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powder metallurgy

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Published: 01 January 2002
Fig. 33 Light micrograph of a melted region found on an AISI D2 powder metallurgy die after heat treatment. Specimen etched with Marble's reagent More
Image
Published: 30 August 2021
Fig. 31 AISI D2 powder metallurgy die component that melted and deformed because of flame impingement during heat treatment. (a) End view. Original magnification: 4.5×. (b) Microstructure in the affected region. Etched with Marble’s reagent. Original magnification: 150× More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001784
EISBN: 978-1-62708-241-9
... of low carbon steel formed in a powder metallurgy process. A number of flaws were found including nonuniform wall thickness, poor geometric design with sharp corners as stress raisers, and incomplete sintering evidenced by unsintered particles. These were determined to be the primary cause of failure...
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 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: 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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... of hydrogen-ion activ- ity PI polyimide PM preventive maintenance P/M powder metallurgy PMMA polymethyl methacrylate POD probability of detection PP polypropylene PPS polyphenylene sulfide PREN pitting resistance equivalent number PS polystyrene PSO point surface origin PSZ partially stabilized zirconia PTFE...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001548
EISBN: 978-1-62708-219-8
... the adhesive used to bond the plywood to the aluminum. From compounds naturally occurring in plywood. From compounds added to the plywood from an external source. The technical expert up to this point was by training a materials engineer, with a strong background in metallurgy. He was not expert...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001665
EISBN: 978-1-62708-231-0
... of the scale on the “rock candy” fracture surface was chipped off and ground into a powder. This was used to obtain a Debye-Scherrer diffraction pattern using cobalt radiation. The results, together with the patterns for FeO, Fe 3 O 4 , Fe 2 O 3 and Cu 2 O taken from the ASTM powder pattern file, are shown...
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
... 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 interstitial (ELI) metal...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
..., stainless steel, age-hardening aluminum alloys, etc.), its general product form (e.g., wrought, cast, powder metallurgy, etc.), and the processing method (e.g., forged, die cast, injection molded, etc.). All of these factors must be considered when the shape of a part is defined during configuration design...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
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.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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
...-Alloy Castings from All Processes, B917/B917M, 2009 . ASTM International , West Conshohocken, PA ( 2009 ). 10.1520/B0917_B0917M-09 , www.astm.org 3. Hatch J.E. (ed.): Chapter 8: properties of commercial casting alloys . In: Aluminum: Properties and Physical Metallurgy , pp. 338...
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
..., then resort to stainless filler. Fig. 14 Area marked for contour adjustment just upstream of cavitation damage on a turbine blade. Courtesy of T.J. Spicher The difficulties associated with what some refer to as “mixed metallurgy” are worth emphasizing. Figure 15 is an example of accelerated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001598
EISBN: 978-1-62708-232-7
... liquid penetrant tested, and no indications were observed. The vessel was then placed in an induction furnace contained within a graphite crucible. Alumina powder was placed on the bottom of the graphite crucible to contrast any glass that might leak from the melter during the test. A prototypic charge...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... Abstract This article first reviews variations within the most common types of gears, namely spur, helical, worm, and straight and spiral bevel. It then provides information on gear tooth contact and gear metallurgy. This is followed by sections describing the important points of gear...
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
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... areas are hardened. Original magnification: 2× Failures due to Burning and Melting Temperature-control problems can cause difficulties other than overaustenitization; burning or incipient melting can also occur in extreme cases. Figure 31(a) shows an end view of a powder metallurgy die...