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penetration-enhanced gas tungsten arc welding

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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
.... 2.13 . The recommended current types for different metals are summarized in Table 2.1 . Fig. 2.12 Effect of polarity on gas tungsten arc welding weld configuration when using direct current: (a) direct current electrode negative (DCEN), deep penetration, narrow melted area, approximate 30% heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930057
EISBN: 978-1-62708-359-1
... that result from improper gas-tungsten arc welding procedures Backing piece left on: Failure to remove material placed at the root of a weld joint to support molten weld metal Shrinkage voids: Cavity-type discontinuities normally formed by shrinkage during solidification Oxide inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... Macrograph of a multidirectional beta grain morphology in a Ti-6Al-4V gas-tungsten arc weld. 30× Under simple, uniaxial heat flow (such as occurs in a spot weld), the beta grains nucleate epitaxially on beta grains in the base-metal substrates and solidify preferentially in a direction parallel...
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 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... and hard facing; cast-weld construction; and plasma arc cutting and plasma arc welding. The chapter discusses different types of welding processes. These include shielded metal-arc welding, air carbon arc cutting process, gas tungsten-arc welding, gas metal-arc welding process, flux-cored arc welding...
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 austenitic stainless steels as well as several forms of corrosion associated with welding. The effects of gas-tungsten arc weld shielding gas composition and heat-tint oxides on corrosion resistance are then covered. Microbiological corrosion of butt welds in water tanks is also illustrated. In addition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930311
EISBN: 978-1-62708-359-1
... Abstract This article discusses the fusion welding processes that are most widely used for joining titanium, namely, gas-tungsten arc welding, gas-metal arc welding, plasma arc welding, laser-beam welding, and electron-beam welding. It describes several important and interrelated aspects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... techniques: Gas tungsten arc welding (GTAW) Gas metal arc welding (GMAW) Shielded metal arc welding (SMAW) Submerged arc welding (SAW) Plasma arc welding (PAW) Electron beam welding (EBW) Laser beam welding (LBW) Resistance spot welding (RSW) Resistance seam welding (RSEW...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820125
EISBN: 978-1-62708-339-3
... and corrosion resistance, can be achieved by using the inert gas welding processes. The maximum recommended welding current (nonpulsing) for gas tungsten arc welding (GTAW) is approximately 200 A. The maximum recommended welding current (nonpulsing) for gas metal arc welding (GMAW) is approximately 250 A. Both...
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
... to stainless steels, including the more sensitive alloys. These, like all joint designs, aim to ensure full penetration without burn through. Fig. 6 Joint designs. Courtesy Ugine S.A. Gas Tungsten Arc Welding (GTAW)/Tungsten Inert Gas (TIG) Gas tungsten arc welding (GTAW)/tungsten inert gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
.... The instantaneous conversion of the kinetic energy of these electrons into thermal energy as they impact and penetrate into the workpiece causes the weld-seam interface surfaces to melt, producing the desired weld-joint coalescence. The gas tungsten arc welding process uses heat produced by an arc generated between...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... plate. Usually more economical than drilling and tapping. SMAW, shielded metal arc welding; GMAW, gas metal arc welding; FCAW, flux-cored arc welding; GTAW, gas tungsten arc welding; PAW, plasma arc welding; SAW, submerged arc welding; EGW, electrogas welding; ESW, electroslag welding; SW, stud arc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930249
EISBN: 978-1-62708-359-1
... of its availability or for enhanced arc stability, a particular mode of weld metal transfer, enhanced penetration or bead profile, or easier arc ignition. There is no question that quality welds require quality shielding. It is essential that clean gas be maintained and delivered to the point of use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290001
EISBN: 978-1-62708-306-5
..., such as gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW). Fig. 1.6 Welding using shielded metal arc welding process Resistance Welding After the two parts have been pressed together, electric current passes through the joint to heat and melt the interface. Pressure is kept...
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
... carbide (HfC) and may also include additions of rhenium. Tungsten-thoria alloys have traditionally been used for gas tungsten arc welding electrodes but have fallen from favor somewhat due to their radioactive properties. However, arc welding electrodes of tungsten alloyed with ceria (W-2CeO 2 ), zirconia...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... cooling rates) made by, for example, the shielded metal arc, gas tungsten arc, and metal inertgas processes. Note that in comparing the heat input, it is necessary to account for the arc efficiency to compare processes. Depending on the welding conditions, weld metal microstructures generally tend...
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 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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000167
EISBN: 978-1-62708-312-6
... welding methods, such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW), and a number of resistance welding methods, such as flash welding and high-energy impulse welding (HEIW). In the GTAW process, an arc is produced between a nonconsumable tungsten electrode and the base metal. In PM...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310155
EISBN: 978-1-62708-286-0
..., is often deliberately kept at moderate levels (0.008 to 0.015%) for tungsten inert gas (TIG) welding penetration (see Chapter 17 ) and at high levels (0.15%+) for machinability (see Chapter 15 ). These trade-offs, which are beneficial to processors, should be viewed with skepticism by end users, whose...