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Inert gas service

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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 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... after brushing, but the oxide has only been polished. An aggressive abrasive grinding operation is needed to positively remove the oxide. Less-than-ideal inert gas protection can allow the formation of an oxide film on the surface of the deposited weld metal. Care needs to be taken to remove this oxide...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.tb.atia.t59340325
EISBN: 978-1-62708-427-7
... to the welding operation. The product thicknesses of approximately 1.5–3 mm (0.06–0.125 in.) are easily joined by metal inert gas (MIG) welding for much of the basic construction, and tungsten inert gas (TIG) welding can be used, if necessary, for more detailed work. Improvements in welding equipment have made...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030112
EISBN: 978-1-62708-282-2
... on microstructure, hardness, and corrosion potential of welded assemblies of three aluminum alloys. The differences in corrosion potential between the HAZ and the base metal can lead to selective corrosion. (a) Alloy 5456-H321 base metal with alloy 5556 filler; 3-pass metal inert gas weld. (b) Alloy 2219-T87 base...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240583
EISBN: 978-1-62708-251-8
... h causes complete recrystallization of material cold worked over 50%. The annealing process must be performed either in an inert gas or in a high vacuum. Niobium is well suited to deep drawing. The metal may be cupped and drawn to tube, but special care must be taken with lubrication. Sheet metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... consolidation was favored for economic reasons, it became desirable, for quality reasons, to do some degree of forging on all powder nickel-base disks. Current technology favors: Powder production by gas atomization (in vacuum/inert gas) Powder consolidation by HIP or extrusion to form billet...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... welding when the area to be joined is well shielded by an inert gas. By and large, however, atmospheric control by means of a “glove box,” temporary bag, or chamber is preferred. Temperatures Temperatures for all of the customary metallic joining processes can range from low in the alpha-beta range...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
..., and explosion bonding ( Ref 1 ). Electron beam welding is used in critical applications. Tantalum usually is welded by GTAW. Unalloyed tantalum can be welded with inert gas shielding on both sides of the weld using the same techniques that are used to weld titanium and zirconium. Because of potential...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280135
EISBN: 978-1-62708-267-9
... size to be achieved upon subsequent aging. Cooling methods commonly used include oil and water quenching as well as various forms of air or inert gas cooling. Some common cooling methods are indicated in Table 8.2 for wrought alloys and in Table 8.3 for casting alloys. The essence of quenching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
... steels, the avoidance of hydrogen-induced cold cracking is based on the control of hydrogen ( Ref 1 ). The sources of hydrogen (water, oils, greases, waxes, and rust that contains hydrogen or hydrates) should be eliminated. The hydrogen potential also can be minimized by using low-hydrogen, inert-gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080235
EISBN: 978-1-62708-304-1
... the metal is impacted by a particle-laden gas stream. Under conditions involving very high particle velocities, such as 100 m/s (328 ft/s) or higher, at elevated temperatures, oxidizing environments (e.g., air) significantly accelerate the erosion-corrosion rates compared with an inert environment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
... correctly. The actuator bodies have a long lead time, making a viable repair process essential. Traditional repair processes, such as tungsten inert gas welding, metal inert gas welding, and laser cladding, were possible repair options. These methods are able to produce strengths and porosities that would...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930283
EISBN: 978-1-62708-359-1
... and fluorides that must be removed after the joining operation to avoid a possible corrosion problem in service. This has led to a wide acceptance of the inert-gas arc welding processes, which remove the oxide without use of a flux. Hydrogen Solubility Hydrogen dissolves very rapidly in molten aluminum...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440001
EISBN: 978-1-62708-352-2
..., such as drilling holes, machining screw threads, or perhaps chamfering of abutting surfaces, in the case of components to be crimped. The choice of suitable joint configurations is highly dependent on service conditions—for example, whether or not leak tightness is required. Joints may be designed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930311
EISBN: 978-1-62708-359-1
... processes, protection of the weld zone can be provided by localized inert-gas shielding. Complete enclosure in a protective chamber of the high vacuum environment associated with the electron-beam welding process inherently provides better atmospheric protection. In addition to proper shielding, welded...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
... oxygen into its bulk as fast as a surface scale can form, thereby facilitating diffusion bonding. Indeed, at these temperatures, material flow by creep or superplasticity occurs at such low applied stress that gas pressure at just a few MPa (∽1 ksi) can be used to form and weld these materials in any...
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 December 2006
DOI: 10.31399/asm.tb.cw.t51820143
EISBN: 978-1-62708-339-3
... of welded assemblies of three aluminum alloys. The differences in corrosion potential versus saturated calomel electrode (SCE) between the heat-affected zone (HAZ) and the base metal can lead to selective corrosion. (a) Alloy 5456-H321 base metal with alloy 5556 filler; three-pass metal inert gas weld. (b...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040010
EISBN: 978-1-62708-428-4
..., a carrier gas, and simple to highly sophisticated controls. Equipment, materials, processes, and controls may be designed for specific applications. This versatility enables engineers in almost every industry throughout the world to improve the function of their equipment and structures. This article...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
... inert gas (TIG), welding [ Hill et al. 1990 , Merlini and Bush 1978 , Gilliland and Slaughter 1963 , White et al. 1962 ]. (The electron beam welding process is a high-density fusion process that is accomplished by bombarding the joint to be welded with an intense, strongly focused beam of electrons...