Microbiologically influenced stress corrosion cracking responsible for catastrophic failure of cable bolts

Cable-bolt failures due to stress corrosion cracking (SCC) could significantly compromise the sustainability and long-term stability of underground constructions. To fully understand the SCC of cable bolts, a two-step methodology was implemented: (i) long-term cable-bolt coupon tests using mineralogical materials collected from underground mines; and (ii) accelerated full-scale cable-bolt tests using an acidified solution. In the long-term tests, a novel three-point bending coupon was designed. The effects of mineralogical materials on SCC were evaluated under the simulated underground bolting conditions through the application of “corrosion cells”. For accelerated tests, SCC resistance of different type of cable bolts was examined using the new designed tensile-loading apparatus under the periodically increasing strain-rate loading mechanism. It was identified that mineralogical materials and applied stress intensity accelerated the corrosion process of the cable bolts. The number of wires and wire surface conditions in different types of cable bolt directly affected SCC susceptibility. The cable bolts with a greater number of wires provided higher resistance to SCC. The developed experimental methodologies can be applied to study SCC in other reinforcement materials and the results can be used to design optimal support systems in different environmental and geotechnical conditions.

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Steam Turbine Failure at Hinkley Point ‘A’

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1972_186_037_02 ◽

1972 ◽

Vol 186 (1) ◽

pp. 341-377 ◽

Cited By ~ 88

Author(s):

D. Kalderon

Keyword(s):

Fracture Toughness ◽

Brittle Fracture ◽

Stress Field ◽

Stress Corrosion ◽

Steam Turbine ◽

Stress Corrosion Cracking ◽

Temper Embrittlement ◽

Corrosion Cracking ◽

Catastrophic Failure ◽

Turbine Disc

The catastrophic failure of Hinkley Point ‘A’ unit No. 5 in September 1969 was the result of spontaneous brittle fracture of a shrunk-on ***l.p. turbine disc, initiated by stress-corrosion cracking in the crown of a keyway in the disc bore. Stress corrosion cracking of disc bores and keyways was also found on a number of other discs. The discs were made of 3 Cr-Mo steel and complied with normal acceptance standards, but due to temper embrittlement, their fracture toughness was low, and cracks only about 1/16 in deep in the concentrated stress field at the keyway crown were large enough to initiate brittle fracture. Investigation of the cause of the stress-corrosion cracking is being separately reported.

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Investigation of cable bolts for stress corrosion cracking failure

Construction and Building Materials ◽

10.1016/j.conbuildmat.2018.08.066 ◽

2018 ◽

Vol 187 ◽

pp. 1224-1231 ◽

Cited By ~ 14

Author(s):

Saisai Wu ◽

Honghao Chen ◽

Hamed Lamei Ramandi ◽

Paul C. Hagan ◽

Bruce Hebblewhite ◽

...

Keyword(s):

Stress Corrosion ◽

Stress Corrosion Cracking ◽

Corrosion Cracking ◽

Cable Bolts

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Laser Ultrasonics for Remote Detection of Stress Corrosion Cracking in Harsh Environments

ASNT 27th Annual Research Sumposium Proceedings ◽

10.32548/rs.2018.014 ◽

2018 ◽

Author(s):

Mostafa Hasanian ◽

◽

Sungho Choi ◽

Cliff Lissenden

Keyword(s):

Stress Corrosion ◽

Stress Corrosion Cracking ◽

Corrosion Cracking ◽

Laser Ultrasonics ◽

Remote Detection ◽

Harsh Environments ◽

Detection Of Stress

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Influence of thermal treatment on the stress corrosion cracking of Alloy 600 in Na2S4O6 solution

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2014.52.8.615 ◽

2014 ◽

Vol 52 (8) ◽

pp. 615-622 ◽

Cited By ~ 1

Author(s):

Young Sik Kim ◽

Roun Lee

Keyword(s):

Thermal Treatment ◽

Stress Corrosion ◽

Stress Corrosion Cracking ◽

Corrosion Cracking ◽

Alloy 600

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AMBRONZE 413

Alloy Digest ◽

10.31399/asm.ad.cu0201 ◽

1969 ◽

Vol 18 (6) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Surface Treatment ◽

Stress Corrosion ◽

Tensile Properties ◽

Stress Corrosion Cracking ◽

Electrical Contact ◽

Heat Treating ◽

Corrosion Cracking ◽

Tin Bronze

Abstract AMBRONZE 413 is a copper-tin bronze recommended for plater's plates and electrical contact springs. It is relatively immune to stress-corrosion cracking. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-201. Producer or source: Anaconda American Brass Company.

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NICROFER 5716 HMoW

Alloy Digest ◽

10.31399/asm.ad.ni0324 ◽

1985 ◽

Vol 34 (11) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Stress Corrosion ◽

Tensile Properties ◽

Stress Corrosion Cracking ◽

Crevice Corrosion ◽

Corrosion Cracking ◽

Low Carbon ◽

Nickel Chromium ◽

Corrosion Pitting

Abstract NICROFER 5716 HMoW is a nickel-chromium-molybdenum alloy with tungsten and extremely low carbon and silicon contents. It has excellent resistance to crevice corrosion, pitting and stress-corrosion cracking. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, machining, and joining. Filing Code: Ni-324. Producer or source: Vereingte Deutsche Metallwerke AG.

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