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tungsten electrode

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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
... contributed 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...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... include: Underbead cracks Gas porosity Inclusions—slag, oxides, or tungsten metal Incomplete fusion Inadequate penetration Solidification cracks, liquation cracks Failure to meet strength, ductility, or toughness requirements is another cause for rejection of weldments. Details...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
.... The size of this focused crossover point is one factor in determining the ultimate spatial resolution of the instrument. Field-emission SEMs have a different system of electron emission. In this case, a sharply pointed tungsten filament is situated near an “extraction” electrode, and the temperature...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
...-shaped electrode. A diagram of a typical spark stand (electrode and specimen geometry), shown in Fig. 1 , illustrates the conventional “point-to-plane” configuration (electrode to specimen). The electrode typically is made of tungsten. The spark stand in modern instrumentation is flushed with argon...
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 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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001837
EISBN: 978-1-62708-241-9
...Abstract Abstract This case study describes the failure analysis of a steel nozzle in which cracking was observed after a circumferential welding process. The nozzle assembly was made from low-carbon CrMoV alloy steel that was subsequently single-pass butt welded using gas tungsten arc welding...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001350
EISBN: 978-1-62708-215-0
... metal and filler wires. The root pass of the fillet weld was made by the tungsten inert gas welding, followed by manual metal arc welding with basic coated electrodes. After each pass, the weldments were inspected visually and by using dye penetrants. After fabrication was completed, the tank passed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091362
EISBN: 978-1-62708-220-4
... rewelded and put back into service. Some rework involved the use of covered electrodes of dissimilar composition. No problems were reported. First, to ensure proper joint cleaning, solvent washing and wiping with a clean lint-free cloth should be performed immediately before welding. The filler wire...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... imaged in the uncoated state using a low-pressure microscope Fig. 18 Nonconductive material imaged using (a) conventional imaging, (b) low-pressure imaging with 20 Pa gas pressure, and (c) using 270 Pa gas pressure Fig. 19 Comparison of (a) conventional tungsten filament SEM to (b...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
....2008.4544331 44. Santana Y.Y. , La Barbera-Sosa J.G. , Bencomo A. , Lesage J. , Chicot D. , Bemporad E. , Puchi-Cabrera E.S. , and Staia M.H. , Influence of Mechanical Properties of Tungsten Carbide-Cobalt Thermal Spray Coatings on Their Solid Particle Erosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001580
EISBN: 978-1-62708-229-7
... is back-filled with helium and welded closed. The Gas Tungsten Arc Welding (GTAW) autogenous process is used to close the canister. The canister is clamped in place and the GTAW electrode is moved around the outside of the canister. Before the continuous weld is started, three tacks approximately 90...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
...; those indicated by a black rectangle were tested in low-velocity or poorly aerated water and at shielded areas may become active and exhibit a potential near −0.5 V. SCE, saturated calomel electrode. Adapted from Ref 2 Although the measurement of potentials has limitations as previously noted...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... electrode half-cell, such as saturated calomel, as described by the procedure in ASTM G 82 ( Ref 3 ). To prepare a valid galvanic series for a given materials and environment of interest, all the factors affecting the potential must be addressed. This includes material composition, heat treatment, surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001561
EISBN: 978-1-62708-229-7
... with ER308 electrode ( Table 1 ). The welding process used was GTAW (Gas Tungsten Arc Welding). The repair area was in its R-2 stage (two repairs completed). The pipe had also been counterbored prior to installation for ease in pipe fit-up prior to welding. The crack on the outside surface of the pipe...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... the pressurized coolant at approximately 15.2 MPa (2200 psi) and the outside environment. The seal welds were made by placing a consumable ring insert of type 308 stainless steel weld metal between the base metals of the cap and tube and fusing the weld region with a gas tungsten arc process. The general...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... of Cobalt, Tantalum, and Tungsten on the Microstructure of Single Crystal Nickel-Base Superalloy , Metall. Trans. A , Vol 16 , 1985 , p 1849 10.1007/BF02670372 114. Collins H.E. , The Effect of Thermal Exposure on the Microstructure and Mechanical Properties of Nickel-Base Superalloys...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1