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laser directed-energy deposition

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Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... sintering in the 1980s. One is the AM process of powder-bed fusion, where powder is spread over a build area in a thin layer and subsequently fused locally by an energy source, such as a laser, electron beam, or light source. Another type of AM process developed the 1990s is directed-energy deposition...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... Wiley and Sons , 2020 Fused-Filament Fabrication Laminated Object Manufacturing Solid-Based Additive Manufacturing Processes Fused Deposition Modeling Direct Metal Laser Sintering Selective Laser Melting Three-Dimensional Printing PolyJet Technology Powder-Based Additive...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
...-5 2. Sexton L. , Lavin S. , Byrne G. , Kennedy A. : Laser cladding of aerospace materials . J. Mater. Process . 122 , 63 – 68 ( 2002 ) 10.1016/S0924-0136(01)01121-9 3. Dinda G.P. , Dasgupta A.K. , Mazumder J. : Laser aided direct deposition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
... of an electronic board directing the precise movement of magnetic heads on rotating disks at high speeds and coated with a magnetic material for the purpose of recording or reading at a high speed the data stored The magnetic coating on the disk can consist of small particles, called paniculate media...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... welding processes. The article also describes failure origins in other welding processes, such as electroslag welds, electrogas welds, flash welds, upset butt welds, flash welds, electron and laser beam weld, and high-frequency induction welds. arc welding brittle fracture electrogas welds...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... the chemical composition of surface residue. Various techniques may be used, including energy-dispersive spectroscopy, x-ray diffraction, or gas chromatography/mass spectrometry. Where microbiologically influenced corrosion is suspected as a possible cause or contributor to a failure, deposit samples should...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... such as a stainless steel pick. Corrodent samples should be placed in clean, clearly marked containers. The corrosion deposits should be analyzed. One of the most common analysis techniques is energy-dispersive spectroscopy (EDS). This method, used in conjunction with scanning electron microscopy (SEM), provides...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... of the physical evidence. Magnitude and direction of loading, interaction with other components, damage sequencing in systems, and other valuable information may be reliant upon the investigation and reconstruction of fracture patterns. In this way, inspection and analysis of fracture surfaces may be critical...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... diffraction (XRD) provides chemical composition information for crystalline phases in the corrosion deposit. Energy-dispersive x-ray spectroscopy is elemental analysis, as opposed to the quantitative composition analysis provided by XRD. The technique is used to analyze a well-mixed scale/deposit or different...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
... of the weld image. Ultrasonic Testing In ultrasonic testing, a beam of ultrasonic energy (i.e., nonaudible sound) is directed into a specimen, and either the energy transmitted through the specimen is measured or the energy reflected from interfaces is indicated (see the article “ Fundamentals...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... amplitude or, better yet, the friction energy deduced from the fretting cycles. The (measured) displacement amplitude in fretting must only be considered as a semiquantitative variable. Nevertheless, recent developments allowing direct measurement of the displacement at the contact position, using high...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003536
EISBN: 978-1-62708-180-1
... of crystallographic orientations of the features present in the fracture surface ( Ref 46 ). Direct simultaneous observations of a nonplanar fracture surface in 3D space and the 3D microstructure just beneath it can be extremely useful in understanding and quantifying the failure modes and the relationships between...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... ), where thousands of grains are sampled in a typical measurement. When the material is in tension, the d -spacing increases in the direction of stress, and when the material is in compression, the d -spacing decreases. The presence of residual stresses in the material produces a shift in the XRD peak...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... and friction coefficient initially decrease until viscous forces begin to dominate over contact forces. Fig. 5 The deposition of a thin layer of polymer on the substrate (countersurface) forms a transfer film. A running film then forms on the sliding interface of the polymer. Abstract...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... to that of adhesive wear during sliding ( Ref 3 , 16 ). More severe conditions at the contact lead to the occurrence of surface fatigue, subsurface crack growth, and spalling ( Ref 15 , 17 – 19 ). Very large impact energies bring about failures due to surface fracture and produce rapid material removal ( Ref 20...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... corrosion products, and deposits or coatings). Testing under simulated service conditions Finally, the investigation concludes with a synthesis and interpretation of results. This step may actually require reiteration of previous steps or the introduction of new steps. Similar to design, failure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006943
EISBN: 978-1-62708-395-9
... 9 Crossover or virtual source diameter ( d 0 ), nm >10 4 >10 3 15–25 3–5 Work function, eV 4.5 2.6/2.4 2.8 4.3 Energy spread, eV 1–3 >1 0.3–1 0.2–0.3 Operating temperature, °C (°F) 2500 (4530) 1600 (2910) 1500 (2730) 25 (77) Typical service lifetime, h 40...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... width in the x -direction, and b is the half-contact width in the y -direction. Below the surface of either component, all three principal stresses are compressive. The stress distribution in the subsurface of one of the bodies along the central axis is shown in Fig. 4 . The orthogonal shear stress...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
...: styrene maleic anhydride (SMA) The thin bilayer film of SMA/SAN was attached to the PA, and then the interfacial thickness was measured. Compatibilizer increases the interfacial thickness from 2 to 30 nm. 106 Small-angle x-ray scattering Direct method for the measurement of interfacial layer...