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single-pass weldments

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Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005613
EISBN: 978-1-62708-174-0
... in a weldment. It reviews the heat-affected and fusion zones of single-pass and multi-pass weldments. The article also includes a discussion on the welds in alloy systems, such as stainless steels and aluminum-base, nickel-base, and titanium-base alloys. aluminum-base alloys casting fusion zone heat...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003785
EISBN: 978-1-62708-177-1
... in a preferential crystallographic direction ( Ref 2 ). A dendritic structure in a type 304 stainless steel weldment is shown in Fig. 9 . One consequence of epitaxial growth is that a single, favorably oriented grain (packet) can traverse many successive beads in a multiple-pass weld ( Fig. 10 ). As solidification...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001406
EISBN: 978-1-62708-173-3
... is usually better than single-pass weld metal for these reasons: The reheat thermal cycle of each subsequent welding pass normalizes and refines portions of the microstructure in the previous weld metal. Subsequent weld runs temper the previous weld metal and reduce residual stresses from previous...
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
... Abstract This article briefly reviews the general causes of weldment failures, which may arise from rejection after inspection or failure to pass mechanical testing as well as loss of function in service. It focuses on the general discontinuities observed in welds, and shows how some...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001438
EISBN: 978-1-62708-173-3
... solidification. Hot cracking can be minimized by reducing restraint during welding, preheating to slow the cooling rate and reduce the magnitude of welding stresses, and reducing the size of the root opening and increasing the size of the root pass. Certain elements (for example, zinc, cadmium...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003623
EISBN: 978-1-62708-182-5
... within which the proportion melted ranges from 0 to 100%. Lastly, the true HAZ is that portion of the base metal within which microstructural change has occurred in the absence of melting. Although the various regions of a weldment shown in Fig. 1 are for a single-pass weld, similar solidification...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005558
EISBN: 978-1-62708-174-0
... and facilitates alternating weld passes on each side of the joint, which further reduce distortion, at the cost of moving the welder or the part to switch sides. Fig. 15 Comparison of weld metal required for single- and double-V-groove weld joints Joint preparation after assembly has not always been...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001371
EISBN: 978-1-62708-173-3
... in the early 1960s to perform single-pass welding of relatively thin plates in the vertical position. As shown in Fig. 15 , the process is very similar to ESW, with the exception of the presence of an arc and the weld pool shielding mechanism ( Ref 6 ). In most cases, shielding gas is used together...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001034
EISBN: 978-1-62708-161-0
.../no-go None Low cost Source: Ref 1 To understand weldability, it is necessary to recognize the various weld regions. In the case of a single-pass bead, the weldment is generally divided into two main regions: the fusion zone, or weld metal, and the heat-affected zone (HAZ...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001431
EISBN: 978-1-62708-173-3
... and ends. A groove weld joint is machined along the centerline of the plate, and a single-pass weld is produced along this groove. The restraint from the plate and slots produces a weld with various levels of cracking. Fig. 1 Schematic showing slotted plate specifications for Lehigh restraint test...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005591
EISBN: 978-1-62708-174-0
... 1960s to perform single-pass welding of relatively thin plates in the vertical position. As shown in Fig. 21 , the process is very similar to ESW, with the exception of the presence of an arc and the weld pool shielding mechanism ( Ref 6 ). In most cases, shielding gas is used together with a bare...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001341
EISBN: 978-1-62708-173-3
... discrete regions present in a single-pass weld. Source: Ref 17 Fig. 11 Special metallographic procedures show the microstructure of discrete regions (see Fig. 10 ) in an HY-80 weld. (a) Microstructure obtained near a reference mark (indicated by “RM”) using a two-stage nital and sodium...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002493
EISBN: 978-1-62708-194-8
... – 234 26. Das S. , Upadhya G. , Chandra U. , Kleinosky M.J. , and Tims M.L. , Finite Element Modeling of a Single-Pass GMA Weldment , Proc. Engineering Foundation Conference on Modeling of Casting, Welding and Advanced Solidification Processes VI , Piwonka T.S...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001472
EISBN: 978-1-62708-173-3
... and in the root of a weld ( Fig. 3a ), between weld beads in multiple-pass welds ( Fig. 3b ), and at the side of a weld near the root ( Fig. 3c ). Fig. 3 Sections showing locations of slag inclusions in weld metal. (a) Near the surface and in the root of a single-pass weld. (b) Between weld beads...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005622
EISBN: 978-1-62708-174-0
... to as the tungsten inert gas (TIG) process—is used in aerospace, power generation, oil and gas, and other industries for single-pass welds and the root passes of multiple-pass welds in sheet, plate, pipe, tube, fittings, and castings. The advantages of using the GTAW process include high-quality welds, precise...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003622
EISBN: 978-1-62708-182-5
... within which the proportion melted ranges from 0 to 100%. Lastly, the true HAZ is that portion of the base metal within which microstructural change has occurred in the absence of melting. Although the various regions of a weldment shown in Fig. 1 are for a single-pass weld, similar solidification...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002408
EISBN: 978-1-62708-193-1
... of edge preparation exert little influence on welded joint fatigue behavior ( Fig. 7 and 8 ). Single-V welds are usually superior ( Table 5 ); lack of fusion and poor root pass problems often occur in double-V or square joints. The fatigue strength of welded joints is relatively unaffected...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003325
EISBN: 978-1-62708-176-4
... welding without additional loading. Weld metals are qualified by making welds that pass mechanical property tests on the weld metal itself. Such tests can be used to qualify filler materials, such as welding wire or electrodes. Mechanical tests for such qualification are described...
Book Chapter

By K. Sampath
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002488
EISBN: 978-1-62708-194-8
... 8 in.) thick single-pass welds on the outside of the weldment. The workpiece was rotated 180°, and the joint was back gouged and ground to a radius of 6.4 to 9.5 mm ( 1 4 to 3 8 in.). The first increment of welding on the inside of the joint consisted of 3.2 mm ( 1 8...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001410
EISBN: 978-1-62708-173-3
... Abstract Austenitic stainless steels exhibit a single-phase, face-centered cubic structure that is maintained over a wide range of temperatures. This article reviews the compositions of standard and nonstandard austenitic stainless steels. It summarizes the important aspects of solidification...