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pearlite banding

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089459
EISBN: 978-1-62708-235-8
... structure of an unused rod examined for comparison; this structure contains equal amounts of ferrite (light) and pearlite (dark). (d) Unsatisfactory structure of the fractured rod, which contains alternating bands of ferrite and pearlite. The broken connecting end of a forged medium-carbon steel rod...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089338
EISBN: 978-1-62708-224-2
... and pearlite microstructure was revealed by etching. It was also observed that the fracture is primarily along the inclusions and through bands of ferrite. It was concluded that the lifting eye failed as a result of overload. Fracture occurred parallel to the rolling direction, through manganese-sulfide...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0045903
EISBN: 978-1-62708-223-5
..., and metallographic examination revealed a basic microstructure of pearlite and ferrite with bands of slightly finer pearlite, with a large concentration of inclusion stringers in the area of the fracture origin. Further investigation using an energy-dispersive x-ray analyzer showed high concentrations of sulfur...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... value, which corresponds to approximately 5 μm. This value is small enough for the material to show, under the proper conditions of temperature and strain rate, superplastic behavior. It is also evident from Fig. 6 that the hot rolling direction (horizontal axis) produces ferrite and pearlite bands...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001592
EISBN: 978-1-62708-228-0
... presents a weaker resistance to corrosion affecting the rod life. Non-metallic inclusions are a pitting preferential site leading to fatigue crack initiation. Heterogeneous microstructure as banded martensite and ferrite/pearlite decreases the ductility of the material affecting the fatigue propagation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001490
EISBN: 978-1-62708-232-7
... on an axisymmetric ring in which this thickness change occurred around the dome. The microstructure of the steel also varied between point C and E. At D, midway between C and E, microstructure of the pot was a ferrite-pearlite mixture that was intermixed banded and large equiaxed ferrite and pearlite, Figure 11...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001709
EISBN: 978-1-62708-229-7
... feature to be reported also is that the cracks were only found on the half of the tube facing the inside of boiler, while no cracks were observed on the other half of the tube facing the outside of the boiler. Optical microscopic examination of the base metal revealed a ferrite-pearlite banded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001603
EISBN: 978-1-62708-228-0
.... The pearlite content was significantly less in the ferrite band compared to the HAZ and PM. Distinct flow line contours were observed on both sides of the fusion line; however, flow line contours on one side of the crack appeared to be sharper, indicating nonuniform normalizing across the fusion line...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... to insure that all material leaving meets specifications. Fig. 1 represents a typical banded microstructure. The area here was found to contain 100% pearlite and was coarse grained with a grain size of #1. A fine grained microstructure is what ASTM specifies for this particular grade of structural...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001646
EISBN: 978-1-62708-219-8
... martensite showed deformed pearlite typical of drawn wires. Micrographs showing surface martensite and underlying deformed pearlitic structure in the transverse sections of three different broken wire samples are shown in Fig. 2 . It can be clearly observed from these micrographs that, while the band...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... and pearlite have formed along the rolling direction. The relationship between increasing percentages of reduction by hot rolling and the intensity of banding in type 430 stainless steel is demonstrated by Fig. 5 . Fig. 3 Longitudinal section through a hot-rolled 1041 steel bar showing a carbon-rich...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001337
EISBN: 978-1-62708-215-0
... of creep cracking and creep void formation at the fissure. A nearly continuous band of graphite nodules was observed on the surface of the fissure. In addition to the graphite band formation, the microstructure near the failure exhibited carbide spheroidization from long-term overheating in all the tube...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001720
EISBN: 978-1-62708-227-3
... and pearlite. The carbon content would be estimated to be around 0.2%. The microstructure shows evidence of heavy banding in which the ferrite and pearlite are aligned in “bands” as can especially be seen in Figure 3 . A banded microstructure such as this is typical of plate steels from this time period...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048795
EISBN: 978-1-62708-220-4
..., whereas the plate did not. The structure between the bands (and away from the weld) consisted of ferrite and pearlite with a hardness of 180 to 200 HV (10-kg load). In the bands, the structure was upper bainite with a hardness of 251 to 265 HV. Specimens cut from this area were austenitized at 950 °C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001597
EISBN: 978-1-62708-236-5
.... Transverse sections through the #1, #3, and #5 pins from crank #1 revealed that each had uniform, tempered martensite induction layers with hardness of about 50 HRC at the surface. The core microstructures were primarily ferrite and pearlite, but bands of tempered martensite and MnS inclusions were observed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
... of unresolvable pearlite aligned in bands along the longitudinal direction of the pipe. The pearlite grains occur in lean alloy microsegregation bands where local hardenability is low. The structure, shown in Fig. 5 , is typical of a low alloy hardenable steel in the normalised condition, Fig. 5 Upper...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001768
EISBN: 978-1-62708-241-9
.... The enlarged views of the white-etching layers observed in both sides of the crack are exhibited in Fig. 5a , b at 500× magnifications. Figure 6a , b showed the microstructures near the crack tip at 200× and 500× magnifications, respectively, depicting banded ferrite-pearlite structure typically observed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001276
EISBN: 978-1-62708-215-0
... of pearlite and ferrite. However, the internal surface on the thicker regions of the rings exhibited significant deposit buildup, where the thinned regions showed none. No significant corrosion or pitting was observed on either the internal or external surface of the piping. The lack of internal deposits...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001037
EISBN: 978-1-62708-214-3
... stress raisers at “A” and the rough machining on surface “B.” Metallography Microstructural Analysis The core ( Fig. 3 ) had a banded microstructure of ferrite and pearlite and contained some MnS inclusions. The case ( Fig. 4 ) showed a tempered martensite matrix with a nearly continuous...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001405
EISBN: 978-1-62708-234-1
...Abstract Abstract During microscopic examination of a number of cases of caustic cracking, a certain feature has been recognized that appeared to be associated only with caustic cracking. This was a preferential attack on the carbide envelopes and lamellae of the pearlite grains. Evidence...