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powder compaction

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Published: 15 January 2021
Fig. 32 Illustration of debris layer of steel/steel interface. (a) Powder debris bed in a steel/steel interface. Adapted from Ref 71 . (b) Debris platelets generated from the compaction and agglomeration of thin oxide debris More
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 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 Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... the surface of one impacting body by the other), partial ring cracks, and delamination layers. The removed material is pulverized and compacted. At acute contact angles, where the largest slip occurs, the wear debris is also sheared, transferred, and redeposited. Delamination is generally the dominant...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... temperatures. It may happen when the wear debris, initially formed by adhesive wear, remains trapped between the mating surfaces. The debris is then strain hardened, comminuted, and oxidized because of the very high surface area and high density of the surface defects. Such oxides are then compacted...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
..., it can become compacted, and its color is then black and iridescent. In this respect, it is identical to the mineral hematite, which in massive form is blackish but is red when powdered. On aluminum, the debris is black and consists of aluminum particles surrounded by Al 2 O 3 . The aluminum content...
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
... rate also depends on the stabilized wear mechanism. Fretting wear usually promotes either abrasive wear or adhesive wear phenomena. Abrasive wear implies a plowing process of the softer material by harder asperities, favoring the formation of oxide powder debris. It could be a two-body abrasive wear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... modes of material removal occur during impact. Brittle deformation is linked to the creation of pits (formed when material is adhesively plucked from the surface of one impacting body by the other), partial ring cracks, and delamination layers. The removed material is pulverized and compacted...
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: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
.... A detailed heat-exchanger type classification includes different criteria, such as the transfer process (e.g., indirect and direct contact types), number of fluids (e.g., multifluid types), surface compactness (e.g., compact or noncompact), construction (e.g., tubular, plate type, extended surface type...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... that appear brittle. Gouging, abrasion, polishing, or erosion Galling or storing in direction of motion Roughened areas with compacted powdered debris (fretting) Smooth gradual transitions in wastage Multiple brittle appearing fissures External surface and internal fissures contain...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... Gouging, abrasion, polishing, or erosion Galling or scoring in direction of motion Roughened areas with compacted powdered debris (fretting) Smooth gradual transitions in wastage Multiple brittle-appearing fissures External surface and internal fissures contain reaction scale coatings...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... of nylon 6/6 is reduced by four decades when the polymer absorbs water at ambient conditions. Added antistatic agents decrease surface resistivity because the polar additives migrate to the surface of the polymer and absorb humidity. In contrast, conductive fillers, such as carbon black powders...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... (or worm wheel) and a worm. Figure 4 shows a double-enveloping worm-gear set. Worm-gear sets are used where the ratio of the speed of the driving member to the speed of the driven member is large and where compact right-angle drive is required. If a worm gear such as that shown in Fig. 4 engages...
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
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 this article. A discussion of the appearance is also in the article “Mechanisms and Appearances of Ductile and Brittle Fracture in Metals” in this Volume. Fig. 16 Ductile tearing on a plane of maximum normal stress at the tip of a compact tension specimen. Material is O1 tool steel. Source: Ref 11...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... HV. 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...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006923
EISBN: 978-1-62708-395-9
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
... scale-forming alloys appear to be much more resistant to carburization than the chromia scale-formers ( Ref 16 ). Nitridation Nitridation of alloys in ammonia environments is well known in ammonia and heat treating industries ( Ref 17 ). Nitridation attack by N 2 is known in the powder metal...