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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047428
EISBN: 978-1-62708-235-8
... Abstract A cast dragline bucket tooth failed by fracturing after a short time in service. The tooth was made of medium-carbon low-alloy steel heat treated to a hardness of 555 HRB. The fracture surface was covered with chevron marks. These converged at several sites on the surface of the tooth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0047479
EISBN: 978-1-62708-221-1
... Abstract A cast dragline bucket tooth failed by fracturing after a short time in service. The tooth was made of medium-carbon low-alloy steel heat treated to a hardness of 555 HRB. The fracture surface was covered with chevron marks. These converged at several sites on the surface of the tooth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091761
EISBN: 978-1-62708-229-7
... Abstract Turbine buckets in a 37.5-MW gas turbine made of Udimet 500 superalloy failed in service. The power plant was located 1 km (0.6 miles) from the Pacific Ocean and operated on No. 2 diesel fuel, which was supplied by tanker ship. Turbine bucket failures occurred on three units after 2500...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047423
EISBN: 978-1-62708-236-5
... Abstract A large shackle used in operating a dragline bucket failed in service. The shackle was made of a cast low-alloy steel (similar to AISI 4320) heat treated to a hardness of 415 BN. The shackle failed by fracturing through the load-bearing region. Examination of the fracture surface...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
... Abstract The structural collapse of an iron-ore bucket-wheel stacker reclaimer at the beginning of operation was investigated by means of mechanical tests, microstructural characterization, and computational structural analysis. The mechanical failure was a consequence of a brittle fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... Abstract This article presents a failure analysis of 37.5 mW gas turbine third stage buckets made of Udimet 500 superalloy. The buckets experienced repetitive integral tip shroud fractures assisted by a low temperature (type II) hot corrosion. A detailed analysis was carried out on elements...
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Published: 01 January 2002
Fig. 10 Relation between microstructural elements in a bucket tip shroud and its principal stresses More
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Published: 01 June 2019
Fig. 1 Ultrahigh-strength steel dragline bucket tooth that failed due to environmental hydrogen-assisted cracking. See also Fig. 2 . More
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Published: 01 June 2019
Fig. 1 Ultrahigh-strength steel dragline bucket tooth that failed due to environmental hydrogen-assisted cracking. See also Fig. 2 . More
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Published: 01 June 2019
Fig. 1 The 37.5 mW gas turbine third stage bucket tip shroud fracture More
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Published: 01 June 2019
Fig. 5 Orientation and distribution of the columnar grains at the bucket tip shroud More
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Published: 01 June 2019
Fig. 6 Dendritic appearance of the fracture surface of the third stage bucket More
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Published: 01 June 2019
Fig. 7 Irregular appearance of the fracture surface of the third stage bucket trailing edge zone. The fracture appeared to have followed a transgranular path in this region. More
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Published: 01 June 2019
Fig. 8 Initiation of the crack at the bucket tip shroud. The surface shows a transgranular crack. More
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Published: 01 June 2019
Fig. 10 Original microstructure of the tip shroud zone of the third stage bucket More
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Published: 01 June 2019
Fig. 12 Relation between microstructure elements of the bucket tip shroud and its principal stresses More
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Published: 01 June 2019
Fig. 14 Stress concentration at the bucket tip shroud due to presence of equiaxial and columnar grains More
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Published: 01 June 2019
Fig. 1 Relation between microstructural elements in a bucket tip shroud and its principal stresses More
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Published: 01 December 2019
Fig. 3 Macrograph showing the bucket from the first stage in as-received condition More
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Published: 01 December 2019
Fig. 4 Macrograph showing the hot corrosion cavities found on the SS of the bucket More