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laser beam welding
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Image
Published: 01 November 2011
Image
Published: 01 July 1997
Fig. 1 Macrograph showing columnar beta grains in a Ti-6Al-4V laser-beam weld. 13×. Courtesy of The Welding Institute
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Image
Published: 01 July 1997
Fig. 8 S/N curves for laser-beam welds in 4 mm (0.16 in.) Ti-6Al-4V sheet produced at 2 and 4 m/min (0.6 and 1.2 ft/min). Tested in as-welded condition. Fracture initiated at weld undercut. Base metal properties are provided for comparative purposes. Source: Ref 42
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Image
Published: 01 December 2000
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... Abstract This chapter discusses the fusion welding processes, namely oxyfuel gas welding, oxyacetylene braze welding, stud welding (stud arc welding and capacitor discharge stud welding), high-frequency welding, electron beam welding, laser beam welding, hybrid laser arc welding, and thermit...
Abstract
This chapter discusses the fusion welding processes, namely oxyfuel gas welding, oxyacetylene braze welding, stud welding (stud arc welding and capacitor discharge stud welding), high-frequency welding, electron beam welding, laser beam welding, hybrid laser arc welding, and thermit welding.
Book Chapter
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...
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 of welding phenomena that contribute to the overall understanding of titanium alloy welding metallurgy. These factors include alloy types, weldability, melting and solidification effects on weld microstructure, postweld heat treatment effects, structure/mechanical property/fracture relationships, and welding process application.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930197
EISBN: 978-1-62708-359-1
... of service failures. The discussion covers various factors that may lead to the failure of arc welds, electroslag welds, electrogas welds, resistance welds, flash welds, upset butt welds, friction welds, electron beam welds, and laser beam welds. corrosion deformation fracture inspection mechanical...
Abstract
Weldment failures may be divided into two classes: those identified during inspection and mechanical testing and those discovered in service. Failures in service arise from fracture, wear, corrosion, or deformation. In this article, major attention is directed toward the analysis of service failures. The discussion covers various factors that may lead to the failure of arc welds, electroslag welds, electrogas welds, resistance welds, flash welds, upset butt welds, friction welds, electron beam welds, and laser beam welds.
Image
Published: 01 December 2000
Fig. 12.32 Effect of welding processes on fatigue crack growth rate of longitudinally oriented titanium alloys. (a) Ti-6Al-4V alpha-beta alloy. (b) Ti-15V-3Cr-3Al-3Sn beta alloy. GTAW, gas-tungsten arc welding; EBW, electron beam welding; LBW, laser beam welding
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Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... weld of alpha-beta alloy Ti-6Al-4V. (a) 10×. (b) 240× Fig. 9.2 Macrograph showing columnar beta grains in a Ti-6Al-4V laser beam weld. 13× Fig. 9.3 Macrograph showing coarse prior-beta grain size in weld metal of an electron beam-welded Ti-6Al-4V forging Fig. 9.4...
Abstract
This chapter covers the welding characteristics of titanium along with the factors that determine which welding method is most appropriate for a given application. It discusses the joinability of titanium alloys, the effect of heat on microstructure, the cause of various defects, and the need for contaminant-free surfaces and atmospheres. It describes common forms of fusion, arc, and solid-state welding along with the use of filler metals, shielding gases, and stress-relief treatments. It also discusses the practice of titanium brazing and the role of filler metals.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930365
EISBN: 978-1-62708-359-1
... (a) Widely welded but welds have low strength and care must be taken to avoid cracks Series 7000, Al-Zn-Mg Resistance, MIG, TIG Thick sections As welded or reheated (a) Can be welded, structures with high mechanical strength through age-hardening Series 8000, Al-Li MIG, TIG, laser, electron beam...
Abstract
This appendix provides reference tables listing weldability of cast irons, steels, and nonferrous metals. A process selection table for arc welding carbon steels is included, and recommended preheat and interpass temperature tables are also presented. This appendix includes information on qualification codes and standards.
Image
Published: 01 August 1999
Fig. 11.28 (Part 4) (h) Progression of the weld pool during butt welding with a high-energy beam. Applies specifically to welding with a laser beam, but applies equally to electron-beam welding.
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.9781627083591
EISBN: 978-1-62708-359-1
Image
Published: 01 July 1997
Fig. 6 Fatigue crack growth in laser beam weldments of Ti-6Al-4V both without and with a postweld stress relief treatment of 4.5 h at 625 °C (1160 °F). (a) Fatigue crack growth parallel to weld. (b) Fatigue crack growth perpendicular to weld. These data suggest that residual stresses
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Book Chapter
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 August 2018
DOI: 10.31399/asm.tb.msisep.t59220085
EISBN: 978-1-62708-259-4
... to be removed is selected and an ion beam–assisted platinum deposition is done on location (a). A trench is dug on each side of the region to be sampled by sputtering using a high-energy ion beam (b–e). Images (d) and (e) are top views. The sample is separated from one edge using the ion beam, welded...
Abstract
This chapter discusses the use of electron microscopy in metallographic analysis. It explains how electrons interact with metals and how these interactions can be harnessed to produce two- and three-dimensional images of metal surfaces and generate crystallographic and compositional data as well. It discusses the basic design and operating principles of scanning electron microscopes, transmission electron microscopes, and scanning transmission electron microscopes and how they are typically used. It describes the additional information contained in backscattered electrons and emitted x-rays and the methods used to access it, namely wavelength and energy dispersive spectroscopy and electron backscattering diffraction techniques. It also describes the role of focused ion beam milling in sample preparation and provides information on atom probes, atomic force microscopes, and laser scanning microscopes.
Book Chapter
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...
Abstract
Superalloys, except those with high aluminum and titanium contents, are welded with little difficulty. They can also be successfully brazed. This chapter describes the welding and brazing processes most often used and the factors that must be considered when making application decisions. It discusses the basic concepts of fusion welding and the differences between solid-solution-hardened and precipitation-hardened wrought superalloys. It addresses joint integrity, design, weld-related cracking, and the effect of grain size, precipitates, and contaminants. It covers common fusion welding techniques, defect prevention, fixturing, heat treatments, and general practices, including the use of filler metals. It also discusses several solid-state welding methods, superplastic forming, and transient liquid phase bonding, a type of diffusion welding process. The chapter includes extensive information on brazing processes, atmospheres, filler metals, and surface preparation procedures. It also includes examples of nickel-base welded components for aerospace use.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410551
EISBN: 978-1-62708-265-5
... Surface Modification Laser and electron beams provide very high energy, directed sources of heat, and are used for many surface-modification techniques. Depending on power input, high-energy beams may be used for cutting and welding, surface melting and alloying, and localized surface heat treatment...
Abstract
This chapter describes surface modification processes that go beyond conventional heat treatments, including plasma nitriding, plasma carburizing, low-pressure carburizing, ion implantation, physical and chemical vapor deposition, salt bath coating, and transformation hardening via high-energy laser and electron beams. The chapter compares methods and includes several example applications.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2024
DOI: 10.31399/asm.tb.pmamfa.t59400391
EISBN: 978-1-62708-479-6
... HSS high-speed sintering LDW laser deposition welding LED light-emitting diode LENS laser-engineered net shaping LFF laser freeform fabrication LOM laminated object manufacturing MA mechanical alloying MEX material extrusion MIM metal injection molding MJ material...
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560309
EISBN: 978-1-62708-291-4
..., including electroslag, TIG, gas, electron-beam, and arc welding as well as vacuum diffusion, forge, friction, electrical-resistance, and explosive welding. It also discusses the effect of welding temperature, pressure, and composition on the transformations that occur in and around the weld, and it includes...
Abstract
This chapter examines the effects of welding on the structure of metal, particularly the changes induced in the isothermal regions adjacent to the weld. It presents more than 150 images identifying structures and features associated with fusion and solid-state welding processes, including electroslag, TIG, gas, electron-beam, and arc welding as well as vacuum diffusion, forge, friction, electrical-resistance, and explosive welding. It also discusses the effect of welding temperature, pressure, and composition on the transformations that occur in and around the weld, and it includes a short section on brazing and braze welding.
Book Chapter
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700215
EISBN: 978-1-62708-279-2
... behavior of AHSS and could seriously affect the structural performance of AHSS components. The ASP led a project to study the welding performance of AHSS for auto body structural components. Five fusion welding processes (MIG pulse/ac, MIG pulse/dc, MIG/laser-assisted, laser, and laser plasma) were...
Abstract
This chapter briefly reviews the experience-based guidelines that were developed for forming and welding advanced high-strength steels (AHSS). It discusses the benefits of using HSS in car body structures and components that are analyzed by the performance indices developed for materials selection.
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