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selective laser melting

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2022
DOI: 10.31399/asm.tb.mbheaktmse.t56030001
EISBN: 978-1-62708-418-5
.... Another method of fabricating bulk HEAs is by additive manufacturing (AM) ( Ref 78 , 79 ). Recently, scientists fabricated HEAs by selective laser melting ( Ref 80 ), directed energy deposition ( Ref 81 ), electron beam melting ( Ref 82 ), binder jetting ( Ref 83 ), three-dimensional (3D) ink-extrusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
... metallurgy. hardness number quenchants laser melting shot peening surface hardening THE SURFACE-ENGINEERING TREATMENTS described in this chapter include selective surface hardening by flame, induction, or high-energy beam heating, laser melting and quenching, and shot peening. None...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... needed to weld steel. Hydrogen, natural gas, propane, and proprietary gases are used only to a limited extent in oxyfuel gas welding or brazing of metals with a low melting temperature. Only by burning selected fuel gases with high-purity oxygen in a high-velocity flame can the high heat transfer...
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
... generated by the absorption of the laser light is controlled to prevent melting and therefore is used to selectively austenitize local surface regions that transform to martensite as a result of rapid cooling by the conduction of heat into the bulk of the workpiece. This process is sometimes referred...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900305
EISBN: 978-1-62708-358-4
..., or the irradiated workpiece must be coated with a light-absorbing material. Laser and electron beam surface heat treatments are used to selectively harden localized areas of steel and cast iron components. The heat generated by irradiation is controlled to prevent melting; therefore, local regions can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350001
EISBN: 978-1-62708-315-7
... Localized surface hardening (flame, induction, laser, and electron-beam hardening) Improved wear resistance through the development of a hard martensitic surface Laser melting Improved wear resistance through grain refinement and the formation of fine dispersions of precipitates Shot peening...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300335
EISBN: 978-1-62708-323-2
... are approximately 67 HRC. Selective hardening: Selected parts of a material, such as a particular surface or profile on a gear tooth, can be locally heated with flame, induction, laser, electron beam, and so on to raise it to the austenitizing temperature. With quenching, a selected area on a part can be made...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... must be capable of dissolving, or alloying with, some of the metal on which it flows. The successful joining of components by the brazing process depends on the selected brazing filler metal having a melting temperature >450 °C (>840 °F) that wets the base metal without melting...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550223
EISBN: 978-1-62708-307-2
..., and grades of commercially pure titanium and alpha and near-alpha, alpha-beta, and beta titanium alloys. It describes primary and secondary fabrication processes, including melting, forging, forming, heat treating, casting, machining, and joining as well as powder metallurgy and direct metal deposition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700215
EISBN: 978-1-62708-279-2
... for materials selection. forming welding advanced high-strength steels car body structures performance indices THE INCREASED USE OF advanced high-strength steels (AHSS) has created a need to develop a knowledge base of data and experiences aimed at the successful applications of the new materials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250001
EISBN: 978-1-62708-345-4
... electricity to melt or vaporize the material being cut. Many of the attributes and limitations outlined for laser machining are also applicable to EDM. As noted at the bottom of Fig. 23 , inspection is an integral part of the gear manufacturing process. As with all manufactured products, gears must...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290001
EISBN: 978-1-62708-306-5
... a liquid metal that melts above 450 °C (840 °F). A sound brazed joint generally results when an appropriate filler alloy is selected, the parent metal surfaces are clean and remain clean during heating to the flow temperature of the brazing alloy, and a suitable joint design is used that allows capillary...
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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120079
EISBN: 978-1-62708-269-3
.... In LBM, material is removed by focusing a laser beam and a gas stream on a workpiece. The laser energy causes localized melting, and an oxygen gas stream promotes an exothermic reaction and purges the molten material from the cut. Titanium alloys are cut at very rapid rates using a continuous-wave carbon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... distortion. Brazing at the aging temperature is impractical because few filler metals melt and flow at these temperatures. Selection of filler metal for brazing titanium alloys is critical because titanium alloys react with many of the constituents of brazing filler metals to form undesirable...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290061
EISBN: 978-1-62708-306-5
... process variables are welding current, welding time, electrode force, and electrode material and design. High welding currents are required to resistance heat and melt the base metal in a very short time. The time to make a single resistance weld is usually <1 s. For example, welding two pieces of 1.6...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120131
EISBN: 978-1-62708-269-3
... with advanced rapid prototyping methods to directly manufacture three-dimensional components. The approach is similar to rapid prototyping techniques, such as stereolithography and selective laser sintering. However, it is different in that a fully dense, high-integrity part is claimed to be made without...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370115
EISBN: 978-1-62708-447-5
... and the melting capacity, as well as the foundry’s capability for high-strength and thin-walled castings. The competitiveness of a foundry is impacted by the selection of the right kind of furnace and its melting capacity to meet the needs of the parts being molded. Environmental regulations impact the choice...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350231
EISBN: 978-1-62708-315-7
... impinging upon the joint. laser hardening. A surface-hardening process that uses a laser to quickly heat a surface. Heat conduction into the interior of the part will quickly cool the surface, leaving a shallow martensitic layer. laser melting. See laser surface processing. laser surface processing. The use...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7