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friction welding

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047813
EISBN: 978-1-62708-229-7
... lines parallel to the visible crack thought to be fatigue cracks were revealed on examination of the machined surface. The shaft was repaired by welding a new section and machined to required diameters and tapers to avoid abrupt changes. Eccentricity Friction welding 6150 UNS G61500 Fatigue...
Image
Published: 01 June 2019
Fig. 1 6150 steel coal pulverizer shaft that failed by fatigue. (Left) Section through pulverizer showing the inner main shaft that fractured, repaired itself by friction welding, and fractured a second time. (Right) Photograph of the friction welded surface More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047817
EISBN: 978-1-62708-233-4
... to a one-piece forging and circulation of atmosphere during heat treatment was permitted through a hole drilled in the flange end of the rod to avoid decarburization. Friction Welding Holes Roughness Stress concentration 8620 UNS G86200 Fatigue fracture Heat treating-related failures Joining...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001730
EISBN: 978-1-62708-229-7
... (power) Torsional fatigue 6150 UNS G61500 Fatigue fracture A unique failure developed in the central shaft of a coal pulverizer at our plant. A crack appeared in the shaft at one place and then welded by friction around the circumference while the pulverizer continued to operate. Then another...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... electron beam welds electroslag welds fatigue fitness-for-service assessment flash welds friction welding high-frequency induction welds inclusions joint design laser beam welds mechanical testing porosity upset butt welds weld discontinuity weldment failure weldment integrity WELDMENT...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
..., weld defects, or arc strikes. Occasionally, brittle fractures are encountered, particularly in low-temperature environments or as a result of impact or a rapidly applied overload. Brittle fracture may thus be attributable to inappropriate choice of material because of incomplete knowledge...
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
..., and the excessive heat generated by the friction welds the surfaces at the contact points. As the surfaces separate, the metal is torn and transferred between the surfaces. For this reason, scuffing involves various damage mechanisms, such as mechanical, chemical, metallurgical, and thermal reactions ( Ref 26...
Image
Published: 01 June 2019
Fig. 3 The fracture surface of the original crack displays evidence of torsional failure, followed by partial welding by friction. Apparently, the second crack then developed by fatigue. More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
.... Both forms of liquid-impact erosion are discussed in detail in Friction, Lubrication, and Wear Technology , Volume 18 of ASM Handbook ( Ref 1 , 2 ). Most of what is presented in those articles is not repeated here; instead, emphasis in this article is on manifestations of damage and on ways...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001249
EISBN: 978-1-62708-236-5
... the rotating shaft came into direct contact with the flange. Mechanical friction caused a rise in temperature on both contact surfaces. This mutual contact lasted long enough for the temperature in the contact zone to exceed 1200 deg C, at which the flange material became softened or molten. As a result...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
..., gross nonmetallic inclusions, brittle second-phase particles, weld defects, or arc strikes. Occasionally, brittle fractures are encountered, particularly in low-temperature environments or as a result of impact or a rapidly applied overload. Brittle fracture may thus be attributable to inappropriate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001822
EISBN: 978-1-62708-180-1
... Abstract This article provides a background of friction-bearing failures due to overheating. The failures of locomotive axles caused by overheated traction-motor support bearings are discussed. The article also describes liquid-metal embrittlement (LME) in steel. It examines the results...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001749
EISBN: 978-1-62708-215-0
...× Abstract An oxygen line that was part of a mobile, truck -mounted oxygen-acetylene welding unit exploded in service. Analysis revealed that the failure occurred at the flexible hose-to-valve connection. It was further determined that a steel adapter had been installed at the point of failure to make...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... had a type 304 stainless steel shroud around the catalyst bed as protection against the overheating that was possible if the gas bypassed the bed through the refractory material. The failure was observed to have begun at the toe of the shroud-support ring weld. The ring was found to have a number...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001847
EISBN: 978-1-62708-241-9
... on the outer surface of the sleeve, exposing the soft matrix underneath. This led to further wear and an increase in friction between the sleeve and bearing bush. Fatigue crack initiation occurred at the root fillet because of stress concentration and large frictional forces. Insufficient nitriding depth...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... and probably came from the hard surfacing materials used for construction equipment bucket and blade edges. This apparently became friction welded to the gouged surface during the damage process. Failure of mechanically damaged areas can occur from a number of causes and may or may not occur at the time...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
...Common unfilled polymers used for tribological applications run in dry conditions on steel countersurfaces Table 1 Common unfilled polymers used for tribological applications run in dry conditions on steel countersurfaces Material Friction coefficient, μ Wear rate, K (mm 3...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
... composition and grain size. Welding and Hardenability The hardenability variations described herein are also of great concern in the fusion welding of steels. The composition dictates the maximum heat affected zone (HAZ) and weld hardnesses along with a wide variety of heat input and cooling rate...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... to the noncritical components such as ladders and deck railing; ships at the time were built by riveting techniques. However, there was an incentive to use welded construction to speed up construction, reduce tonnage, reduce skin friction by the elimination of plate laps used in riveting, along with the prospect...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... of background data on the manufacturing and fabricating history of a component should begin with obtaining specifications and drawings and should encompass all the design aspects of the failed part as well as all manufacturing and fabrication details—machining, welding, heat treating, coating, quality-control...