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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089676
EISBN: 978-1-62708-224-2
... produce a magnetic skin. Further examination of the magnetic properties of the link was performed with the aid of a Tinsley thickness gage, which is normally used for measuring the thickness of nonmagnetic coatings on ferritic steel surfaces. With this instrument, a completely nonmagnetic substance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
... applications require high coercivity and a very fine particle size. Because of better magnetic properties, better defined magnetization reversal and higher densities thin film coatings are preferred over particulate ones. Failure analyses of hard drives with particulate media show that the usual mechanism...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001033
EISBN: 978-1-62708-214-3
... from fatigue failure of the regenerator screens. Debris found in the engine was identified as fragments of the regenerator screens. The magnetic properties of the debris were explained by the presence of strain-induced martensite, a bcc phase (identified by X-ray diffraction) at the cold-worked...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001042
EISBN: 978-1-62708-214-3
... with the rail, supplying the electrical energy for propulsion. Fractography clearly established that failure occurred by fatigue—specifically, a low-cycle, reversed bending fatigue mode. The slight magnetic properties of the austenitic stainless steel indicated that a high degree of cold working had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047860
EISBN: 978-1-62708-218-1
... Abstract The 1040 steel crankshaft in a reciprocating engine cracked within one year of operation. The journals of the main and crankpin bearings were inspected by the magnetic-particle method. Three to six indications of 1.5 to 9.5 mm long discontinuities were observed in at least four...
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) NR, no requirement Fig. 3 Carburized zone. 2% nital etch. 47.5× Fig. 4 Martensitic matrix structure of shaft. 2% nital etch. 47.5× Fig. 1 Keyway in drive shaft, as received Fig. 2 Keyway after magnetic examination. A crack is visible as a line in the bottom...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0047328
EISBN: 978-1-62708-231-0
... Abstract Cracks formed on cylinder inserts from a water-cooled locomotive diesel engine, on the water side in the neck between the cylindrical part and the collar. Cracks were revealed by magnetic-particle inspection. As a rule, several parallel cracks had appeared, some of which were very fine...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006931
EISBN: 978-1-62708-395-9
... ), melt temperature ( T m ), molecular weight, and polymer properties. Source: Ref 13 Fig. 19 Variation of glass transition temperature ( T g ) with cure time and temperature. Source: Ref 25 Fig. 13 Nuclear magnetic resonance spectra of polypropylene. (a) Isotactic, (b...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001289
EISBN: 978-1-62708-215-0
... plating. Several tiny cracklike indications, primarily in the base fillet radial zones, were detected by magnetic-particle testing. Abstract The repeated occurrence of random cracks in the fillet radius portion of low-alloy steel (38KhA) end frame forgings following heat treatment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
... Leading to Failure Testing Procedure and Results Nondestructive Evaluation Magnetic Particle and Ultrasonic Inspection Finite-Element and Fracture Mechanics Analyses Mechanical Properties Surface Examination Scanning Electron Microscopy/Fractography Condition Assessment...
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
... 0.68 0.4 to 0.7 P 0.015 0.007 0.025 Si 0.21 0.27 0.2 to 0.35 S 0.01 0.006 0.04 C 0.39 0.43 0.38 to 0.43 Fig. 1 Bolt which failed magnetic particle inspection Fig. 3 SEM of Zone 1 showing intergranular fracture surface with a covering of black oxide. 1000...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001557
EISBN: 978-1-62708-234-1
... Abstract A number of machined end frame steel forgings made of Cr-Si-Mn alloy showed tiny cracks during magnetic particle inspection after heat treatment. The cracks were mostly confined to base edges and fillet radius. No significant abnormality was observed in chemical composition...
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
... Fig. 9 Effect of flaw size on integrated fatigue life Fig. 8 Effect of flaw depth on cyclic stress intensity Fig. 1 Schematic of steering arm Fig. 2 Fractured steering arm Fig. 3 Magnetic particle indications of oxide scale forged into the steering arm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001496
EISBN: 978-1-62708-231-0
..., developing from the final depth of the two mounting-bolt holes. Visual Examination Identifying Markings Identifying markings are to be interpreted first. (No part numbers are listed or shown in photographs here, since part numbers are the property of a customer and in some instances might identify...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001299
EISBN: 978-1-62708-215-0
... of bending and torsional stresses. SEM examination revealed that the fracture origin was a subsurface defect-a hard refractory (Al2O3) inclusion—in the zone close to the pin radius. Chemical analysis showed the crankshaft material to be of inferior quality. It was recommended that magnetic particle...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001113
EISBN: 978-1-62708-214-3
... cracking. Proper nondestructive testing techniques for magnetic particle and radiographic inspection of the plate-weld gusset areas were recommended. Selected References Selected References • Failures Related to Welding , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001072
EISBN: 978-1-62708-214-3
... 10.31399/asm.hb.v11.a0003553 Mechanical Properties Hardness Conclusion and Recommendations Most Probable Cause Remedial Action Background Applications Specimen Selection Testing Procedure and Results Nondestructive Evaluation Magnetic Particle Testing Crack Origin...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... of the header where peak temperatures were believed to have been reached. The long-term mechanical properties of the service-exposed base metal and creep-damaged weld metal were determined by creep testing. Based on the utility's decision to replace the header within one to three years, an isostress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001355
EISBN: 978-1-62708-215-0
... Fractography Metallography Microstructural Analysis Mechanical Properties Hardness Discussion Conclusion and Recommendations The crack initiated at small pits in the first notch of the fir tree. The pits were caused by chloride attack; the crack then propagated by fatigue or corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
... roughened in some areas, as shown in Fig. 1 . Original machining marks were not as visible on the afterface as they were on other surfaces of the flange. The flange, which had six bolt holes in it, was examined on all surfaces by fluorescent magnetic-particle examination. Linear indications, which proved...