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electrodes

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Published: 15 May 2022
Fig. 7 Taper-pin electrodes for measuring the insulation resistance of (a) plate, (b) tube, and (c) rod specimens; min, minimum. Reprinted, with permission, from Ref 9 More
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Published: 01 June 2019
Fig. 2 Melter electrode assembly: (a) 690 sheath, (b) molybdenum electrode More
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Published: 01 January 2002
Fig. 43 Dealuminification of a cast aluminum bronze furnace electrode pressure ring exposed to recirculating cooling water (pH = 7.8 to 8.3, conductivity = 1000 to 1100 μS). The preferentially attacked γ phase left behind a residue of copper (darkened regions in eutectoid and along grain More
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Published: 01 June 2019
Fig. 4 Typical examples of fissures; (a) and (c) bare wire, (b) covered, electrodes × 1 1 4 More
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Published: 01 June 2019
Fig. 3 Section of the transverse weld. Electrode slags. Etch: oxalic acid 10%. 10 × More
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Published: 01 June 2019
Fig. 1 Schematic showing the melter and electrode before and after the failure More
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Published: 01 June 2019
Fig. 5 (a) Cross section of electrode assembly just behind melted end of sheath. A thin glass layer is shown between the molybdenum electrode and the 690 sheath (see arrow). (b) SEM of glass layer. Alloying between the molybdenum and nickel was not present in this region. More
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Published: 01 June 2019
Fig. 6 Specimen sectioned from melted end on 690 electrode sheath. (a) Light area around outer edge shows melted 690. Molybdenum was not found in this region. (b) Extremely large grains in excess of 0.13 cm were common in this region. More
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Published: 01 June 2019
Fig. 7 SEM of the molybdenum electrode. EDX spectra indicated the presence of antimony on the surface of the electrode (see arrows). Nickel from the Inconel sheath was also present. More
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Published: 01 June 2019
Fig. 8 SEM of the molybdenum electrode. EDX spectra indicated the presence of antimony on the grain boundaries (see arrow). Nickel from the Inconel sheath was also present. More
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Published: 15 January 2021
Fig. 43 Dealuminification of a cast aluminum bronze furnace electrode pressure ring exposed to recirculating cooling water (pH = 7.8 to 8.3, conductivity = 1000 to 1100 μS). The preferentially attacked γ phase left behind a residue of copper (darkened regions in eutectoid and along grain More
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Published: 15 May 2022
Fig. 3 Guarded three-terminal parallel-plate electrode system showing flux lines between electrodes. Reprinted, with permission, from Ref 5 More
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Published: 15 May 2022
Fig. 5 Micrometer electrode system. Adapted from Ref 1 , 2 More
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Published: 15 May 2022
Fig. 8 Guarded three-terminal electrode system for measuring volume and surface resistance or conductance of flat specimens. g ≤ 2 t volume resistivity, g ≥ 2 t surface resistivity. Reprinted, with permission, from Ref 9 More
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Published: 15 May 2022
Fig. 9 Guarded three-terminal electrode assembly for measuring volume and surface resistance or conductance of tubular specimens. D 0 = ( D 1 + D 2 )/2; L > 4 t ; g ≤ 2 t volume resistivity, g ≥ 2 t surface resistivity. Reprinted, with permission, from Ref 9 More
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
... Abstract Failure of a pilot scale test melter resulted from severe overheating of an Inconel 690 (690) jacketed molybdenum electrode. Extreme temperatures were required to melt the glass during this campaign because the feed material contained a very high waste loading. Metallurgical evaluation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048751
EISBN: 978-1-62708-235-8
... to the weld seam, were revealed by metallographic examination (hot shortness). It was indicated by energy-dispersive spectroscopy that type 316 electrode was not used for the root pass and instead a nickel-copper alloy electrode was employed. It was thus concluded that cracking was caused due to the use...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047673
EISBN: 978-1-62708-217-4
... Abstract A series of resistance spot welds joining Z-shape and C-shape members of an aircraft drop-tank structure failed during ejection testing. The members were fabricated of alclad aluminum alloy 2024-T62. The back surface of the C-shape members showed severe electrode-indentation marks off...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0047537
EISBN: 978-1-62708-228-0
... standard vertical down stove pipe-welding procedures with E7010 cellulosic electrodes. The crack started partially as a result of incomplete fusion on the pipe side wall, which in turn was a result of misalignment of the two pipes. The crack was typical of hydrogen cracking. Girth welds can be made using...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001744
EISBN: 978-1-62708-217-4
... formed during the fabrication of the axle mounting plate. So-called all-purpose electrodes were used. Thus, the main cause for failure was a manufacturing deficiency-fatigue failure developed because of improper welding during fabrication of the axle. The proper electrode should have been used...