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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0046388
EISBN: 978-1-62708-224-2
... Abstract The bolt in a bolt and thimble assembly used to connect a wire rope to a crane hanger bracket was worn excessively. Two worn bolts, one new bolt, and a new thimble were examined. Specifications required the bolts to be made of 4140 steel heat treated to a hardness of 277 to 321 HRB...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048052
EISBN: 978-1-62708-224-2
... occurred in links having hardness values in the range of 375 to 444 HRB. It was revealed by the supplier that the previous hardness level of 302 to 375 HRB was increased to minimize wear which made the links were made notch sensitive and resulted in fractures that initiated at the butt-weld flash...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001207
EISBN: 978-1-62708-235-8
... Abstract Pipes made of low-carbon Thomas steel had been welded longitudinally employing the carbon-arc process with bare electrode wire made for argon-shielded arc welding. Difficulties were encountered during the cutting of threads because of the presence of hard spots. Microstructural...
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Published: 01 June 2019
Fig. 5 Map of hardness of outside surface of piece 5-1-D, compiled from hardness measurements using Rockwell hardness tests (subsequently, converted to Knoop hardness) and Knoop hardness measurements. More
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Published: 01 June 2019
Fig. 5 Hardness course under roll face. More
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Published: 01 June 2019
Fig. 2 top: hardness (HV 10) along the blade axis (1:3.6), centre and bottom: hardness measured at the bolts with or without cracks on a quadratic grid (1:1). More
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Published: 01 June 2019
Fig. 10 Hardness variation of the nuggets More
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Published: 01 June 2019
Fig. 7 Hardness distribution from periphery to core on transverse sections of non-worn areas of gears 1 and 2 and of the unused gear 3. More
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Published: 01 June 2019
Fig. 3 Case hardness traverse of section used for Fig. 2 taken from tooth pictured in Fig. 1 . Results are self-explanatory. More
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Published: 01 June 2019
Fig. 5 Hardness curve for wall in cylindrical and flattened region. More
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Published: 01 June 2019
Fig. 1 The distance hardness is depicted for Grade 4130 steel at maximum, midrange, and minimum composition levels. This comparison is for Grain Size 7 only. More
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Published: 01 June 2019
Fig. 3 The distance hardness and approximate tensile strength equivalents that can result from composition and grain size extremes More
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Published: 01 June 2019
Fig. 10 (Left) Hardness profile of another turbine blade from the same row in the same engine varying as a function of sampling location along the blade airfoil. More
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Published: 01 June 2019
Fig. 7 Hardness values near the weld seam. More
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Published: 01 June 2019
Fig. 7 Hardness distribution across joints seen in Figs. 2 & 3 . More
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Published: 01 June 2019
Fig. 2 Rockwell “B” hardness profiles for two ring sections. More
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Published: 01 June 2019
Fig. 18 A trace of hardness measurements across the beam area compared with the hardness in the initial PH condition 1 More
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Published: 01 June 2019
Fig. 2 Case hardness traverse used to diagnose the problem of the hypoid pinion shown in Fig. 1 . More
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Published: 01 June 2019
Fig. 3 The relationship between hardness and toughness of 17-4 PH is almost linear. More
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Published: 01 June 2019
Fig. 1 4137 steel bolts (hardness: 42 HRC) that failed by hydrogen-assisted SCC caused by acidic chlorides from a leaking polymer solution. (a) Overall view of failed bolts. (b) Longitudinal section through one of the failed bolts in (a) showing multiple, branched hydrogen-assisted stress More