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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001245
EISBN: 978-1-62708-232-7
... Abstract A working roll of 210 mm diam and 500 mm face length was examined because of shell-shaped fractures. The roll consisted of Fe-0.83C-1.6Cr steel. The chromium content was low for a roll of this diam. The crack origin was located about 10 mm under the roil face. Surface hardness (HV1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047059
EISBN: 978-1-62708-217-4
... Abstract The governor on an aircraft engine failed and upon disassembly of the unit, it was discovered that the retainer for the flyweight pivot pins was broken. The channel-shaped retainer was made of 0.8 mm (0.030 in.) thick 1018 or 1020 steel. The part was plated with copper, which acted...
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Published: 30 August 2021
Fig. 9 (a) Barrel-shaped and (b) hourglass-shaped journals. These types of journals can penetrate the oil film and result in bearing failure because of increased loading in localized areas. More
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Published: 01 June 2019
Fig. 4 The irregular shape of this pore indicates that it may be due in part to entrained air or turbulence in the die. The crack at the arrow may be indicative of a mild form of shrinkage. More
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Published: 01 June 2019
Fig. 5 The irregular shape of the largest pore here is typical of entrained air porosity. More
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Published: 01 June 2019
Fig. 6 Grain Morphology of Fusion Zone Indicating Teardrop-Shaped Weld Pool (a) and Schematic of Moving Weld Pool (b) [ 2 ]. More
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Published: 01 June 2019
Fig. 6 Form (shape) factors of isolated delta ferrite in the cladding of the Midland control specimens. More
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Published: 01 June 2019
Fig. 8 Cross-section through an unusually large teardrop shaped pit Same etch as Fig. 7 — original magnification was 8× More
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Published: 01 June 2019
Fig. 3 Macrograph of fractured shaft. Note the elliptical shape of the propagating fatigue crack. The scale markings are 0.1 in. More
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Published: 01 June 2019
Fig. 9 a. In the unaffected part. Change of shape and distribution of the manganese sulfide inclusions as the weld seam is approached, longitudinal polished section, unetched. 500 × b). In the proximity of the weld seam. Change of shape and distribution of the manganese sulfide inclusions More
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Published: 01 June 2019
Fig. 14 Enlarged view of fracture surface B. Arrow points to apex of V-shaped surface pattern, suggestive of point of origin of fracture. S3–S5, locations of SEM micrographs ( Fig. 23 , 24 , 25 ) More
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Published: 01 June 2019
Fig. 24 Micrograph S4 ( Fig. 14 ); features at apex of V-shaped pattern observed on fracture surface. Primarily intergranular fracture/cracking associated with presence of nonmetallic deposit. (a) 30 ×. (b) 150 × More
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Published: 01 June 2019
Fig. 1 Micrograph of large bacteria (SRB) that are rod shaped. Note this is a chain of two bacteria cultured from microbiologically induced corrosion product of the pipe failure shown in Fig. 12. 400×. Courtesy of MDE Engineers, Inc. More
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Published: 01 June 2019
Fig. 7 Rod-shaped sulphide inclusions under SEM examination, at × 450 More
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Published: 01 June 2019
Fig. 2 Cracks in the back wall of impeller II following the shape of the blades. 2 3 × More
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Published: 01 June 2019
Fig. 2 View on Fracture. (Note crescent shaped lip at top right.) More
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Published: 01 June 2019
Fig. 4 Crack (a) and broken-open fracture surface (b) of failed wedge-shaped middle tapered ring. 6× More
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Published: 01 June 2019
Fig. 6 Significant volume fraction of manganese sulfide inclusions in wedge-shaped tapered ring microstructure. 73× More
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Published: 01 June 2019
Fig. 2 Inclusion shape near crack initiation site More
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Published: 01 June 2019
Fig. 2 Shape of the blade and detail of the corner More