1-20 of 593 Search Results for

laser surface treatment

Sort by
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006422
EISBN: 978-1-62708-192-4
..., adhesion, and fatigue, as well as oxidative and corrosive wear. Surface modification techniques, such as hardening by induction heat treating, weld overlay, thermal spray coating, coating via physical vapor deposition (PVD), and laser surface treatment, are also discussed for improving roll service life...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006421
EISBN: 978-1-62708-192-4
... ). The variety of lasing media available can generate laser beams of various wavelengths and unique characteristics. Applications include bar code readers, fiber optics communication, fast, precision machining of of materials, and surface heat treatment and engineering of structural materials. Important...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005808
EISBN: 978-1-62708-165-8
... heat treatment, laser surface melting such as skin melting or glazing, laser direct metal deposition such as cladding, alloying, and hardfacing, laser physical vapor deposition, and laser shock peening. The article provides detailed information on absorptivity, laser scanning technology...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006436
EISBN: 978-1-62708-192-4
... ). Fig. 6 Wear test results for untreated and plasma-nitrided Ti-6Al-4V. Source: Ref 18 Laser Surface Treatments Laser surface heating and introduction of hard particles into the surface via reaction with gas (such as nitrogen or methane) or heating of surface deposits (graphite or boron...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005771
EISBN: 978-1-62708-165-8
.... For details, see the article “Induction Surface Hardening of Steels” in this Volume. Laser Surface Heat Treatment Laser surface heat treatment is widely used to harden localized areas of steel and cast iron machine components. This process is sometimes referred to as laser transformation hardening...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003681
EISBN: 978-1-62708-182-5
... examples include: The intergranular corrosion resistance of Al 6013-T651 was improved by excimer laser surface treatment in nitrogen atmosphere, resulting in formation of AlN ( Ref 69 ). The pitting corrosion resistance of Ti-6Al-4V alloy (UNS R56400/R56401) was improved by excimer laser surface...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006985
EISBN: 978-1-62708-439-0
... intended for safety-critical structural applications (i.e., applications where part failure causes system failure and injury to users). Process-induced defects, surface roughness, microstructure, residual stress, and postprocessing procedures such as heat treatments and surface finishing can all affect...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005673
EISBN: 978-1-62708-198-6
... of nitric and hydrofluoric acids (HNO 3 -HF), to remove oxides formed in heat treatment. Once the surface is cleaned and the bulk composition of the stainless steel is exposed to air, the passive film forms immediately. Passivation Techniques During handling and processing operations...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002168
EISBN: 978-1-62708-188-7
... lasers. It discusses the operating parameters of concern in percussion drilling and trepanning. The process variables in surface treatment and laser cutting, as well as the operating parameters of concern in laser welding are reviewed. The article also explains the various categories of surface treatment...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001445
EISBN: 978-1-62708-173-3
.... , Laser Focus , Feb 1976 , p 44 15. Alexander J. , “Penetration Studies in Laser and Arc Augmented Laser Welding,” Ph.D. thesis, London University, 1982 16. Duley W.W. , “Laser Surface Treatment of Metals,” Draper C.W. and Mazzoldi P. , Ed., NATO ASI Series E...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006990
EISBN: 978-1-62708-439-0
... by the microstructure but are also affected by porosity and surface roughness. Fatigue failure in AM materials is also influenced by porosity, surface roughness, microstructure, and residual stress due to applied manufacturing processing parameters. Post-processing treatments can further influence fatigue failure in AM...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001303
EISBN: 978-1-62708-170-2
... Abstract This article provides a brief review of the classification and characteristics of cast irons. It describes the processes used to clean iron castings, including mechanical cleaning and finishing and nonmechanical cleaning. The article discusses surface treatments used to extend casting...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006853
EISBN: 978-1-62708-392-8
.... Laser Treatment In contrast with sandblasting and acid etching techniques, laser treatment exerts zero risk of surface contamination, because there is no direct contact between the laser and the biomaterial ( Ref 51 ). Laser surface treatments also tend to improve material wettability by altering...
Image
Published: 31 December 2017
Fig. 45 Temperature as a function of time for various laser processing conditions as predicted by thermal modeling during laser surface heat treatment of a metallic glass. Source: Ref 22 More
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006899
EISBN: 978-1-62708-392-8
... is rough compared with the parts produced by machining processes. Therefore, a polishing step may be needed to provide a smooth surface texture. In addition, heat treatment may be required to increase the part density for better mechanical properties in metal printing processes. The final step...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006561
EISBN: 978-1-62708-290-7
... ). Because the build plate is routinely reused, it can also develop stresses, and, therefore, it must be creep flattened by placing weighted blocks on it during the stress-relief treatment ( Fig. 3b ). Fig. 2 Illustration of the effect of a stress-relief heat treatment on strain in laser-melted iron...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006964
EISBN: 978-1-62708-439-0
... Abstract This article briefly introduces the concept of creep properties of additively manufactured (AM) alloys, with a focus on the effects of the characteristic microstructure of AM alloys on creep performance. Relevant postprocessing treatment also is discussed, in relation to improved creep...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006566
EISBN: 978-1-62708-290-7
... ). Average cooling rates can vary significantly depending on the type of AM process. For example, in laser-assisted directed-energy deposition (L-DED) of 316L stainless steel, the cooling rate is reported to be approximately 10 3 K/s ( Ref 36 ), because the focused laser beam and the build surface...
Image
Published: 12 September 2022
Fig. 7 Influence of heat and chemical treatments on surface roughness parameter ( R a ), water and formamide contact angle, and surface energy. SLM, selective laser melting; HF, hydrofluoric acid; HNO 3 , nitric acid. Adapted from Ref 129 More
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006888
EISBN: 978-1-62708-392-8
... than titanium and cobalt alloys, both in conventional and AM processes ( Ref 20 , 22 ). With surface treatments or coatings (e.g., hydroxyapatite), the biocompatibility and corrosion resistance of stainless steels can be improved, with potential cost-benefit advantages relative to titanium and cobalt...