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light metals

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Image
Published: 01 June 2019
Fig. 4 At the junction of the heat affected zone and weld metal, the light structure is typical of cast chromium-nickel alloy, and the dark HAZ is martensitic. (See Fig. 3 ) Vilella's etch; magnification 100 times. More
Image
Published: 01 December 1993
Fig. 14 Micrograph of light-colored phase found in the base metal (pipe) next to weld W-19. 30.5× More
Image
Published: 01 December 2019
Fig. 10 Light photomicrograph of the microstructure of unaffected base metal (4% Nital Etchant) More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001530
EISBN: 978-1-62708-225-9
... one failed catastrophically within a few days, generating a huge amount of metallic wear debris and causing pitting on the surface of the cast iron roller. Following the failure, samples were collected from both good and failed bearings. The samples were analyzed chemically and their microstructures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048158
EISBN: 978-1-62708-229-7
... to the axis of the wire were revealed by metallographic examination. A light-gray phase, which had the appearance of liquid-metal corrosion, was observed to have penetrated the grains on the fracture surfaces. The spring wires were found to fracture in a brittle manner characteristic of fracture from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001420
EISBN: 978-1-62708-220-4
... Abstract A hydroextractor installed new for the drying of sugar massecuite consisted of a metal basket fixed to a vertical spindle. Disruption occurred just after the machine had been run up to speed and was not preceded by any abnormal behavior. The basket assembly consisted of a Ni-Cr-Mo...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... Abstract Several cases of embrittlement failure are analyzed, including liquid-metal embrittlement (LME) of an aluminum alloy pipe in a natural gas plant, solid metal-induced embrittlement (SMIE) of a brass valve in an aircraft engine oil cooler, LME of a cadmium-plated steel screw from...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001036
EISBN: 978-1-62708-214-3
... (at the right in Fig. 6 ) was undeformed, but the smaller filament was significantly distended. Thus, it was concluded that the right rear parking light was on at the time of the collision. Apparently, the looseness of the glass/metal seal did not create an air leak large enough to cause filament oxidation...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001369
EISBN: 978-1-62708-215-0
.... A crack is visible as a line in the bottom of the keyway. Light-colored metal buildup is outlined by magnetic ink. Testing Procedure and Results Metallography Sections were cut from the keyway at the chipped area and the light-colored area. The microstructure showed a case-hardened structure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001823
EISBN: 978-1-62708-241-9
.... The microstructure of the steel is obviously different at the feature relative to away from it. Figure 8 is a light photomicrograph near the outer diameter (OD) surface. Region 3 is the unaffected base metal. Region 2 is similar to a heat affected zone (HAZ) of a poor weld with improper cooling. The HAZ is similar...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048068
EISBN: 978-1-62708-224-2
... Abstract A hook on a two-leg chain (each 13 mm diam, included angle 60 deg) failed at the junction of the eye and shank while lifting a 4990 kg load. The diam of the hook at this junction was approximately 22 mm. Light intergranular oxidation at the surface on the side of the hook where...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0047312
EISBN: 978-1-62708-224-2
... was provided regarding the type of metal used to manufacture the hook. A failure analysis was requested to determine the cause of fracture. Fig. 1 Overall view of fractured T-hook. See also Fig. 2 , 3 , 4 , and 5 . 0.35× Investigation Examination by light fractography ( Fig. 2 ) revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046874
EISBN: 978-1-62708-229-7
... subjected to mildly fluctuating stresses. Analysis (visual inspection, 0.3x photographs, 0.7x light fractographs, and metallographic examination) supported the conclusions that the spring failed by corrosion fatigue that resulted from application of a fluctuating load in the presence of a moisture-laden...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001746
EISBN: 978-1-62708-217-4
... tensile stresses. A second factor was a cluster of non-metallic inclusions which had ‘tributary’ cracks starting from them. Also, eyebolts broke when used to lift a light aircraft (about 7000 lb.). The bolt failure was a brittle intergranular fracture, very likely due to a hydrogen-induced delayed failure...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001102
EISBN: 978-1-62708-214-3
... Abstract Four cadmium-plated ASTM A193 grade B studs from a steam line connector associated with a power turbine failed unexpectedly in a nil-ductility manner. Fracture surfaces were covered with a light-colored, lustrous deposit. Optical microscope, SEM, and EDS analyses were conducted...
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
... of the light microscope has restricted its use for such work. Aside from the published light optical fractographs made by Zapffe (see Ref 5 for a review of many of these), very few optical fractographs of metallic materials have been published by others. Microfractography gained momentum with the development...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... with water after hot ejection from the molding temperature. This causes the metal to pull away from the resin, producing shrinkage gaps that promote poor edge retention ( Fig. 2 ) because of the different rates of thermal contraction. Fig. 2 Light micrographs of the surface of a carburized 8620 alloy...
Image
Published: 01 June 2019
cracks in the fusion zone and HAZ. 3x. (b) Fracture origin (top) formed by welding stresses on the contaminated weld metal. The light region below the origin is the rupture that occurred during the proof test. Approximately 5x More
Image
Published: 01 December 1993
Fig. 2 Keyway after magnetic examination. A crack is visible as a line in the bottom of the keyway. Light-colored metal buildup is outlined by magnetic ink. More
Image
Published: 01 January 2002
Fig. 6 Light micrographs of a partially broken and a completely broken specimen of AISI 312 stainless steel weld metal heat treated to transform the delta ferrite to sigma, and a SEM fractograph of the broken Charpy V-notch specimen More