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powder compaction

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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
... a hardness of approximately 630 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...
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
.../Fretting Wear in Heat Exchanger Tubes , J. Pressure Vessel Technol. (Trans. ASME) , Vol 109 , 1987 , p 265 – 274 10.1115/1.3264862 35. de Gee A.W.J. , Commissaris C.P.L. , and Zaat J.H. , The Wear of Sintered Aluminium Powder (SAP) under Directions of Vibrational Contact...
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
... 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 Fig. 33 Effect of atmospheric pressure on the friction and wear of a carbon steel cylinder...
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
... , 1992 , p 263 – 270 2. De Gee A.W.L. , Commissaris C.P.L. , and Zaat J.H. , The Wear of Sintered Aluminium Powder (SAP) Under Conditions of Vibrational Contact , Wear , Vol 7 , 1964 , p 535 – 550 10.1016/0043-1648(64)90209-1 3. Rabinowicz E. and Hozaki K...
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
..., the protective scales made by the compaction of the oxidized fragments are disrupted and no longer remain in place. At the same time, if contact temperature, due to environmental conditions or frictional heating, is too high, the material in the contact regions is softened and unable to sustain the compacted...
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
... fracturing on the surface and crushing of debris; stage 2, extrusion of pulverized debris in interstices and compaction of a fine grained film; stage 3, nucleation of cracks along the weak film/substrate interface; and stage 4, lateral propagation of interfacial cracks and delamination of the compacted film...
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
... with compacted powdered debris (fretting) Smooth gradual transitions in wastage Multiple brittle appearing fissures External surface and internal fissures contain reaction scale coatings. Fracture after limited dimensional change Scanning electron microscopy, 20 to 10,000× (fracture surface...
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 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 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: 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.a0003555
EISBN: 978-1-62708-180-1
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 the discontinuity and indicates its size, shape, and extent. Frequently, a fluorescent material is combined with the particles so that discontinuities can be detected visually under ultraviolet light. This method reveals surface cracks that are not visible to the naked eye. Most commercial powders for MPI have...
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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... that might not normally be considered as hard or even abrasive, such as iron oxide powder, are excellent lapping compounds. Hard, coarse foreign particles or iron, steel, or other metals introduced during assembly of the machine produce small depressions considerably different from those produced...