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metal powders

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Published: 30 August 2021
Fig. 5 Generic illustration of a metal additive manufacturing powder-bed fusion process. Source: Ref 3 More
Image
Published: 30 August 2021
Fig. 6 Generic illustration of a metal additive manufacturing (AM) powder-feed process. Source: Ref 3 More
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...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001843
EISBN: 978-1-62708-241-9
... Abstract The operator of an electric transit system purchased a large number of tin-plated copper connectors, putting some in service and others in reserve. Later, when some of the reserve connectors were inspected, the metal surfaces were covered with spots consisting of an ash-like powder...
Image
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
Image
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
Image
Published: 30 August 2021
Fig. 16 Materials property space for room-temperature yield strength versus elongation of additively manufactured (AM) alloys and conventionally manufactured alloys (dashed lines). (a) Steels, nickel alloys, aluminum alloys, TiAl, and CoCrMo. (b) Ti-6Al-4V alloys (powder-bed fusion, or PBF More
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
... Applications and Typical Products In the simplest terms, all plastics processing techniques involve three key steps: fluidizing (plasticating), shaping, and solidification. Raw materials are typically sourced as pellets or powders (thermoplastic) or as monomeric liquid and cross-linking agent (thermoset...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001387
EISBN: 978-1-62708-215-0
... steel plate A sizeable amount of black powder was found at the bottom of the cell. The nickel anode was gouged, mostly at the bottom, and the nickel mass that had melted and resolidified was sticking to the nickel anode ( Fig. 3 ). Fine metallic globules were sticking to the unattacked portion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001165
EISBN: 978-1-62708-234-1
... corrosion resistance. Etching of the core structure showed a selective form of cast iron corrosion (spongiosis or graphitic corrosion) which lowered the strength of the cast iron enough that a knife could scrape off a black powder (10.85% C, 1.8% S, 1.45% P). Analysis showed that some of the “sulfate” found...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... to account for the dimensional change observed in the failed rolls. This paper details the failure analysis and resulting research it inspired. It also provides recommendations for cast material choice in highly nitriding atmospheres. Metal powders Nitrogen absorption Reduction furnaces Rolls...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... is to describe general root causes of failure that are associated with wrought metals and metalworking. This includes a brief review of the discontinuities or imperfections that may be common sources of failure-inducing defects in bulk working of wrought products. This article does not address powder metallurgy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047793
EISBN: 978-1-62708-217-4
.... The microstructure of the metal in the impeller exhibited scattered porosity and carbide particles and appeared to be a sintered powder metallurgy compact. Metallographic examination of a section through the damaged splines and of a section through the adjacent undamaged part of the same splines disclosed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
.... Because only the coil I.D. crown position had the scale, a circumferential temperature gradient around the pipe was inferred. This means that the fire side of the coil (inner diameter) reached metal temperature of at least 480 C while the metal temperature on the casing side of the coil (outer diameter...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001719
EISBN: 978-1-62708-231-0
...) and polishing (Al 2 O 3 powder). Fig. 14 EDS Scan at 30,000× in a secondary crack with third phase (identified as copper) of failed locomotive axle. Discussion and Analysis Liquid Metal Embrittlement LME as defined generally is the decrease in strength or ductility of a solid metal caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001674
EISBN: 978-1-62708-234-1
... that the preferential attack of the gold was due to HCN formed by decomposition of the explosive powder at high temperatures. Other associated reactions were also observed including the subsequent attack of the solder by the gold corrosion product and degradation of the plastic header. Bridgewires Detonators...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001277
EISBN: 978-1-62708-215-0
...) and powder x-ray diffraction (XRD). Fig. 4 presents EDS results for the bulk internal deposits from Sample 1. The EDS and XRD analysis results were similar for all four tube samples. XRD identified the iron oxide magnetite (Fe 3 O 4 ), metallic copper (Cu), the iron oxides hematite (Fe 2 O 3 ) and wüstite...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001389
EISBN: 978-1-62708-215-0
... ( Fig. 3 ), which appeared to be corrosion film or possibly excess brazing flux that had not been properly removed during the washing operation. Fig. 3 Schematic showing the silver-refractory metal contacts Testing Procedure and Results Chemical Analysis/Identification Coatings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001177
EISBN: 978-1-62708-234-1
... or the outside of the tube. However, indications of tightly closed cracks could be seen on the outer surface, which had been in contact with the chloride solution. A test for cracks by the magnetic powder technique was not possible with the austenitic material. By means of the colour penetration process, however...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... stainless steels of the 18 to 20% Cr and 8 to 10% Ni class (CF-8). Manifestations of Cavitation Erosion Cavitation erosion typically begins with deformation rumpling and work hardening of metal surfaces, often with delineation of grain and phase boundaries, as shown in Fig. 1(a) , 2(a) , and 3...