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conduction-mode welding

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Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003206
EISBN: 978-1-62708-199-3
... arc that is established between a consumable electrode (wire) and the workpiece. An externally supplied gas or gas mixture acts to shield the arc and molten weld pool. The GMAW process can be operated in semi-automatic and automatic modes. All commercially important metals, such as carbon steel...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003209
EISBN: 978-1-62708-199-3
... metals and some of the higher-strength metals, including titanium, nickel, and zirconium, and their alloys, which should be welded only in thin gages. A wide variety of shapes and materials can be joined using upset welding in either a single-pulse or continuous mode. Wire, bar, strip, and tubing can...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003021
EISBN: 978-1-62708-200-6
... region Evaluation of the chain orientation, especially parallel to the bond-line region Estimation of the failure modes of mechanically tested weld sections Optimization of welding conditions in order to consistently produce joints of optimum strength Nondestructive evaluation techniques...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003043
EISBN: 978-1-62708-200-6
... not been adequately roughened. Although this photomicrograph is of the surface of the adhesive, not the composite, it clearly shows the imprint of the peel-ply woven surface to which it had not bonded over most of the surface. The comparison between the two modes of failure is dramatic. This failure...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005680
EISBN: 978-1-62708-198-6
... dependent on welding mode (conduction or keyhole), geometry, and use of filler metal ( Ref 10 ). The general rule is to focus at a distance, where maximum penetration depth is attained through experimental verification. Different energy densities can be achieved by the manipulation of lasing hardware...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006477
EISBN: 978-1-62708-190-0
... be displayed in the A-scan mode. Alternately, if there is no flaw in the weld, the incoming ultrasound continues its travel through the weld and reflects back at the opposite side of the material. The back surface reflection signal appears at a later time compared to the aforementioned defect signal...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006473
EISBN: 978-1-62708-190-0
... for each different situation. Distance-amplitude correction may be employed in both longitudinal and shear modes of operation as well as either contact or immersion inspection techniques. Determination of the area-amplitude and distance-amplitude responses of a straight-beam pulse-echo ultrasonic...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009020
EISBN: 978-1-62708-187-0
... feature should be manufactured. This allows casting processes to be applied more creatively, often reducing costs compared to other modes of manufacture, as well as finish machining costs. GD&T encourages the manufacturer to be creative in complying with the dimensional specifications of the drawing...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006441
EISBN: 978-1-62708-190-0
... black line shows the amplitude of the reflection of the axially symmetric wave mode, typically the T(0,1) mode. The large vertical spikes on this line are reflections from butt welds. In fact, these are useful because they aid in the interpretation of the results. The reflection coefficients from these...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... the significance of observations. This article discusses the processes involved in the characterization and identification of damage and damage mechanisms. It describes the relationships between damage causes, mechanisms, and modes with examples. In addition, some of the more prevalent and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003157
EISBN: 978-1-62708-199-3
.... The four failure modes discussed in the section “Failure Modes of Make-Break Contacts” determine the requirements of materials for arcing contacts. In selecting a material, it is often necessary to reach a compromise that provides adequate properties without jeopardizing essential qualities of the...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005343
EISBN: 978-1-62708-187-0
..., or weld-repair artifacts. The fracture mode should correlate with the microstructure of the material as well as the expected stresses on the part. Examination of the fracture surface away from the origin may reveal features that are different from those at the origin, and the crack could be...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... complex geometry such as a welded assembly, or is additively manufactured, or if the part has both metallic and nonmetallic or composite sections. There are terahertz (THz) imaging, infrared (IR) imaging and laser shearography (ST) techniques available that use discontinuity location and damage mode where...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006450
EISBN: 978-1-62708-190-0
... Abstract Eddy-current inspection is based on the principles of electromagnetic induction and is used to identify or differentiate among a wide variety of physical, structural, and metallurgical conditions in electrically conductive ferromagnetic and nonferromagnetic metals and metal parts. This...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003165
EISBN: 978-1-62708-199-3
... low ductility is not improved even when impurities are reduced to levels as low as ∼10 ppm. However, beryllium does show improved ductility at temperatures above 200 to 250 °C (392 to 482 °F), where more crystal deformation modes are available. At 400 °C (750 °F), for example, it shows a tensile...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006454
EISBN: 978-1-62708-190-0
... AE response of a material depends on its microstructure and deformation mode, materials differ widely in their AE response. Brittleness and heterogeneity are two major factors conducive to high emissivity. Ductile deformation mechanisms, such as microvoid coalescence in soft steels, have low...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006438
EISBN: 978-1-62708-190-0
... Electromagnetic radiation from ~10 GHz to 10 THz used in either through-transmission or reflectance mode Airport body scanners, space shuttle foam inspection, in situ NDE of concrete rebar, moisture detection in composite, paint thickness Cannot penetrate conductive metals High-quality imaging can be performed...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003089
EISBN: 978-1-62708-199-3
... ductile fracture. At temperatures lower than about one-half the melting point (absolute scale), this is the familiar dimple-rupture mode, but at higher temperature fracture initiated by grain-boundary sliding or cavitation can occur ( Ref 8 ). Workability problems can also arise when deformation is...
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
... the transition between the base metal and weld metal is shown in Fig. 6(d) . The continuous grain-boundary phase in the weld metal responsible for the decohesive rupture features is evident. It was concluded from the investigation that the bronze gear cracked via mixed-mode overload, rather...
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
...×) in this same area shows the multiple pits and associated corrosion products at the failure origin. The beach marks are seen emanating from the pits, typical of fatigue failure mode. Source: Ref 6 The seal had failed, allowing moisture into the cavity. This served as an electrolyte for...