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particle shape

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Published: 01 December 2019
Fig. 9 SEM micrograph showing spherically shaped particles More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... Abstract Erosion occurs as the result of a number of different mechanisms, depending on the composition, size, and shape of the eroding particles; their velocity and angle of impact; and the composition of the surface being eroded. This article describes the erosion of ductile and brittle...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
... from erosion ( Ref 44 – 46 ). Erosion occurs as the result of several different mechanisms, depending on the composition, size, and shape of the eroding particles; their velocity and angle of impact; and composition and properties of the surface material being eroded. The sensitivity of elastic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001217
EISBN: 978-1-62708-235-8
... coarser network of rod-shaped and plate-shaped precipitates was found, that probably corresponded to the primary grain boundaries, or to the grain boundaries or twin planes of the austenite formed during solidification of the melt. These particles could have been aluminum nitride judging by their shape...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
... impart two-body wear damage to component parts. They are not constrained by another solid, as distinguished from grinding, which is discussed later. Abrasive Particle Characteristics Abrasive particle characteristics, such as shape, density, size, hardness, and their relation to wear rate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047998
EISBN: 978-1-62708-225-9
... in the inner-ring raceway which had been softened by the elevated temperatures reached during the failure. Broken retainers and worn and bent out of shape seals were found. Penetration of gritty particles, water and other corrosive agents and leakage of lubricant out of the bearing permitted by the worn seals...
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
... a region on fracture surface containing a number of spherically shaped particles. Magnified SEM image of the same region is shown in Fig. 9 . Kerlins and Phillips [ 3 ] suggested the presence of large and small sulfide inclusions in dimples of fractured steel surface serve as void-nucleating sites...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047856
EISBN: 978-1-62708-217-4
... treated to a specified hardness of 36 to 40 HRC. Investigation Visual examination revealed H-shaped cracks in the wall between the knuckle-pin flanges ( Fig. 1a ). The cracks originated as circumferential cracks, then propagated transversely into the bearing-bore wall. Magnetic-particle and x-ray...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001589
EISBN: 978-1-62708-235-8
... or particles during the plating. The possible sources of fibers were identified. The SEM/EDS analysis of fibers collected from the air duct filters correlated very well with the defect shape and the EDS profile collected from under the defect site. It appears that the fibers from air duct filters directly...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047840
EISBN: 978-1-62708-223-5
.... The fracture progressed into the threaded section and formed a pyramid-shape fragment after it was initiated at approximately 45 deg through the hole in the square end. An irregular zone of untempered martensite with cracks radiating from the surface of the hole (result of melting around hole) was revealed...
Image
Published: 01 June 2019
Fig. 5 A metal particle in the 1977 deposit. The steel appears to be an alloy steel and the shape of the porosity demonstrates that this particle formed directly from liquid steel, e.g., from weld spatter or in thermal cutting. More
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... in terms of the abrasive size, the nature of contact, and the environmental factors. Figure 3 shows in schematic form the four classifications. All of these mechanisms are similar in that a hard particle moves across the component surface in some manner. Particle type, shape, size, and hardness...
Image
Published: 01 December 2019
Fig. 8 SEM micrograph showing cracked region containing spherically shaped contamination particle More
Image
Published: 01 June 2019
Fig. 12 SEMs with EDS analysis showing the severe corrosion at ID of the Stage 3 tube. (a) Note the irregular shape of the corrosion products and loose/porous scale. (b) Note the embedded ash/silica particles. More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... in terms of the abrasive size, the nature of contact, and the environmental factors. Figure 3 shows in schematic form the four classifications. All of these mechanisms are similar in that a hard particle moves across the component surface in some manner. Particle type, shape, size, and hardness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001557
EISBN: 978-1-62708-234-1
... Abstract A number of machined end frame steel forgings made of Cr-Si-Mn alloy showed tiny cracks during magnetic particle inspection after heat treatment. The cracks were mostly confined to base edges and fillet radius. No significant abnormality was observed in chemical composition...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001289
EISBN: 978-1-62708-215-0
.... Subsurface cracks were found to be zigzag and discontinuous as well as intergranular in nature. A mixed mode of fracture involving ductile and brittle flat facets was observed. Micropores and rod-shaped manganese sulfide inclusions were also noted. The material had a hydrogen content of 22 ppm, and cracking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... metal particles in the 1979 deposit. Optical micrographs of the deposits are shown in Figures 2 and 3 . The metal particles were not all of the same material and most showed evidence of having formed into their present shape by solidification from the molten state. Evidence of this is shown...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... present [ 6 ]. Important particle characteristics include size, shape, hardness, and mass. The resemblance between cavitation and erosion damage in shape is remarkable. The pits morphology in erosion corrosion is a horseshoe shape with rough surface, also the pits section looks like a crater. Whereas...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... overhauled 167 h prior to the incident. Pertinent Specifications The spiral bevel gear was manufactured from a “donut-shaped” forging made from consumable electrode vacuum are remelted AMS 6260 steel, which is very similar to AISI 9310 steel. The gear was carburized to provide a case depth of 0.89...