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tungsten

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Published: 01 January 2002
Fig. 19 Comparison of (a) conventional tungsten filament SEM to (b) field emission instrument. Samples imaged at 10,000× More
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Published: 01 January 2002
Fig. 20 Section through an automatic gas tungsten arc weld containing voids caused by incomplete fusion. (a) Base metal at left is Incoloy 800 nickel alloy, that at right is 2.25Cr-1.0Mo alloy steel. Filler metal was ERNiCr-3, used with cold wire feed. Macrograph. 1×. (b) Micrograph 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 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
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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: 15 January 2021
Fig. 33 (a) Ti-6Al-4V with tungsten inclusion. Kroll’s etch. (b) Energy-dispersive x-ray spectroscopy graph of tungsten inclusion More
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Published: 15 January 2021
Fig. 19 Comparison of (a) conventional tungsten-filament scanning electron microscope to (b) field-emission instrument. Samples imaged at 10,000× More
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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: 15 May 2022
Fig. 10 Gold coating damage in a Pebax catheter tip containing tungsten particles for opacity. (a) Without charging prior to damage. Original magnification: 4300×. (b) With charging after damage due to aging, appearing as light streaks. Original magnification: 5000× More
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Published: 15 May 2022
Fig. 11 SEM/EDX spectrum obtained from a tungsten particle in a Pebax specimen 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
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
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001036
EISBN: 978-1-62708-214-3
... Abstract A 1984 Chevrolet Blazer was being pushed by three youths after it ran out of gas when it was hit from behind by a 1979 Mercury Cougar. One of the youths was crushed between the two vehicles and killed. Optical microscopy was used to examine the tungsten filaments from the headlamps...
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
... Abstract During routine quality control testing, small circuit breakers exhibited high contact resistance and, in some cases, insulation of the contacts by a surface film. The contacts were made of silver-refractory (tungsten or molybdenum) alloys. Infrared analysis revealed the film...