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porous powder metallurgy

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
... to ensure a bimodal microstructure were recommended. Ceramic coatings Sintering (powder metallurgy) Surgical implants Ti-6Al-4V ELI UNS R56407 Fatigue fracture Background Total knee prostheses were retrieved from patients after radiographs revealed fracture of the Ti-6Al-4V extra low...
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
... additive manufacturing processes by powder-bed fusion, wire-feed electron beam, and directed-energy (laser) deposition processes. Source: Ref 5 Metallic feedstock for fusion-based AM is typically of weldable, powder metallurgy, and castable alloys that include aluminum alloys, cobalt-chromium...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... and sulfur treatments for sulfide, alumina, and silicate inclusions ( Ref 19 ). Hard inclusions in the workpiece material can abrade the cutting tool material ( Ref 20 ). Inclusions, porosity, and oxide films in powder metallurgy steels can reduce their machinability, but closing the pores, increased...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... to carburization than the chromia scale-forming alloys ( Ref 19 ). Nitridation Nitridation of alloys in ammonia environments is well known in ammonia and heat treating industries ( Ref 20 ). Nitridation attack by N 2 also is known in the powder metallurgy industry. The kinetics of nitridation in N 2...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... investigation may require several experts in different disciplines of engineering, physical science, metallurgy, or an understanding of corrosion science and engineering. High-temperature corrosion may occur in numerous environments and is affected by factors such as temperature, alloy or protective coating...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... as compared to traditional ceramics). For the present purpose, technical ceramics are defined as fine-grain (as opposed to coarse) ceramics made of high-purity powders, oxides, and/or non oxides (same as for refractories), with very little batch-to-batch variability and as little as possible liquid-solid...
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
... 60–100 11–18 31,540–63,000 10,000–20,000 k Thermal conductivities (b) W/m ⋅ K Btu ⋅ in./h ⋅ ft 2 ⋅ °F Calcium phosphate 3.6 25 Calcium sulfate 2.3 16 Magnetic iron oxide 2.9 20 Silicate scale (porous) 0.09 0.6 Steel 24.5–44.7 170–310...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
... fragile or friable specimens and corrosion or oxidation specimens. Dyes or fluorescent agents may be added to epoxies for the study of porous specimens such as thermal spray coated specimens. Epoxy resins are much more useful in failure analysis work than acrylic resins. Most epoxies are cured at room...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
...-viscosity epoxy is used. Epoxies are very suitable for mounting fragile or friable specimens and corrosion or oxidation specimens. Dyes or fluorescent agents may be added to epoxies for the study of porous specimens, such as thermal-spray-coated specimens. Epoxy resins are much more useful in failure...
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
... the liquid penetrant may corrode the metal. Surface films may prevent detection of discontinuities. Penetrant may be a source of contamination that masks results in subsequent chemical analysis of fracture surfaces. The process is generally not suited to inspection of low-density powder-metallurgy...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... of austenitic stainless steels or caustic cracking of low-alloy steels. The analyst should bear in mind, however, that sometimes the boundary between SCC and hydrogen embrittlement may not be very clear, depending on the understanding of the physics, chemistry, and metallurgy of a particular situation. The more...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... of the physics, chemistry, and metallurgy of a particular situation. The more important concern for most failure analysts or their clients or internal customers is whether the investigation can provide insight on prevention strategies. In both SCC and hydrogen embrittlement, the presence of hydrogen is clearly...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... of fracture surfaces. The process is generally not suited to inspection of low-density powder metallurgy parts or other porous materials. The technique involves the spreading of a liquid penetrant on the sample. Liquid penetrants can seep into small cracks and flaws (as fine as 1 μm) in the surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
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
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... (a) Internal cavity or porous area along central axis Centerline or axial shrinkage B 300 Porous structures caused by numerous small cavities B 310 Cavities according to B 300, scarcely perceptible to the naked eye B 311 (a) Dispersed, spongy dendritic shrinkage within walls of casting...