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macrostructure

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Published: 01 June 2019
Fig. 7 Macrostructure of the forging after Stage 1, showing the concentration of inclusions More
Image
Published: 30 August 2021
Fig. 52 Macrostructure showing a number of pitlike locations on the inner surface of the tube More
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Published: 01 June 2019
Fig. 3 Macrostructure of shaft × 3 More
Image
Published: 01 December 2019
Fig. 3 ( a ) Macrostructure at the cross-section of the blow pipe at bulged out zone, ( b ) microstructural examination under optical microscope at the cross-section of the specimen from bulged out zone, ( c ) inner surface of the specimen showing grain boundary oxidation, decarburization More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
.... The macrostructure and microstructure of spall cavities are described, along with some aspects of the numerous specifications for striking/struck tools. The article also describes the availability of spall-resistant metals and the safety aspects of striking/struck tools in railway applications. fractography...
Image
Published: 01 June 2019
Fig. 3 Macrostructural view of the longitudinal weld for boat sample 12. More
Image
Published: 01 June 2019
Fig. 6 Micrographs showing the nonmetallic inclusions in the forging preforms: (a) macrostructure of the Stage 1 preform; (b) BSE micrograph of shank portion macrostructure More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001615
EISBN: 978-1-62708-235-8
... showing the lateral crack The first stage forgings and undeformed shank/raw bar stock were cleaned properly and prepared for macrostructure examination. The macrostructure of the first stage forging contained numerous oxide (globular) and sulfide (elongated) inclusions in the central portion ( Fig...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... Twenty samples were selected randomly from a failed crusher jaw for chemical analysis, mechanical testing, and microstructural analysis. Another sample along the fracture surface was also selected for macrostructural analysis. Chemical Analysis The elemental compositions of the failed sample...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001193
EISBN: 978-1-62708-229-7
...:3.6), centre and bottom: hardness measured at the bolts with or without cracks on a quadratic grid (1:1). Etching revealed that the region of greater hardness possessed a different macrostructure from the normal regions of the blade. This different macrostructure appeared round all the bolts...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0047406
EISBN: 978-1-62708-232-7
... to reveal the macrostructure. The surface hardening did not extend to the tooth root, leaving this highly stressed area with a low-strength annealed structure. Microscopic examination of the hardened surface area confirmed that it had a quenched-and-tempered structure. Conclusions The pinion teeth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001394
EISBN: 978-1-62708-234-1
.... It was evident, therefore, that the particular mode of failure was related to the inherent structure of the material. Fig. 3 Macrostructure of shaft × 3 Subsequent microscopical examination confirmed the generally intergranular mode of failure. This is illustrated in the photomicrograph Fig. 4...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001850
EISBN: 978-1-62708-241-9
... microscope (LEICA DMRX). The specimens were mounted with resin, ground and polished using standard metallographic technique. The polished specimens were etched with 2% Nital solution to reveal the microstructures. The macrostructure at the crosssection of the specimen BZ is shown in Fig. 3a which revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089676
EISBN: 978-1-62708-224-2
... a segregated structure of complex carbides (black needlelike phase), (FeMn) 3 C carbides (white-on-white area), and pearlite (gray areas) in an austenite matrix, which accounts for the macrostructure shown in Fig. 1(b) . Figure 1(b) is a macrograph of a polished and nital-etched specimen from the link...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047080
EISBN: 978-1-62708-235-8
... in the inner surface. Macroetching revealed that the structure of the tubes had recrystallized in heat treatment. The macrostructure of the straight sections was uniformly fine grained. In the bends, there were exceedingly large grains, in some cases adjacent to very small grains. The size of the very...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... of the visible crack where UT had indicated there was subsurface cracking. Analysis of samples 11, 12 and 13 removed near the failure site established that the leak was the result of advanced stress-rupture cracking in the weld metal. Figure 3 shows the macrostructure of the three-bead width...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001450
EISBN: 978-1-62708-231-0
... to receipt by the boiler-makers was rejected. From the macrostructure of the rivets it was evident that they had been made by the usual process of upsetting the heads from bar stock. It was most unlikely that the bars had been supplied in the gassed condition, but even if they had, then the defects...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
.... It will be observed from the photograph Figure 2 that the macrostructure of the bar and arm materials is markedly different. Microscopical examination showed the arm to have been cut from a plate with a pronounced banded structure. The surface depicted in the illustration was cut more-or-less parallel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001684
EISBN: 978-1-62708-225-9
... Microstructure of the brass nut. Fig. 3 shows that the shaft is held onto the valve seat by the nut by contact with a tip having a different macrostructure. The interface between these two regions is shown in Fig. 6 . It appears that the tip (ring) was welded onto the end of the shaft...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001292
EISBN: 978-1-62708-215-0
... a number of features. The macrostructure of the arm was typical of a forged high-strength aluminum alloy ( Fig. 4 ). The forging operation had produced a U-shape flow pattern in this area, with the bottom of the U facing the outer face of the arm. The path of the initial cracking was closely related...