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particle morphology

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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.med.c0048421
EISBN: 978-1-62708-226-6
.... No morphological signs of corrosion were observed in connection with fretting structures. Surgical implants Wear particles Titanium Fretting wear Figure 1(a) shows a portion of a titanium screw head with a lip of material that was transported by fretting at a plate-hole edge. A flat fretting zone...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001319
EISBN: 978-1-62708-215-0
... marks were observed, indicating contamination by rusted carbon steel particles. Liquid penetrant testing was used to determine the extent of the cracks, and in situ metallographic analysis was performed over the cracked region. The morphology of the cracks was indicative of transgranular stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0049796
EISBN: 978-1-62708-235-8
... by electrical heating of the bridgewire. Evidence of severe corrosion was revealed on examination of the nickel-chromium-iron alloy bridgewire and the nickel-iron alloy pins. Metallic elements in the pin or bridgewire and substantial amounts of chlorine were detected from the x-ray spectra. Morphological...
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
.... Samples from critical areas of the pump were examined using optical and scanning electron microscopy, electrochemical analysis, and tensile testing. Based on microstructure and morphology, estimated corrosion rates, and particle concentrations in the feedwater, it was concluded that cavitation and erosion...
Image
Published: 01 January 2002
a combination of morphologies of ductile microvoid coalescence of the matrix and brittle cleavage and intergranular separation through and around second-phase particles. Courtesy of Howard Nelson ( Ref 2 ) More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001833
EISBN: 978-1-62708-241-9
.... The grain boundary carbides frequently develop a chain or semicontinuous distribution ( Fig. 5 ). However, in spite of the service-induced segregation and particle formation, the material still retained significant toughness and was suitable for continued service. Fig. 3 Morphology of the impact...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001362
EISBN: 978-1-62708-215-0
... Evaluation Magnetic Particle The disc surfaces were examined using the dry magnetic particle techniques. Multiple cracks, oriented in the radial direction on the sides of the disc, were observed. Figure 2 shows a closeup view of this damage. Fig. 2 This photomacrograph shows a close-up view...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001061
EISBN: 978-1-62708-214-3
... in the welds and heat-affected zones (HAZs). Fracture/crack morphology was brittle and primarily intergranular and deposits at crack tips were primarily iron oxides with significant amounts of sodium compounds. On these bases, the cracking was characterized as intergranular stress-corrosion cracking (IGSCC...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001535
EISBN: 978-1-62708-232-7
... morphology and distribution in a typical field of the failed roll are shown in Fig. 10 at 2000×. The secondary electron (SE) image in Fig. 10 shows a chain-like carbide segregation with a relatively large triangular particle. Numerous fine globular carbides are found dispersed throughout the tempered...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001771
EISBN: 978-1-62708-241-9
..., whereas the grain boundaries contain lamellar layers of chromium carbide. This microstructure is suitable for creep resistance [ 8 ]. Fig. 3 ( a ) Optical microstructure of unused tube shows equiaxed grain and lamellar carbide in grain boundary. ( b ) SEM image reveal grain boundary morphology. ( c...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001364
EISBN: 978-1-62708-215-0
... surface morphology of the impeller fragments suggested that the aluminum had melted and resolidified. The deposits were similar in composition and were identified by XRD as consisting primarily of aluminum trifluoride. In addition, EDS analysis detected major amounts of chlorine and iron. Results...
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
... characteristics of two types of fracture morphologies, intergranular fracture and transgranular microvoid coalescence, indicative of a mixed mode [ 6 ]. Intergranular cracking and cleaved intermetallic particles are brittle fracture in nature, as opposed to the dimpled cellular regions of ductile fracture...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
... and the morphology of the base plate surface. The typical microstructure of the impellers is shown in Fig. 3 . It consisted of alpha dendrites, showing segregation, randomly dispersed lead particles, and shrinkage voids. This microstructure was characteristic of copper alloy C83600, except for the excessive...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... in the 6 years following its installation. Investigation Examination of the leak area disclosed a hole approximately 16 mm (0.6 in.) long and 5 mm (0.2 in.) wide. Further visual inspection, ultrasonic examination, and magnetic-particle examination of that closure weld, as well as others on similar...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
... stands of a HSM. The study pertains to an integrated steel plant under the Steel Authority of India Limited, where large variations in HSM work roll life were observed even under similar mill operating environment. The paper discusses microstructural aspects such as graphite morphology and content...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001379
EISBN: 978-1-62708-215-0
... inventory and the field were tested by magnetic particle inspection. One inventory bolt failed because of a transverse crack near the head-to-shank radius. It was deduced that either a 100% magnetic particle inspection had not been conducted during bolt manufacturing, or the crack went undetected during...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... of precipitation-strengthened type, including the Cu-Ni-Si alloys. The precipitates responsible for the strengthening effect have been identified as Ni 2 Si [ 2 , 3 ]. Ni 2 Si particles with lower solubility in a-grains at room temperature significantly improve the strength of such alloys. In this work, cracks...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... cyclings, and erosion processes [ 4 , 7 – 9 ]. It should be noted that the classification of the form of the attack (type I or type II) is primarily based on the morphology of the attack and not the temperature [ 2 ]. Hot Corrosion Type I High-temperature hot corrosion (HTHC) has been known since...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001836
EISBN: 978-1-62708-241-9
... was removed along a crack on the extrados to document the crack morphology using optical microscopy. In addition to cracking, golden-yellow streaks were visible at the extrados, and the composition was examined using scanning electron microscopy with energy dispersive spectroscopy. Based on the results...