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longitudinal and transverse cracks

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001417
EISBN: 978-1-62708-227-3
... in the longitudinal direction. Although the longitudinal crack preceded the transverse ones, it would appear that once initiated, the latter developed at a greater rate than the former. Diesel engines Nonmetallic inclusions Pins Steel Fatigue fracture Very few failures in general are attributable...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0048082
EISBN: 978-1-62708-221-1
... and the shaft proper. The cracks were found to have propagated in the longitudinal and transverse directions until failures occurred. It was showed by a transverse section through the spline that the longitudinal cracks were initiated at the sharp corners at the roots of the spline teeth. The shaft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048835
EISBN: 978-1-62708-220-4
... welded to the base metal and all vessel welds were found to be overlaid with type 309 stainless steel. Long longitudinal cracks in the weld metal, as well as transverse cracks were exposed after the weld overlay was ground off. A decarburized region on either side of the crack was revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048801
EISBN: 978-1-62708-229-7
... with a crack, which ran parallel to the weld seam. Longitudinal and transverse tensile specimens were cut from the pipe, and transverse-to-the-weld specimens were cut from the longitudinal and circumferential welds from the undamaged specimen. All room-temperature tensile properties were within...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001169
EISBN: 978-1-62708-220-4
... conducted on longitudinal and transverse sections showed predominantly transcrystalline cracks, originated from the pits at the external surfaces of the pipe. Their appearance suggested they were stress corrosion cracks that occur in austenitic steels under the combined effect of stresses and certain...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001179
EISBN: 978-1-62708-228-0
... Abstract During natural gas drilling in the EMS region in 1956, considerable numbers of longitudinal cracks and transverse fractures occurred in the connecting pieces of the bore rods. The connectors were screwed onto the rods by means of a fine thread and tightly joined with it by shrinkage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047598
EISBN: 978-1-62708-217-4
... of the welds. The crack surfaces were severely discolored, apparently from gaseous blow-by following failure. There also were additional longitudinal cracks in the HAZs, where partial weld separation had occurred, and transverse cracks formed by bending during failure. Microscopic examination of sections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... the conclusion that the basic failure mechanism was fracture by torsional fatigue, which started at numerous surface shear cracks, both longitudinal and transverse, that developed in the periphery of the root of the shear groove. These shear cracks resulted from high peak loads caused by chatter. The shear...
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Published: 01 June 2019
Fig. 6 Transverse crack in non-fractured galvanized wire, longitudinal section through fissured edge, etch: Picral 100 × 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
... Abstract A steel valve spring meeting Steel-Iron-Test 1570 fractured during the high-stress condition of the operation of its valve. Metallographic examination of a transverse section adjacent to the fracture and a longitudinal section through the crack showed the steel was free of major...
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
... for examination. Transverse sections through this and the mating portion already received, followed by magnetic crack detection, revealed the presence of defective zones. Subsequent ultrasonic examination of other sections of the steam main indicated suspect areas in a number of lengths of pipe. These defects...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... and Results Surface Examination Visual Three fractured pieces ( Fig. 1 ) and part of the tube containing the mating fracture surface were received for failure analysis. Visual examination revealed numerous cracks in both the longitudinal and transverse directions. Fig. 1 As-received...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001780
EISBN: 978-1-62708-241-9
... and potential for failure. An example of MnS inclusions on a longitudinal plane near a corner feature of a component is shown in Fig. 4 . One can already anticipate that easy crack formation might occur if the corner feature was loaded in bending or transverse tension. Since MnS inclusions are not affected...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001800
EISBN: 978-1-62708-241-9
... consistently exhibited a flat fracture transverse to the wire at the spring outer diameter (OD) that extended across half the wire diameter, with the remainder of the fracture approximately parallel to the wire longitudinal direction ( Fig. 1 ). This two zone fracture morphology is typical of fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001825
EISBN: 978-1-62708-241-9
... longitudinal and transverse cracks SEM/EDS fracture surface analysis tensile stress 304 (austenitic wrought stainless steel) UNS S30400 Introduction This paper details the investigation of the failure of a tube from a boiler stack economizer. The economizer was in a boiler at an ethanol plant...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001258
EISBN: 978-1-62708-235-8
... with contiguous wire segments on both sides of the fracture of 300 mm each. Longitudinal and transverse sections were taken through the fracture and at the cut ends from all wire specimens. Figures 1 and 2 reproduce a longitudinal and transverse section of a fracture location. In addition to the fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001218
EISBN: 978-1-62708-234-1
... a welding globule was later discovered at the origin of the fracture. All specimens were investigated metallographically in longitudinal and transverse sections. Figure 7 is a transverse section, showing crevice or contact corrosion on a contact surface of the turns. Fig. 8 shows a longitudinal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001733
EISBN: 978-1-62708-225-9
... compared with drive cable failures using a scanning electron microscope. Figure 2 shows a scanning electron fractograph of a typical drive cable break. It illustrates three fractographic features commonly observed: 1) combined transverse and longitudinal crack growth, 2) shear lip formation, and 3...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001313
EISBN: 978-1-62708-215-0
... at the very end of the tube. Two small transverse cracks were observed within a few millimeters of the end, with one being a through wall crack. This through-wall crack had been covered by the plug during leak testing. Metallography The tube was sectioned into the following pieces: a longitudinal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001230
EISBN: 978-1-62708-236-5
... in crank pin. 1.5× b). Longitudinal crack in crank pin. 10× According to Fig. 2 , a transverse section in the plane A — A showed that the crank pin was surface hardened up to a depth of 2 to 2.5 mm and that the crack had penetrated the pin radially up to a depth of 14 mm ( Fig. 3 ). The otherwise...