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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
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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 January 2002
Fig. 19 Comparison of (a) conventional tungsten filament SEM to (b) field emission instrument. Samples imaged at 10,000× 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...
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.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.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.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...