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contact resistivity distribution

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001531
EISBN: 978-1-62708-231-0
... grain size and pearlite colony size almost have the same effective grain size and resistance of fatigue crack growth. However, coarsing austenite grain makes large inclusions, which unevenly distribute on the grain boundaries and reduce the join strength of the boundary. The examination of inclusions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091358
EISBN: 978-1-62708-233-4
.... Micrograph shows localized corrosion along manganese sulfide stringer inclusions at the end-grain surface. 100× Type 303 stainless steel has only marginal corrosion resistance for this application, because of the size and distribution of sulfide stringers found in some lots of standard grades...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
.... , Scuffing Mechanism of Near-Surface Material during Lubricated Severe Sliding Contact , Wear , Vol 271 , 2011 , p 1750 – 1753 10.1016/j.wear.2010.12.086 37. Olander P. and Jacobson S. , Scuffing Resistance Testing of Piston Ring Materials for Marine Two-Stroke Diesel Engines...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
...-Ring Test Rig , J. Tribol. , Vol 119 ( No. 3 ), 1997 , p 365 – 370 10.1115/1.2833494 35. Bohmer H.-J. , Hirsch T. , and Streit E. , Rolling Contact Fatigue Behaviour of Heat Resistant Bearing Steels at High Operational Temperatures , Mater.wiss. Werkst.tech. , Vol 30...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091538
EISBN: 978-1-62708-233-4
... made to improve the resistance of the contact-finger retainers to SCC. The slots were redesigned to have inside corner radii of 3.2 mm (0.125 in.) to reduce the stress concentration associated with the square corners in the original design, and the formed retainers were shot blasted to remove uneven...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... pressure sintering have the best impact resistance. For ball sizes of 6.35 mm (0.25 in.), the maximum contact pressure of 20 to 25 GPa (2.9 to 3.6 × 10 6 psi) was required to form surface ring cracks; for ball sizes of 12.7 mm (0.50 in.), 10 to 15 GPa (1.5 to 2.2 × 10 6 psi) was required; for ball sizes...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
...-element bearings are designed on the principle of rolling contact rather than sliding contact; frictional effects, although low, are not negligible, and lubrication is essential. The article lists the typical characteristics and causes of several types of failures. It describes failure by wear, failure...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
...-life criterion gas porosity heat treatment inclusions infinite-life criterion internal bursts macropitting micropitting reversed bending rolling-contact fatigue rotational bending strengthening stress distribution subcase fatigue thermal fatigue torsional loading FATIGUE damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001645
EISBN: 978-1-62708-232-7
... resistance, toughness, temper resistance, and microstructural stability under anticipated and actual service conditions. 2 Notwithstanding the aforesaid requirements, the most important property for bearings is the resistance to rolling-contact fatigue. Rolling-contact fatigue results from the repeated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
... contact-fatigue strength ( Ref 9 ) is an important roll property that influences its spalling propensity, a uniform carbide distribution is all the more desirable. This is because finely dispersed carbides, by virtue of their better cohesion with the matrix, not only enhance wear resistance, but also...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001189
EISBN: 978-1-62708-218-1
... or case hardening would have been better under these circumstances. Fuel injection pumps Gears Pitting (wear) C45 Rolling-contact wear Two fuel injection pump gears that were nitrided in a cyanide bath were submitted by the engine manufacturer for examination of hardness distribution...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001680
EISBN: 978-1-62708-221-1
...-rotating Rope. The middle strands and outside strands are laid in opposite directions to produce the rotation resistant properties. Wire ropes are so constructed that the failure of an individual wire does not affect the load bearing capacity of the rope. The number, distribution, and type of wire...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... the characteristics of fatigue fractures followed by a discussion on the effects of loading and stress distribution, and material condition on the microstructure of the material. In addition, general prevention and characteristics of corrosion fatigue, contact fatigue, and thermal fatigue are also presented...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... overloading. This was confirmed by finite element analysis, which also revealed compressive contact stresses between the wires and between the rope and sheave surface. Based on the results, it was concluded that a tensile overload, due to the combined effect of a sudden load and undersized sheave, is what...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... straight spur-gear teeth of the same width. Consequently, the load on these gears is distributed not only over more than one tooth but also over a greater total length of line of contact. On the other hand, the increased angularity of the teeth increases the axial thrust load and thus increases the loading...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... Fig. 13 Clock-face designation of the peripheral sites on the striking face Fig. 14 Spatial distribution of the spall flight paths Fig. 26 “Simple” spall cavity, 18×. A, cavity surface roughly perpendicular to the striking surface of the hammer; B, cavity surface almost parallel...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
.... Galvanic corrosion occurs when two dissimilar conducting materials (metallic or nonmetallic) are in electrical contact. It usually consists of two dissimilar conductors in electrical contact with each other and with a common conducting fluid (an electrolyte), or it may occur when two similar conductors...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... intersected. The ratchet mark at the middle arrow was damaged by postfracture contact. Fig. 3 Schematic of gradients in fatigue initiation driving force (shown as total stress) and fatigue resistance (fatigue strength) that can result in subsurface initiation in a case-hardened component. Total...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001610
EISBN: 978-1-62708-222-8
... for surgical implant materials. Additionally, none of the stainless steel piercings passed the pitting-resistance criterion of ISO 5832-1, which implies that [%Cr + 3.3(%Mo)] > 26. Under microscopic examination, most of the jewelry revealed the intense presence of linear irregularities on the surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... of corrosion. Uniform attack, pitting, and crevice corrosion can all be exacerbated by galvanic conditions. Galvanic corrosion occurs when two dissimilar conducting materials (metallic or nonmetallic) are in electrical contact with an electrolyte or conducting medium. It usually consists of two dissimilar...