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Surface defects

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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
... above the plating line were blown into the plating tank and getting co-deposited. The paper describes the step-by-step analysis of the defect that led to successful identification of the root cause of the defect. Coatings Defect analysis Fibers 5086 UNS A95086 Ni-11P Surface treatment...
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Published: 01 June 2019
Fig. 5 Surface defects with fatigue fractures, transverse section, unetched. 500 × More
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Published: 01 June 2019
Fig. 6 Surface defects with fatigue fractures, transverse section, unetched. 500 × More
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Published: 01 December 1992
Fig. 2 SEM micrographs of surface defects on sample SEM 1. (a) Intersection of pores with surface and dendritic structure.(b)Higher-magnification view of dendrites. More
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Published: 01 December 1992
Fig. 3 SEM micrographs of surface defects on sample SEM 1. (a) Over view of defect that intersects surface A. The dendritic structure is typical of shrinkage porosity. Note tear Edges and beach marks that appear to emanate from this defect. (b) Higher-magnification view of the fracture surface More
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Published: 01 December 1992
Fig. 4 SEM micrographs of sample SEM 2. (a) Overview of the surface defects in group 2. The vertical lines are grinding marks. (b) Higher-magnification view of the dendritic structure af the pore indicated by the arrow in (a).The dendrites are slightly masked by a corrosion product. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048128
EISBN: 978-1-62708-225-9
... by careful examination. A hard material (mill scale) was assumed to have been impressed during drawing of the wire and was broken out during peening, leaving the depressions with sharp-bottomed corners. Spring was concluded to have failed due to a surface defect. Scale (corrosion) Wire drawing Spring...
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Published: 01 December 1992
Fig. 8 SEM micrographs of the surface of spring 2, showing surfaced defects caused by poor drawing practice. (a) 120×. (b) 113×. More
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Published: 01 January 2002
Fig. 16 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o'clock position. (b) At the 9 o'clock position, with arrow indicating a surface defect. (c) At the 6 o'clock position. All approximately 0.2× More
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Published: 30 August 2021
Fig. 4 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o’clock position. (b) At the 9 o’clock position, with arrow indicating a surface defect. (c) At the 6 o’clock position. Original magnification of all: 0.2× More
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Published: 01 June 2019
Fig. 1 Close-up views of surface casting defects on a paper-drier head. (a) At the 12 o'clock position. (b) At the 9 o'clock position, with arrow indicating a surface defect. (c) At the 6 o'clock position. All approximately 0.2x More
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Published: 01 June 2019
Fig. 7 Surface defect adjacent to weld. (×5). More
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Published: 01 June 2019
Fig. 4 Surface defect, transverse section, unetched. 500 × More
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Published: 01 June 2019
Fig. 7 Geometry of notch machined into tensile specimen to simulate surface defect. More
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Published: 30 August 2021
Fig. 105 Closeup of fracture-surface defect. Arrows indicate spherical inclusions. Original magnification: 300× More
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Published: 01 June 2019
Fig. 1 Defects on Internal Surface of Steam Pipe. (× 1 2 ). More
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Published: 01 December 2019
Fig. 3 Defects observed on the concentric pipe surface: ( a ) crack initiated at the weld; ( b ) window-type failure with complete detachment of a piece of the pipe More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001158
EISBN: 978-1-62708-225-9
... defects and was of high purity, although a number of minor surface defects such as rolling laps were found. The spring was heat treated and its surface strengthened by shot-peening, but the surface was also decarburized to a depth of approximately 0.03 mm which resulted in a lowering of the surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046210
EISBN: 978-1-62708-235-8
... drilling, giving rise to surface defects. The fracture surface was characteristic of fatigue in that it was flat, relatively shiny, and exhibited beach marks. The crack surface was at a 45 deg angle to the axis of the shaft, indicating dominant tensile stresses. The material was the French designation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047076
EISBN: 978-1-62708-217-4
... electron microscope fractographs, hardness testing, and electrical conductivity testing) supported the conclusions that the failure was caused by fatigue cracks originating on the inside curved surface of the flanges. The cracks had initiated in surface defects caused by either corrosion pitting or forming...