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void analysis

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001781
EISBN: 978-1-62708-241-9
... in comparison to a cast A360.0 alloy Yield strength, MPa Ultimate tensile strength, MPa Subject club 180 306 Exemplar club 175 299 A360.0 [ 16 ] 165 317 Void analysis results for the subject and exemplar club hosel Table 3 Void analysis results for the subject and exemplar...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... propagation fractography metals microscale models root-cause failure analysis specimen preparation void coalescence void nucleation THE CONCEPT OF DUCTILE AND BRITTLE BEHAVIOR generally applies to the macroscopic scale. However, there is no universally accepted transition point from ductile...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... to drive the crack further [ 8 ]. EDX analysis proves that these oxides are essentially formed by zinc (Zn), iron (Fe), oxygen (O), and carbon (C) elements ( Table 1 ). On other surfaces, voids and delaminated surface were detected ( Fig. 4a ), especially near fatigue fracture. Felder and Montagut [ 7...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048767
EISBN: 978-1-62708-235-8
..., and 1% hydrocarbons at 40 deg C and 55 kPa during operation. Voids on the fracture surface and evidence of incomplete weld penetration were revealed by examination. Brittle fracture was indicated by the overall appearance through some fatigue beach marks were observed. Very narrow bands of high hardness...
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
.... Microstructural and EDS analysis yielded evidence of overheating, revealing voids, scale, grain boundary oxidation, decarburization, and grain coarsening on the inner surface of the pipe, which also suggest the initiation of creep. Based on the information gathered during the investigation, the blow pipe...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001083
EISBN: 978-1-62708-214-3
... Abstract Copper alloy (C83600) impellers from two different feed pumps that supplied water to a 2-year-old boiler failed repeatedly. Examination by various methods indicated that the failures were caused by sulfide attack that concentrated in shrinkage voids in the castings. Two alternatives...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001365
EISBN: 978-1-62708-215-0
... observed in the damaged impeller. Etched in Vilella's reagent. 31× Fig. 9 Closeup views of a repair weld covering a casting void or shrinkage cavity. Etched in Vilella's reagent. (a) ∼1.09×. (b)∼6.2× Chemical Analysis/Identification Material and Weld A sample of the damaged impeller...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001000
EISBN: 978-1-62708-229-7
.... Fig. 1 Schematic showing where failure occurred in superheated steam transfer line. Metallographic analysis of the material disclosed an advanced stage of creep damage accumulation in the form of local cracks, microcracks and aligned damage centers which show up as voids following upon...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001076
EISBN: 978-1-62708-214-3
... eye. Macrophotography showed that the attack was more severe at one edge of each pad, resulting in deeper grooving and a buildup of deposits, mostly silver sulfides. Microstructural analysis of a cross section indicated that the interface between the silver overlay and the substrate (beryllium copper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001003
EISBN: 978-1-62708-227-3
... flux. The embrittlement was shown to be caused by the flow of corrosion generated hydrogen which converted the cementite to methane which nucleated voids in the steel. A thermodynamic estimate indicated that a small amount of chromium would stabilize the carbides against decomposition by hydrogen...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001283
EISBN: 978-1-62708-215-0
... Macroexamination and microstructural analysis clearly showed that the unusual cracking and radial bursting of the forgings was associated with the poor quality of the raw material, which contained harmful segregation of copper-rich particles, oxide film, and gas voids caused by improper melting practices. The high...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
... than a pitlike appearance. Metallography Microstructural Analysis Metallographic analysis on transverse sections of the tubing followed two procedures, as described below. Examination of nonetched samples was used to detect voids and microcracks. After mounting and rough polishing, the final...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
...×. Metallography Microstructural Analysis Spring 1 was cross sectioned transverse to the wire thickness across several turns adjacent to the fracture. The drawing defect shown in Fig. 2 was observed as a void near the surface ( Fig. 9 ). The steel contained some large inclusions, but appeared to meet...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001494
EISBN: 978-1-62708-235-8
... examination of the fractured leads revealed voids and some oxidized areas surrounded by ductile fracture areas. High pressure steam pockets observed as voids in the microstructure caused hydrogen embrittlement of the leads. The obvious corrective action was to ensure that the lead material was OFHC copper...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001683
EISBN: 978-1-62708-234-1
... occurred at welds and consisted of large subsurface void formations with pinhole penetrations of the surfaces. Corrosive attack initiated in the heat affected zones of the welds, usually immediately adjacent to fusion lines. Stepwise grinding, polishing, and etching through the affected areas revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047753
EISBN: 978-1-62708-235-8
... cracking that originated at multiple origins at the interface between the housing and the braze metal in areas where there were large irregular voids in the braze metal and separation of the joint because of poor bonding. Selected Reference Selected Reference • Fatigue Failures , Failure Analysis...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
... voids Fig. 15 Fractograph of sample C, demonstrating intergranular fracture Fig. 16 FEA relative-stress grayscale map of the component under compressive load Abstract A failure analysis investigation was conducted on a fractured aluminum tailwheel fork which failed moments...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001671
EISBN: 978-1-62708-234-1
..., nondestructive X-ray analysis of the gun tube prior to detonation revealed no evidence of any discontinuities. Void formation has been observed as a result of explosive loading in the laboratory. The voids are an early stage of crack formation and seem to be associated with microcracking in the gun steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
... voids caused by grain boundary sliding: these were adjacent to the main crack leading to fracture and ahead of branch cracks. Figure 2 shows a branch crack and the wedge-type grain boundary voids: Figure 3 shows this latter feature in more detail. Fig. 2 Branch crack from main fracture...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... blade casting. Creep voids can be observed on the fracture surface in this case Fig. 10 SEM backscatter electron (BEI) image documenting additional secondary stress-rupture cracks and wrinkled aluminide coating on the CCV-TE side of SX turbine blade casting Fig. 11 Internally cooled...