Bench Testing of Industrial Fluid Lubrication and Wear Properties Used in Machinery Applications written by George E. Totten and published by ASTM International. This book was released on 2001 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the selection of bench tests and testing conditions to model the lubrication and wear properties of fluids used in industrial machines and components, such as compressors, pumps, chain drives, transmissions, and bearings. Based on a June 2000 symposium held in Seattle, the 23 papers are di

Powder Metallurgy Technology

Author : G. S. Upadhyaya
Publisher : Cambridge Int Science Publishing
ISBN 13 : 1898326401
Total Pages : 174 pages
Book Rating : 4.8/5 (983 download)

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Book Synopsis Powder Metallurgy Technology by : G. S. Upadhyaya

Download or read book Powder Metallurgy Technology written by G. S. Upadhyaya and published by Cambridge Int Science Publishing. This book was released on 1997 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Contents1 INTRODUCTION; 2 METAL POWDER PRODUCTION; 3 METAL POWDER CHARACTERISTICS; 4 METAL POWDER TRE-AMENT; 5 METAL POWDER COMPACT-ION; 6 SINTERING; 7 HOT CONSOLIDATION; 8 SECONDARY TREATMENT; 9 POWDER INJECTION MOULDING; 10 QUALITY CONTROL OF POWDER METALLURGY MATERIALS.

New Directions in Lubrication, Materials, Wear, and Surface Interactions

Author : William R. Loomis
Publisher : William Andrew
ISBN 13 :
Total Pages : 878 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis New Directions in Lubrication, Materials, Wear, and Surface Interactions by : William R. Loomis

Download or read book New Directions in Lubrication, Materials, Wear, and Surface Interactions written by William R. Loomis and published by William Andrew. This book was released on 1985 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Power Transmissions

Author : Datong Qin
Publisher : CRC Press
ISBN 13 : 1315386801
Total Pages : 2126 pages
Book Rating : 4.3/5 (153 download)

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Book Synopsis Power Transmissions by : Datong Qin

Download or read book Power Transmissions written by Datong Qin and published by CRC Press. This book was released on 2016-11-10 with total page 2126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents papers from the International Conference on Power Transmissions 2016, held in Chongqing, China, 27th-30th October 2016. The main objective of this conference is to provide a forum for the most recent advances, addressing the challenges in modern mechanical transmissions. The conference proceedings address all aspects of gear and power transmission technology and a range of applications. The presented papers are catalogued into three main tracks, including design, simulation and testing, materials and manufacturing, and industrial applications. The design, simulation and testing track covers topics such as new methods and designs for all types of transmissions, modelling and simulation of power transmissions, strength, fatigue, dynamics and reliability of power transmissions, lubrication and sealing technologies and theories, and fault diagnosis of power transmissions. In the materials and manufacturing track, topics include new materials and heat treatment of power transmissions, new manufacturing technologies of power transmissions, improved tools to predict future demands on production systems, new technologies for ecologically sustainable productions and those which preserve natural resources, and measuring technologies of power transmissions. The proceedings also cover the novel industrial applications of power transmissions in marine, aerospace and railway contexts, wind turbines, the automotive industry, construction machinery, and robots.

Surface Integrity in Machining

Author : J. Paulo Davim
Publisher : Springer Science & Business Media
ISBN 13 : 1848828748
Total Pages : 222 pages
Book Rating : 4.8/5 (488 download)

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Book Synopsis Surface Integrity in Machining by : J. Paulo Davim

Download or read book Surface Integrity in Machining written by J. Paulo Davim and published by Springer Science & Business Media. This book was released on 2010-01-10 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Surface Integrity in Machining" describes the fundamentals and recent advances in the study of surface integrity in machining processes. "Surface Integrity in Machining" gathers together research from international experts in the field. Topics covered include: the definition of surface integrity and its importance in functional performance; surface topography characterization and evaluation; microstructure modification and the mechanical properties of subsurface layers; residual stresses; surface integrity characterization methods; and surface integrity aspects in machining processes. A useful reference for researchers in tribology and materials, mechanical and materials engineers, and machining professionals, "Surface Integrity in Machining" can be also used as a textbook by advanced undergraduate and postgraduate students.

Heat Treating

Author : Kiyoshi Funatani
Publisher : ASM International
ISBN 13 : 1615032053
Total Pages : 1214 pages
Book Rating : 4.6/5 (15 download)

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Book Synopsis Heat Treating by : Kiyoshi Funatani

Download or read book Heat Treating written by Kiyoshi Funatani and published by ASM International. This book was released on 2000-01-01 with total page 1214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modern Engineering for Design of Liquid-Propellant Rocket Engines

Author : Dieter K. Huzel
Publisher : AIAA
ISBN 13 : 9781600864001
Total Pages : 452 pages
Book Rating : 4.8/5 (64 download)

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Book Synopsis Modern Engineering for Design of Liquid-Propellant Rocket Engines by : Dieter K. Huzel

Download or read book Modern Engineering for Design of Liquid-Propellant Rocket Engines written by Dieter K. Huzel and published by AIAA. This book was released on 1992 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Heat Treating 1998: Proceedings of the 18th Conference: Including the Liu Dai Memorial Symposium

Author : Harry W. Walton
Publisher : ASM International
ISBN 13 : 1615032347
Total Pages : 608 pages
Book Rating : 4.6/5 (15 download)

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Book Synopsis Heat Treating 1998: Proceedings of the 18th Conference: Including the Liu Dai Memorial Symposium by : Harry W. Walton

Download or read book Heat Treating 1998: Proceedings of the 18th Conference: Including the Liu Dai Memorial Symposium written by Harry W. Walton and published by ASM International. This book was released on 1999-01-01 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Shot Peening

Author : Lothar Wagner
Publisher : John Wiley & Sons
ISBN 13 : 3527606947
Total Pages : 584 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Shot Peening by : Lothar Wagner

Download or read book Shot Peening written by Lothar Wagner and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shot peening has been proved to be a powerful instrument in enhancing the resistance of materials to various kinds of stress-induced damage, particularly against damage due to cyclic loading (fatigue) in air or in aggressive environments. As shot peening can be used for a wide variety of structural components irrespective of shape and dimensions, the number of shot peening applications in many industrial branches is increasing. The use of peen forming as a technique to form large metal parts into complicated shapes is also increasing, particularly in the aerospace industry. The Conference covers all aspects of the Science, Technology and Application of Shot Peening, and was intended to attract users, manufacturers as well as scientists working in the field of "Materials Treatment by Shot Peening". Emphasis was put on the current state of knowledge and research. This book offers scientists and engineers an unique opportunity to update their knowledge on shot peening.

Gears

Author : Vincenzo Vullo
Publisher : Springer Nature
ISBN 13 : 3030386325
Total Pages : 691 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis Gears by : Vincenzo Vullo

Download or read book Gears written by Vincenzo Vullo and published by Springer Nature. This book was released on 2020-02-21 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the geometric and kinematic design of the various types of gears most commonly used in practical applications, also considering the problems concerning their cutting processes. The cylindrical spur and helical gears are first considered, determining their main geometric quantities in the light of interference and undercut problems, as well as the related kinematic parameters. Particular attention is paid to the profile shift of these types of gears either generated by rack-type cutter or by pinion-rack cutter. Among other things, profile-shifted toothing allows to obtain teeth shapes capable of greater strength and more balanced specific sliding, as well as to reduce the number of teeth below the minimum one to avoid the operating interference or undercut. These very important aspects of geometric-kinematic design of cylindrical spur and helical gears are then generalized and extended to the other examined types of gears most commonly used in practical applications, such as straight bevel gears; crossed helical gears; worm gears; spiral bevel and hypoid gears. Finally, ordinary gear trains, planetary gear trains and face gear drives are discussed. This is the most advanced reference guide to the state of the art in gear engineering. Topics are addressed from a theoretical standpoint, but in such a way as not to lose sight of the physical phenomena that characterize the various types of gears which are examined. The analytical and numerical solutions are formulated so as to be of interest not only to academics, but also to designers who deal with actual engineering problems concerning the gears