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remelting

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Image
Published: 01 December 1992
Fig. 20 Autogenous TIG remelting used to remove weld toe intrusions. Source: Ref 3 . More
Image
Published: 01 December 2019
Fig. 6 SEM image of a remelted, arc-damage area at one fracture origin (arrow) More
Image
Published: 01 December 2019
Fig. 7 Detail of one remelt area at a fatigue origin More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047835
EISBN: 978-1-62708-217-4
... of the piston-pin-bushing bore. The fracture was nucleated at an electroetched numeral 5 on one of the flange surfaces. A notch, caused by arc erosion during electroetching, was revealed by metallographic examination of a polished-and-etched section through the fracture origin. A remelted zone and a layer...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001505
EISBN: 978-1-62708-217-4
... with the annular zone of remelted material on the inner surface of the disc. In the lower disc, the fracture was also 80% fatigue, but high stress, low cycle in nature and contained multiple initiation sites coincident with an electron beam weld bead. It was concluded that fatigue in the upper disc resulted from...
Image
Published: 01 January 2002
Fig. 38 (a) Pitting on this mold cavity (arrow) was observed after polishing of the AISI S7 plastic mold and was caused by the use of improper post-EDM procedures. (b) The classic appearance of such failures. There is a large, remelted surface layer above a reaustenitized, untempered zone More
Image
Published: 15 January 2021
Fig. 47 (a) Pitting on this mold cavity (arrow) was observed after polishing of the AISI S7 plastic mold and was caused by the use of improper post-electrical discharge machining procedures. (b) The classic appearance of such failures. There is a large, remelted surface layer above More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... in a region depleted of chromium and nickel. This condition coincides with a microstructural inhomogeneity consisting of large, soft ferrite grains. Its origin was probably contamination of the solidifying ingot during the consumable vacuum arc remelting operation. Bevel gears Forgings Gear teeth...
Image
Published: 01 January 2002
Fig. 19 Fracture surface of an articulated rod made from a 4337 steel forging. (a) Fracture origin (arrow B) at an electroetched numeral, and beach marks (arrows A and C). (b) Micrograph through fracture origin showing remelted zone (arrow D), notch produced by electroetching (arrow E More
Image
Published: 01 June 2019
Fig. 1 Fracture surface of an articulated rod made from a 4337 steel forging. (a) Fracture origin (arrow B) at an electroetched numeral, and beach marks (arrows A and C). (b) Micrograph through fracture origin showing remelted zone (arrow D), notch produced by electroetching (arrow E More
Image
Published: 30 August 2021
Fig. 30 Fracture surface of an articulated rod made from a grade 4337 steel forging. (a) Fracture origin (arrow B) at an electroetched numeral, and beach marks (arrows A and C). (b) Micrograph through fracture origin showing remelted zone (arrow D), notch produced by electroetching (arrow E More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048400
EISBN: 978-1-62708-226-6
... not to be in compliance with standards (type 304 stainless steel without molybdenum). The screws and washers were found to be made of remelted implant-quality type 316L stainless steel and were intact. Signs of sensitization, characterized by chromium carbide precipitates at the grain boundaries, were revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001206
EISBN: 978-1-62708-235-8
... seam. The cracks only appeared where the originally deposited bead was remelted in the regions of overlap. Given the construction and welding technique used, it would have been preferable to make the nipples of a steel lower in sulfur content. However, by taking advantage of all the potential...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046044
EISBN: 978-1-62708-235-8
... Abstract A rocket-motor case made of consumable-electrode vacuum arc remelted D-6ac alloy steel failed during hydrostatic proof-pressure testing. Close visual examination, magnetic-particle inspection, and hardness tests showed cracks that appeared to have occurred after austenitizing...
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
.... Visual examination revealed beach marks typical of fatigue cracks that had nucleated at the base of the longitudinal oil hole. Micrographs of sections revealed a remelt zone and an area of untempered martensite within the region of the cracks. However, review of inspection procedures disclosed the pins...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001752
EISBN: 978-1-62708-241-9
... Abstract Results of failure analyses of two aircraft crankshafts are described. These crankshafts were forged from AMS 6414 (similar composition to AISI 4340) vacuum arc remelted steels with sulfur contents of 0.003% (low sulfur) and 0.0005% (ultra-low sulfur). A grain boundary sulfide...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001293
EISBN: 978-1-62708-215-0
... Abstract A forged, cadmium-plated electroslag remelt (ESR) 4340 steel mixer pivot support of the rotor support assembly located on an Army attack helicopter was found to be broken in two pieces during an inspection. Visual inspection of the failed part revealed significant wear on surfaces...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001296
EISBN: 978-1-62708-215-0
... that the part failed by low cycle fatigue. The fracture was brittle in nature and had originated at a severely eroded zone of craters in a hard, deep white layer that was the result of remelting during electrodischarge machining. It was recommended that the remaining parts be inspected using a stereoscopic...
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
... of the wire surfaces at the OD of the springs did show areas of remelted material at the fatigue zone origins ( Figs. 6 , 7 ). Stray current electrical discharge damage can occur due to the component constituting a transmission pathway to ground for welding currents, improperly grounded machinery electrical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048405
EISBN: 978-1-62708-226-6
... secondary crack is shown at thread site (arrow). 55├Ś. (c) Fatigue striations on fracture surface Corresponding to the energy-dispersive x-ray analyses, the screws ( Fig. 1a ) were manufactured from cold-worked remelted (R) type 316L stainless steel and showed no structural or manufacturing defects...