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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
... considerations, and quality assurance. The emphasis is on the design and metallurgical aspects for the two main types of metal AM processes: powder-bed fusion (PBF) and directed-energy deposition (DED). The article also describes the processes involved in binder jet sintering, provides information on the design...
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Published: 30 August 2021
Fig. 2 Effect of energy source on deposition rate and feature quality for the directed-energy deposition (DED) and powder-bed fusion (PBF) processes. Source: Ref 24 More
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Published: 30 August 2021
Fig. 17 Summary of stress ( S ) versus cycles to failure ( N ) ( S - N ) data for laser powder-bed fusion (PBF), electron beam melting (EBM) PBF, and directed-energy deposition (DED) wire at R = 0.1. Metallic Materials Properties Development and Standardization (MMPDS) data for cast More
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Published: 30 August 2021
Fig. 1 Power ( P ) and velocity ( V ) in metal additive manufacturing processes by powder-bed fusion, wire-feed electron beam, and directed-energy (laser) deposition processes. Source: Ref 5 More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001076
EISBN: 978-1-62708-214-3
... to deposit of silver-sulfur compound. Unetched. 39×. Corrosion Morphology An energy-dispersive spectroscopy (EDS) qualitative analysis detected a large quantity of sulfur, as well as the presence of silver, in the deposit under the arrow in Fig. 7 . The results of the EDS analysis are shown...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001276
EISBN: 978-1-62708-215-0
.... 61×. (a) Unthinned regions on the ring sections. (b) Thinned regions on the ring sections. Chemical Analysis/Identification Corrosion or Wear Deposits Both bulk internal deposits and pit deposits were analyzed using energy dispersive x-ray spectrography. The deposits were found...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001318
EISBN: 978-1-62708-215-0
.... 13 EDS spectrum obtained from deposits on the cylinder side of a disc exposed to the hydrogen/ethylene blend. Fig. 14 EDS spectrum (low-energy band) obtained from deposits on the cylinder side of an exposed disc. An isolated indication of Hg was detected as evidenced by the broadening...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001390
EISBN: 978-1-62708-215-0
... in the longitudinal direction. Fig. 4 Optical micrograph showing crack initiation in a region of underdeposit attack Chemical Analysis/Identification Corrosion or Wear Deposits Energy-dispersive x-ray analysis of the brown spots on the heater surfaces indicated that the deposits were composed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001528
EISBN: 978-1-62708-219-8
..., another like it, and two heaters are part of a 60,000 liter (16,000 gallon) direct-contact hot water system that has been in service for five years. The approximately 4 m (13.5 ft) high, 2.5 m (8 ft) diameter tanks are fabricated from 3.18 mm (0.125 inch) thick Type 304 stainless steel sheet...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001622
EISBN: 978-1-62708-222-8
... of residue can be seen as adherent deposits, and direct comparison can be conducted between nondiscolored and discolored areas with regard to apparent cleanliness and surface roughness. Energy-dispersive spectroscopy is useful for determining relative percentages of the elements above Atomic No. 5...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001628
EISBN: 978-1-62708-234-1
... or energy levels characteristic of that element, identifying the approximate concentration of each major element in the sample. The portable instrumentation is designed for rapid direct analysis without extensive surface preparation. The purpose of performing these analyses was to detect any metallic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... metals or other materials that have been deposited on surfaces by impact or rubbing, porosity, and heat damage. Rub marks, scores, and indentations can provide important information concerning contact between the subject part and other components. The direction from which contact was made may...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Examination The presence of distortions or plastic deformation in a component can indicate the direction of loading that was applied. The shape of indentations can also allow the nature of an impacting part to be determined. In some cases, there may be deposits of the impacting material, including...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
... at the termini of laboratory opened cracks were analyzed in situ using energy-dispersive x-ray spectroscopy (EDS). The typical results of an in situ EDS analysis of the crack surface deposits are presented in Fig. 7 . The deposit contains major amounts of iron, silicon, calcium, potassium and chlorine plus...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001477
EISBN: 978-1-62708-229-7
.... Prior to the test, cracking was present already, extending up to 90% of the wall thickness. Analyses of brownish deposit material did not reveal the presence of any substances likely to cause stress-corrosion cracking of a Ni-Cu-Mo low-alloy steel. Boilers Pressurizing Fe-0.16C-1.11Ni-0.26Mo...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... corrosion conditions. The buckets are fabricated by conventional investment casting (equiaxial grains) and uncoated. One of the controlled elements that has a direct influence on the bucket behavior at high temperature is the grain size. 1 Typically, the maximum size of the grain, and sometimes...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001323
EISBN: 978-1-62708-215-0
... and analyzed by energy dispersive x-ray spectroscopy (EDS). Compounds in the deposits were identified using powder x-ray diffraction (XRD). The EDS results of the inner diameter deposit analysis are shown in Fig. 8 . The XRD results showed that the deposits consisted primarily of iron oxide/magnetite (Fe 3 O...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001648
EISBN: 978-1-62708-234-1
...; and the dark, nonmetallic deposit. The results are presented in Table 3 . Energy-dispersive spectroscopy is an accepted means for semiquantitatively addressing the elemental composition of a material. For example, the elemental analysis results for the unaffected parent metal compare favorably (within a few...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001666
EISBN: 978-1-62708-229-7
... and enabled its position to be established relative to the crack or other features. Bulk deposits were analyzed using conventional x-ray diffraction, ion chromatography, and energy dispersive x-ray analysis (EDXA) with the scanning electron microscope (SEM). Replica deposits were analyzed with the EDXA...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
.... Although, many of the principles that apply to Rankine cycle systems also apply to systems using other steam cycles or to systems using working fluids other than steam. Boilers/steam generators work on the principle of conversion of the chemical energy in fuel into thermal energy to generate steam...