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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270177
EISBN: 978-1-62708-301-0
... Abstract A driven gear in the gear box of an aircraft engine fractured after a 40 h test run. The driving gear and gear shaft were also damaged. Based on the results of fractography, chemical analysis, metallography, and hardness testing, the fracture was caused by a fatigue crack initiating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270148
EISBN: 978-1-62708-301-0
... Abstract This chapter describes an investigation that was conducted to determine why quill shafts were failing prematurely in gear boxes on aircraft engines. The investigation focused on the splines in a splined bore. Visual examination showed that the splines were heavily worn and covered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... Abstract Induction heat treating is used in a wide range of applications. Typical uses, as described in this chapter, include the surface hardening of many types of shafts as well as gears and sprockets and the through-hardening of gripping teeth, cutting edges, and impact zones incorporated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130351
EISBN: 978-1-62708-284-6
... Abstract This chapter presents various case histories that illustrate a variety of failure mechanisms experienced by the high-strength steel components in aerospace applications. The components covered are catapult holdback bar, AISI 420 stainless steel roll pin, main landing gear (MLG) lever...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
... surface hardening, residual stresses after induction surface hardening and finish grinding, and input and output control of steel for induction surface hardening of gears. induction hardening quenching magnetic flux concentrators time-temperature dependence gears steel residual stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440283
EISBN: 978-1-62708-262-4
..., nitriding, and ferritic nitrocarburizing to provide an accurate heat treating process evaluation. This appendix briefly describes the advantages and selection and design considerations of test coupons. A typical example of the use of test pins for monitoring carburizing and hardening of gears is provided...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400145
EISBN: 978-1-62708-316-4
..., velocity, and stroke profiles. It begins by describing the simplest drive configuration, a crankshaft that connects directly to the slide, and a variation of it that uses eccentric gears to alter the stroke profile. It then discusses the effect of adding a fixed link, knuckle joint, or toggle to the slider...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770001
EISBN: 978-1-62708-337-9
...-fatigue strength, contact-fatigue resistance, hardness, and wear resistance. These properties were chosen because it is to promote one or more of these properties that the carburizing treatment is employed. A gear tooth is a good example in which each of these must be considered. Some significance has...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770199
EISBN: 978-1-62708-337-9
... Residual Stress , Grinding Stresses—Cause, Effect and Control , Grinding Wheel Institute , p 27 – 30 8. Drago J.R. , Comparative Load Capacity Evaluation of CBN-Finished Gears , Gear Technol. , May/June 1990 , p 8 – 16 , 48 9. Kumar D.V. , “Technological Fundamentals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... one surface rolls over another. In this situation, the metallurgy of the material beneath the surface (where the maximum shear stresses develop) needs to be considered. When bending conditions prevail, as at a gear tooth fillet, the stresses developed are greatest at the surface and decrease steeply...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770011
EISBN: 978-1-62708-337-9
.... , and Lamberto M. , On the Soft Layer in Carburised Gears , J. Heat Treat. , Vol 3 ( No. 2 ), Dec 1983 10.1007/BF02833083 25. Wegst C.W. , Stahlschlüssel , Verlag Stahlschlüssel Wegst KG , Marbach, Germany , 1977 , p 14 26. Arkhipov I.Y. , Polotskii M.S. , Novikova...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270180
EISBN: 978-1-62708-301-0
... Abstract The nose landing gear on an aircraft malfunctioned during landing roll. After the incident, two fractured studs were found in the retraction jack support beam. Based on visual examination and the results of SEM fractography, investigators concluded that the studs failed by fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140189
EISBN: 978-1-62708-264-8
... Abstract The design requirements for mechanical shafts, pinions, and gears often call for features with very hard surfaces (to resist wear) based on a softer core (to avoid brittle fracture). This chapter explains how to selectively harden steel by diffusing carbon and nitrogen atoms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770171
EISBN: 978-1-62708-337-9
.... , Ed., ASM International Conference , 1989 22. Sveshnikov D.A. , Kudryavstev I.V. , Gulyaeva N.A. , and Golubovskaya L.D. , Chemicothermal Treatment of Gears , Met. Sci. Heat Treat. (USSR) , ( No. 7 ), July 1966 , p 527 – 532 10.1007/BF00673495 23. Motoyama...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... as stress concentrations that can cause fracture of the major part. This is particularly true with respect to gear teeth. In bearings, the pits increase the rolling resistance and can lead to overheating of the bearing and increased loads on other components. Also, the metal removed from the cavities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270102
EISBN: 978-1-62708-301-0
.... dowel bolts fatigue failure fractography low-cycle fatigue test metallography scanning electron microscopy The spur and bevel gears of an aircraft engine were fastened by a set of six dowel bolts. Following a few incidents of dowel bolt failure, the diameter of the bolts...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770077
EISBN: 978-1-62708-337-9
... 1981 20. Shea M.M. , Residual Stress and Microstructure in Quenched and Tempered and Hot Oil Quenched Carburised Gears , J. Heat Treat. , Vol 1 ( No. 4 ), Dec 1980 , p 29 – 36 10.1007/BF02833253 21. Wiegand H. and Tolasch G. , The Combined Effect of Individual...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... a particle of wear debris. Metal also may be transferred from one surface to another by the microwelding process. Arrows indicate direction of sliding. Source: Ref 1 Fig. 12 Severe adhesive wear on a stationary shaft upon which a planetary gear rotated in the presence of an inadequate lubricant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050001
EISBN: 978-1-62708-311-9
... by a discussion of the development of scientific theories involving the electrical nature of induction heating. The author incorporates personal experiences and memories throughout. References 1. Riegel G.C. , Casehardening Large Gears with High Frequency , Met. Prog. , July 1943 , p...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... fatigue strength, good seizure resistance, good dimensional control, excellent quench cracking resistance, low-cast steels usually satisfactory, medium capital investment Carter has reported that failures of carburized gears are primarily due to service-related causes, such as misalignment, poor...