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weld macrostructure

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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
... 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 of the longitudinal seam weld as contained in boat sample 12...
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
... in this locality. 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...
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
.... In the second case the machine was a 200 kW alternator, direct-driven by a diesel engine running at 750 rpm. Both the foregoing failures reveal the same basic weakness, i.e., insufficient rigidity when subjected to variations or reversals of torque. In the first case, the bars welded to the arms were...
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
.... The examination centered on corrosion of the brass components. The seat and shaft were alpha brass, with a hardness of 64 and 79 DPH, respectively. A nut held the shaft onto the seat, and was alpha-beta brass with a hardness of 197 DPH. Welded on the end of the shaft was a ring of hard (DPH 294) alpha-beta brass...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001561
EISBN: 978-1-62708-229-7
...% oxalic acid etch for macrostructural depiction. The weld insert, weld deposit, crack and counterbore area are well defined showing the through wall crack and a smaller non-through wall crack on the weld side of the main crack ( Figure 3 ). The specimen was then repolished and examined after ASTM A-262...
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
..., such as electroplating, heat treatment, machining, or welding. These operations may also introduce possible defects ( Table 1 ) that may be considered in conjunction with possible defects from metalworking. Failures can also occur from a complex series of manufacturing factors. For example, the level of residual hoop...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... be acceptable in some locations. Moreover, many castings (especially iron and steel castings) generally lend themselves to being weld repaired, with proper attention to the details of weld repair procedures. Imperfections and defects can be removed and a suitable weld deposit substituted to give a finished...