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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001005
EISBN: 978-1-62708-215-0
..., and reducing the level of power assistance to the wheels to encourage the driver to put the vehicle in motion prior to turning. Chromium-molybdenum steel - 4135 Chromium-molybdenum steels, mechanical properties Crack initiation Fatigue failure Forging defects Steering arms Stress concentration...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001785
EISBN: 978-1-62708-241-9
... The maintenance facility used 3/4-inch (19 mm) wrenches produced by a single manufacturer which were removed from tool boxes and store stock. The nonfailed wrench population was visually inspected for any obvious defects and none were found. To determine the cause of the failure, 15 wrenches along with the failed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001446
EISBN: 978-1-62708-234-1
... crack, about 2 in. long, developed at the approximate mid-length of the vessel, and allowed slow de-pressurization. Subsequent examination by radiography and ultrasonic means indicated the crack was associated with an irregularly shaped, laminar type of defect located within the wall of the vessel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047165
EISBN: 978-1-62708-217-4
... penetrant inspection, and micrographs with deep etching in aqueous 20% sodium hydroxide) supported the conclusion that failure on both wheel halves was by fatigue caused by a forging defect resulting from abnormal transverse grain flow. The crack in the first wheel half occurred during service...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001422
EISBN: 978-1-62708-229-7
... years. Specimens were prepared for microscopical examination to include the defective zone and a section through a circumferential crack. The defective zone was found to contain numerous inclusions of slag and oxides of globular form. Regions surrounding the inclusions were decarburized, the indications...
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
...Abstract Abstract The paper discusses the analysis of a coating defect on a high phosphorus electroless nickel (Ni-11 wt. % P) deposit plated on an aluminum alloy substrate. Preliminary investigations had indicated that the elongated defects were possibly caused by the entrapment of long fibers...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089651
EISBN: 978-1-62708-235-8
... magnification, and nital etched 300x magnification) supported the conclusion that the rocker levers failed in fatigue, with casting defects, or spiking, acting as stress raisers to initiate failures in highly loaded engine tests. Recommendations included shot peening of the levers as an interim measure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001443
EISBN: 978-1-62708-235-8
...Abstract Abstract Following the fusing of one of the copper leads in the choke circuit of an electric welder, a piece of the affected lead was obtained for examination. The sample had large internal cavities and surface bulges. It is remarkable that a wire containing defects of the magnitude...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
...Abstract Abstract Flow forming technology has emerged as a promising, economical metal forming technology due to its ability to provide high strength, high precision, thin walled tubes with excellent surface finish. This paper presents experimental observations of defects developed during flow...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001909
EISBN: 978-1-62708-235-8
... to the resistance welding parameters resulted in acceptable welds. Bombs (weapons) Bomb fins Welded joints Weld defects Low-carbon steel Joining-related failures Introduction Component: MK#83 and MK#84 general purpose bomb fins Manufacturing defects: Nonpenetrating plug welds Background...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001445
EISBN: 978-1-62708-227-3
... occurred longitudinally through the upper wall over a length of approximately 68 in. The sample received for examination was ultrasonically tested, which indicated a band of internal defects extending 1 in. in from the edge. Subsequently, the portion of the pipe embodying the other side of the rupture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0089543
EISBN: 978-1-62708-226-6
...Abstract Abstract Threads of a bone screw (Co-Cr-Mo alloy, type ASTM F75) had broken off, and other threads had cracked. 15x sectioning showed porosity, and 155x magnification showed gas holes, segregation, and dissolved oxides. This supports the conclusion that manufacturing defects caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.9781627082358
EISBN: 978-1-62708-235-8
Image
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
Image
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
Image
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
Image
Published: 30 August 2021
Fig. 3 Defects in selective-laser-melted (SLM) materials. (a) Porosity formed in SLM Ti-6Al-4V. (b) Balling. (c) Hot tears. Source: Ref 26 More
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Published: 30 August 2021
Fig. 3 Schematic of defects and discontinuities in welded joints More
Image
Published: 30 August 2021
Fig. 8 Types of solderability defects. (a) Nonwetted. (b) Dewetted. Source: Ref 16 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001456
EISBN: 978-1-62708-229-7
...Abstract Abstract An unusual type of defect was discovered during hydraulic testing of a water-tube boiler after repairs to the superheater tubes following erosion from soot-blowers. When the pressure reached 700 psi, slight leakage was found to be taking place from one of the superheater tubes...