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tungsten

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Published: 01 June 2019
Fig. 11 EDS spectrum of tungsten-rich region in alloy carbide segregate More
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Published: 01 June 2019
Fig. 3 Molybdenum/tungsten drain valve assembly. Arrow indicates fracture surface exposed during disassembly. More
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Published: 01 June 2019
Fig. 2 Full-penetration autogenous gas tungsten arc weld (GTAW) joint More
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Published: 01 December 2019
Fig. 6 Different zones produced in transverse face after single pass gas tungsten arc welding along with relative sizes of zones More
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Published: 01 December 1992
Fig. 2 Tungsten filaments of the headlamp shown in Fig. 1 . More
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Published: 01 December 1992
Fig. 4 Closeup view of the tungsten filaments of the halide bulb shown in Fig. 3 . More
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Published: 01 December 1992
Fig. 6 Tungsten filaments of the lamp shown in Fig. 5 . More
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Published: 01 December 1992
Fig. 8 Tungsten filaments of the lamp shown in Fig. 7 . More
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Published: 01 December 1992
Fig. 9 Closeup view of the severed smaller tungsten filament in Fig. 7 . More
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Published: 01 December 1992
Fig. 11 Closeup view of tungsten filament fragments shown at bottom of glass envelope in Fig. 10 . More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001036
EISBN: 978-1-62708-214-3
... Fig. 1 Damaged left headlamp of the Mercury Cougar. Fig. 2 Tungsten filaments of the headlamp shown in Fig. 1 . Fig. 3 Inner halide bulb component from the right headlamp of the Cougar. Fig. 4 Closeup view of the tungsten filaments of the halide bulb shown...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047598
EISBN: 978-1-62708-217-4
... Abstract Two aircraft-engine tailpipes of 19-9 DL stainless steel (AISI type 651) developed cracks along longitudinal gas tungsten arc butt welds after being in service for more than 1000 h. Binocular-microscope examination of the cracks in both tailpipes revealed granular, brittle-appearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047602
EISBN: 978-1-62708-235-8
... Abstract Parts of 21Cr-6Ni-9Mn stainless steel that had been forged at about 815 deg C (1500 deg F) were gas tungsten arc welded. During postweld inspection, cracks were found in the HAZs of the welds. Welding had been done using a copper fixture that contacted the steel in the area of the HAZ...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001389
EISBN: 978-1-62708-215-0
... Fig. 1 Typical microstructure of a 50Ag–50Mo contact. The light areas are silver, the dark areas molybdenum. 380× Fig. 2 Typical microstructure of a 27Ag–73W contact. The light areas are silver, the dark areas tungsten. 380× Fig. 3 Schematic showing the silver-refractory...
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 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, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047590
EISBN: 978-1-62708-217-4
... Abstract A weld in a fuel-line tube broke after 159 h of engine testing. The 6.4-mm (0.25-in.) OD x 0.7-mm (0.028-in.) wall thickness tube and the end adapters were all of type 347 stainless steel. The butt joints between tube and end adapters were made by automated gas tungsten arc (orbital...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001599
EISBN: 978-1-62708-236-5
... to the failure of the electrode. The source of the antimony was not identified but is believed to have originated from the feed material. Metallurgical evaluation also revealed that nickel had attacked the grain boundaries of the molybdenum/tungsten drain valve. This component did not fail in service; however...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
..., is presented. As an example, the materials and metallographic techniques employed in an actual on-site investigation of a gas tungsten-arc weldment joining two large diameter Ti-6Al-4V alloy cylinders are discussed in depth to illustrate what can be accomplished. Cylinders Field Metallography Welded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047641
EISBN: 978-1-62708-235-8
... Abstract A Ti-6Al-4V alloy pressure vessel failed during a proof-pressure test, fracturing along the center girth weld. The girth joints were welded with the automatic gas tungsten arc process utilizing an auxiliary trailing shield attached to the welding torch to provide inert-gas shielding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0091048
EISBN: 978-1-62708-235-8
... Abstract A welded ferritic stainless steel heat exchanger cracked prior to service. The welding filler metal was identified as an austenitic stainless steel and the joining method as gas tungsten arc welding. Investigation (visual inspection, SEM images, 5.9x images, and 8.9x/119x images etched...