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inert gas fusion methods

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720139
EISBN: 978-1-62708-305-8
... Abstract The overall chemical composition of metals and alloys is most commonly determined by x-ray fluorescence (XRF) and optical emission spectroscopy (OES). High-temperature combustion and inert gas fusion methods are typically used to analyze dissolved gases (oxygen, nitrogen, and hydrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... be taken to shield the weld and hot root side of the joint from air. EBW involves an evacuated chamber to permit electrons to be generated and delivered to the workpiece or it involves inert gas shielding of the workpiece in nonvacuum EBW. Arc welding fusion processes such as GTAW may involve a chamber...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... the welding processes that are adaptable to titanium and its alloys. Acceptable processes include gas tungsten arc, plasma arc, gas metal arc, electron beam, friction stir, and resistance spot and seam welding methods where, depending on the method, inert gas, vacuum, and/or metal contact provide the required...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
.... Welding Processes Niobium alloys, can be easily welded by the GTAW, electron-beam and laser-beam welding (LBW) processes, either autogenously or with matching filler metals in inert atmospheres. Gas tungsten arc welding is the most commonly used method of welding niobium and its alloys. Unalloyed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
.... Although not fully understood, another method to reduce PWHT cracking is the use of vacuum or inert atmospheres in PWHT. Fig. 9.6 Minipatch welding tests on U-700 nickel-base superalloy showing the benefit of overaging on postweld heat treatment cracking, (left) solution heat treated, (right...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930057
EISBN: 978-1-62708-359-1
.... 2 Wormhole porosity in a weld bead. Longitudinal cut. 20x Radiography is the most widely used nondestructive method for detecting subsurface gas porosity in weldments. The radiographic image of round porosity appears as round or oval spots with smooth edges, and elongated porosity appears...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
... to which the assembled component will be exposed in service. Four joining methods are examined: fusion welding, brazing, solid-state bonding, and soldering. 23.1 Fusion Welding 23.1.1 Introduction Beryllium has been successfully welded by several processes, including gas tungsten arc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290001
EISBN: 978-1-62708-306-5
... gas. Flux-cored wire allows a continuous and mechanized operation. The flux is supplied as a powder in submerged arc welding for horizontal welds, and a resistive slag pool protects the weld zone in electroslag welding of thick plates. Inert gas provides the protection in some welding processes...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
...% of all industrial welding is done by arc welding. Specific arc welding methods include: Shielded metal arc welding (SMAW) Flux cored arc welding (FCAW) Submerged arc welding Gas metal arc welding (GMAW), which is also commonly referred to as MIG (metal inert gas) welding Gas tungsten...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... shear strengths produced in thermoplastic composites, using the various techniques described above, is given in Fig. 6.18 . Note that adhesive bonding yields lower joint strengths than fusion bonding techniques and is very dependent on the surface preparation method used. Autoclave coconsolidated (melt...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
... be measured by magnetic devices and estimated from the Schaeffler diagram, a useful empirical mapping of weld metal phase composition shown in Fig. 1 . This diagram has an arbitrary cooling rate resembling that of tungsten inert gas (TIG; described in a separate section of this chapter) welds. Faster...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
... Abstract This chapter describes the processes involved in the fabrication of wrought and cast metal products. It discusses deformation processes including bending and forming, material removal processes such as milling, cutting, and grinding, and joining methods including welding, soldering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060085
EISBN: 978-1-62708-261-7
... the design and operation of melting furnaces as well as melting practices and the role of fluxing. It also discusses casting methods, nonferrous casting alloys, and atomization processes used to make metal powders. atomization foundry casting melting furnaces nonferrous casting alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930197
EISBN: 978-1-62708-359-1
... features that are causes for rejection include: Underbead cracks Gas porosity Inclusions—slag, oxides, or tungsten metal Incomplete fusion Inadequate penetration Failure to meet strength requirements is another cause for rejection of weldments. Details of test methods for welds...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230071
EISBN: 978-1-62708-298-3
.... This energy cost imposes the economic limit of the method to the use of high-grade beryl ore containing more than 10 wt% BeO. Dust evolution during fusion is limited through the use of pieces of beryl larger than 2 cm. A carbonate content limit is specified to help control dust from gaseous carbon dioxide...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... by x-ray fluorescence (XRF) and optical emission spectroscopy (OES). While these methods work well for most elements, they are not useful for dissolved gases and some nonmetallic elements that can be present in metals as alloying or impurity elements. High temperature combustion and inert gas fusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700215
EISBN: 978-1-62708-279-2
... processes. Material strength or thickness had no effect on laser welded joint strength. Welding processes using fillers demonstrated better results than those without fillers. Laser welded lap joints generally failed in the weld metal, while metal inert gas (MIG) fillet joints generally failed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930085
EISBN: 978-1-62708-359-1
... if they are not oriented almost parallel with the radiation beam. Radiography is not effective at detecting incomplete sidewall fusion in metal-inert gas welds with a 30° chamfer angle, for example, unless the radiographic source is aligned with the angle, which requires multiple exposures. In eddy-current testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... in 10% FeCl 3 . Resistance to pitting, as measured by the critical pitting temperature, increases with molybdenum content and decreases after autogenous tungsten inert gas welding. Source: Ref 5 Amounts of principal alloying elements in stainless steels tested for pitting resistance Table 1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
...). The corrosion probe tests were conducted in the first pass of the front wall in a boiler at Hempstead plant for 76 days of exposure with the metal temperature maintained between 180 and 230 °C (350 and 450 °F). Coatings were applied by the inert gas electric arc spraying method. Disbonding of the coating during...