1-20 of 82 Search Results for

Electrical arcs

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001800
EISBN: 978-1-62708-241-9
... examinations determined that the fractures stemmed from electric arc damage. Intergranular quench cracks in the transformed untempered martensite on the surface of the spring provided crack initiations that propagated during operation causing fatigue fracture. torsion springs fracture electrical arcing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091345
EISBN: 978-1-62708-220-4
...Abstract Abstract Beveled weld-joint V-sections were fabricated to connect inlet and outlet sections of tubes in a type 347 stainless steel heat exchanger for a nitric acid concentrator. Each V-section was permanently marked with the tube numbers by a small electric-arc pencil. After one to two...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001385
EISBN: 978-1-62708-215-0
... area, incident 1 Fig. 3 Close-up of electrical panel in incident 1. Arrow indicates where aluminum wires entered the box. Fig. 4 Close-up of one of the melted and arced wires in incident 1 Fig. 1 Schematic showing location of service entrance Fig. 7 Aluminum wire...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001900
EISBN: 978-1-62708-225-9
... Abstract Incorrect grounding of an electric motor resulted in electric current passing through a 52100 steel ball bearing and caused multiple arcing between the rolling elements. The multiple arcing developed a pattern on the outer race known as ‘fluting’. A section of ball race outer showed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046535
EISBN: 978-1-62708-234-1
.... Lengths of pipe were joined by shielded metal arc welding. Soundness of the welded joints was determined by water back-pressure testing after several lengths of pipe had been installed and joined. Before completion of the pipeline, a pressure drop was observed during back-pressure testing. An extreme...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0046238
EISBN: 978-1-62708-231-0
... melting of metal, had occurred. Such local areas of overheating, or burning, are attributable to electric-arc burning. The thermal stresses accompanying the burning caused the circular cracks that nucleated fracture. A section was taken through the cracked areas in an unused pin for metallographic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048143
EISBN: 978-1-62708-235-8
... spring that operated in a pneumatic cylinder was designed for infinite life at a maximum stress level of 620 MPa (90 ksi). Several such springs broke after only 240,000 cycles. No flaws were revealed by visual inspection. Cadmium plating Cylinders Electric arcs Pneumatic devices Spring steel...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001024
EISBN: 978-1-62708-214-3
... that the material forming the pit contained voids and had a microstructure different from the base material. Two hypotheses were possible for the intense, local heating necessary to melt the material forming the pits without affecting the surrounding material—a lightning strike or electrical arcs. The latter...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... Crack and precipitates at primary grain boundaries. Unetched longitudinal section. 100 × Fig. 8 Grain boundary precipitates in polarized light. Longitudinal section. 1200 × The melting of the steel in the basic electric arc furnace with a high content of dissociated nitrogen permitted...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001125
EISBN: 978-1-62708-214-3
... was that, at the moment of rupture, an electric arc was established between the separating steel ends. This would account for the loss of material by meltdown, as well as for the metal droplets on the fracture surface of the steel wire. The sequence of fine pearlite/martensite to degenerate pearlite to original...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... demonstrated similar features, illustrated in Fig. 2 and 3 , including witness marks, discoloration, mechanical deformation, charring, and secondary cracking, along with crack networks. Charring likely occurred as a result of electrical arcing during failure of the transformers. Examination of the bracket...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091394
EISBN: 978-1-62708-227-3
.... The pipe was butt welded by electric arc processes at some joints and butt welded to flanged fittings at other joints. Some air may have been trapped in the top of this and other pipe runs. Fig. 1 Photograph of the inside of a stainless steel pipe with corrosion pits. The pipe was from a fire...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001796
EISBN: 978-1-62708-241-9
... of an electrical current can occur, then a pattern of fluting can develop on the roller and raceway surfaces. Electrical fluting is a phenomenon where the bearing surface is partially melted by sparks (arcing) generated when electric current enters the bearing and passes through an extremely thin oil film...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047621
EISBN: 978-1-62708-229-7
...Abstract Abstract The case and stiffener of an inner-combustion-chamber case assembly failed by completely fracturing circumferentially around the edge of a groove arc weld joining the case and stiffener to the flange. The assembly consisted of a cylindrical stiffener inserted...
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
... and cooling rates. Cutting techniques with insufficient cooling can result in hard spots. Hardened zones can also result from abusive grinding, localized wear, or inadvertent frictional heating of moving components. Unanticipated and unusual events such as resistance heating or electrical arcing of poorly...
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
... Weldments to pipe surface Wrinkle bends Internal combustion Sabotage Longitudinal weld defects High-hardness region (b) (a) Electric flash welding, electric-resistance welding, or electric-induction welding without the addition of extraneous metals. (b) These arc...
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
... to cracking, a magnetic-particle test was done to check for cracks. No cracks were found, but a few weeks later, the weldments were returned, because cracks had initiated at minute arc strikes that were caused by the prods used to make electrical contact for the magnetic-particle test. Due to their small size...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089722
EISBN: 978-1-62708-217-4
...Abstract Abstract A welded elbow assembly (AISI type 321 stainless steel, with components joined with ER347 stainless steel filler metal by gas tungsten arc welding) was part of a hydraulic-pump pressure line for a jet aircraft. The other end of the tube was attached to a flexible metal hose...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
... Electric power generation Steam lines Welded joints ASME SA335-P22 Intergranular fracture Creep fracture/stress rupture A main steam pipe was found to be leaking during a start-up after a 1-day shutdown. The leak was a large circumferential crack in a pipe-to-fitting weld in one of two steam leads...