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laser surface melting

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
...Abstract Abstract This chapter discusses surface engineering treatments, including flame hardening, induction hardening, high-energy beam hardening, laser melting, and shot peening. It describes the basic implementation of each method, the materials for which they are suited, and their effect...
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
... laser and electron beams. The chapter compares methods and includes several example applications. chemical vapor deposition electron beam melting ion implantation laser melting low-pressure carburizing physical vapor deposition plasma carburizing plasma nitriding salt bath coating surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900305
EISBN: 978-1-62708-358-4
..., directed sources of heat and are used for many types of surface modification. As shown in Fig. 16-15 , depending on power input, high-energy laser beams can be used for a variety of applications, including cutting, welding, surface melting and alloying, and localized surface hardening ( Ref 3 , 55 - 58...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... is delivered to the metal through the depth of the weld, not just to the top surface. Deep-penetration laser beam welding is similar to high-power electron-beam welding in a vacuum. A photomicrograph of a deep-penetration weld is shown in Fig. 4.13 . Fig. 4.12 Comparison of (a) melt-in or conduction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... ions Surface modification by a combination of laser-beam melting and alloying Phosphate Chemical Conversion Coatings Phosphate coating is the treatment of iron, steel, galvanized steel, or aluminum with a dilute solution of phosphoric acid and other chemicals in which the surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
..., the metal melts in the vicinity of the current flow. Pressure keeps the faces together. When the current is interrupted, a solidified weld nugget is formed. The nugget is contained within the metal being joined and does not reach an external surface. Resistance welding is fast. When done locally, a spot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... protective linings barrier protection chemical inhibition galvanic protection surface preparation inspection quality assurance electroplating electroless plating hot dipping thermal spraying cladding pack cementation vapor deposition ion implantation laser processing COATINGS are the most...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460173
EISBN: 978-1-62708-285-3
... and gas pressure or by decreasing melt flow. Metals in the liquid state are characterized by high surface tension and low viscosity. Therefore, overheating of the melt results in finer powder. Particles produced by gas atomization have near-spherical shape, which differs from particles manufactured...
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
.... Fig. 5.20 Laser-additive manufacturing process. (a) Powder feed stock is added by gas jets to the melt pool formed by laser. (b) Direct metal deposition of titanium foil shape. Courtesy of S. Kelly, Pennsylvania State University. Source: Ref 5.11 Directed metal deposition is conducted...
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 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250001
EISBN: 978-1-62708-345-4
... such as spur gears. Electrical Discharge Machining (EDM) The EDM process uses electricity to melt or vaporize the material being cut. Many of the attributes and limitations outlined for laser machining are also applicable to EDM. Abrasive Water Jet Machining Abrasive water jet machining...
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...
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
...Abstract Abstract This chapter provides a basis for understanding the influence of stainless steel alloy composition and metallurgy on the welding process, which involves complex dynamics associated with melting, refining, and thermal processing. It begins with an overview of the welding...
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: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... is used in the United Kingdom as a coolant instead of water, in part because of safety concerns. Major advancements in automatic electronic controls provide near-optimum, reproducible conditions throughout the melt cycle. Direct benefits include better surfaces and internal quality of ingots, improved...
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
... molten metal is expelled ( Fig. 3.11 ). This process continues as random melting, arcing, and expulsion occur over the entire cross-sectional surface. During flashing, many active areas are in various stages of this sequence. Flashing surfaces act as heat sources, and the steep thermal profile...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
... subsieve size. Powder flow and powder rheology are being researched to understand powder spreading and flow behavior in several key AM processes (laser-based melting and/or sintering, electron beam melting, and binder jet technologies). Although many aspects of powder flow have been studied...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... treatment is widely used to harden localized areas of steel and cast iron machine components. The heat generated by the absorption of the laser light is controlled to prevent melting and is therefore used in the selective austenitization of local surface regions, which transform to martensite as a result...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230361
EISBN: 978-1-62708-298-3
... are less dependent on the angle of incidence of the flux of depositing material than with the sputter deposition and vacuum evaporation, due to gas scattering and sputtering/redeposition and atomic peening. (Peening refers to bombarding or impacting a surface with atoms, hard particles, laser beam, and so...