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fractograph

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000203
EISBN: 978-1-62708-312-6
... characterized by the presence of compounds, such as oxides, carbides, and nitrides, and various forms of corrosion. austenitic stainless steel carbides corrosion ferritic stainless steel fractograph microstructure nitrides oxides photomicrograph porosity sintering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... in the chapter are: collection of background information and sampling; preliminary laboratory examination; detailed metallographic and fractographic examinations; chemical analysis of corrosion products and bulk materials; corrosion testing for quality control; mechanical testing for quality control...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780417
EISBN: 978-1-62708-281-5
... Abstract This article depicts typical fractographic features for a number of different composite materials, covering interlaminar and translaminar fracture characteristics in composite materials. fractography composites interlaminar fracture translaminar fracture FRACTURE SURFACES...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... nondestructive tests, preparing and examining fractographs and micrographs, determining failure mode, writing the report, and developing follow-up recommendations. It also examines the fundamental mechanisms of failure, why they occur, and how to identify them by their characteristic features. failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270072
EISBN: 978-1-62708-301-0
... Abstract This chapter documents the key findings of an investigation into the failure of an aircraft’s main wheel bearing housing. Using annotated images and a detailed SEM fractograph, it shows what investigators observed that led them to conclude that the flange on one of the hubs broke off...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270078
EISBN: 978-1-62708-301-0
... from the starboard side of the aircraft. A close-up view of the threads near the fracture surface provides evidence of bending, while the presence of dimples in an SEM fractograph supports the theory that the link rod failed as a result of overload. fractography stabilizer link rod visual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270138
EISBN: 978-1-62708-301-0
... A nimonic alloy turbine blade failed in service within 5 hours of total operation. Fractographic analysis indicated failure by low-cycle fatigue. A high-pressure turbine blade failed in service within 5 hours of total operation. Fractographic analysis was carried out to find the mode of failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270162
EISBN: 978-1-62708-301-0
... areas examined. overload failure SEM fractography tail boom attachments visual examination A helicopter crashed. From the wreckage, certain components of the tail boom attachment were found fractured. Fractographic examination was carried out on these. They had failed by...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270076
EISBN: 978-1-62708-301-0
... were examined in a SEM. Figures CH6.4 and CH6.5 are the SEM fractographs of the two regions. The fractographs indicate dimples characteristic of failure by overload. There are no indications of progressive failure. Fig. CH6.4 SEM fractograph of the bolt shown in Fig. CH6.3 , showing dimples...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270172
EISBN: 978-1-62708-301-0
... stereobinocular microscope and a SEM. The fracture surface was typically of the brittle, overload type, with very little plastic deformation. A SEM fractograph showed features resembling cleavage, with indications of isolated dimples, but the overall fracture feature was brittle ( Fig. CH45.1 ). An EDAX in the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270185
EISBN: 978-1-62708-301-0
... bolt M-2 The SEM fractographs of pieces 1 and 4 of the En 24 steel bolts are shown in Fig. CH51.5 . They show well-defined dimples characteristic of failure by tensile overload. There was no evidence of any delayed failure. Fig. CH51.5 SEM fractographs of the bolts shown in Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270135
EISBN: 978-1-62708-301-0
... had a crack, proceeding from the shroud hole toward the leading edge, on the concave side of the blade profile. Figure CH30.4 is a SEM fractograph of the failed blade. The fracture is intergranular. The crack in the blade was opened to expose the fracture surface. The dark region in one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... Failed shaft showing the location of fracture In spite of rubbing, certain macroscopic and microscopic features were discernible on the fracture surface when observed in a SEM. Figure CH25.2 is a SEM fractograph of the gross features on one of the fracture surfaces. The surface was flat with...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270100
EISBN: 978-1-62708-301-0
... surface away from this region showed dimples characteristic of tensile mode of failure ( Fig. CH16.5 ). Fig. CH16.3 SEM fractograph showing the relatively smooth fatigue fracture region Fig. CH16.4 SEM fractograph showing fatigue striations in the region shown in Fig. CH16.3...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270143
EISBN: 978-1-62708-301-0
... fracture surface, region II ( Fig. CH33.2 ), had a fresh and rough fracture surface and a coarse crystalline appearance. The gross fractographic features were typical of overload failure. Figure CH33.5 shows a low-magnification fractograph of the fatigue-failed region. Beach marks, typical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270150
EISBN: 978-1-62708-301-0
... SEM fractograph near the origin showing fatigue striations along with cracking Fig. CH36.4 SEM fractograph farther away from the origin showing very-fine fatigue striations Detailed examination of the fracture surface near the origin revealed the presence of inclusions ( Fig. CH36.5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270141
EISBN: 978-1-62708-301-0
... material and the processing conditions of the blade were found to be satisfactory. Macro, micro, and electron fractographic investigations showed that the blade had failed by an impact load acting on its concave side. During the testing of an aircraft engine, a compressor blade fractured at the root...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270065
EISBN: 978-1-62708-301-0
... to the rivet hole, suffered tearing mode of fracture. Figure CH1.3 shows the characteristic dimple structure from one of these regions. Immediately adjacent to this region, fatigue striations were observed ( Fig. CH1.4 ). Fig. CH1.3 SEM fractograph of region A of Fig. CH1.1 , close to the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270122
EISBN: 978-1-62708-301-0
... section. Fig. CH24.2 Fracture surface of the shaft In region A, elongated dimples were seen under the SEM ( Fig. CH24.3 ). Equiaxed dimples were seen in region B, the region of final fracture ( Fig. CH24.4 ). Fig. CH24.3 SEM fractograph showing elongated dimples in region A of Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... ). At higher magnifications, striations were seen confirming the fatigue crack propagation ( Fig. CH2.4b ). Fig. CH2.3 SEM fractograph showing intergranular fracture at the leading edge of the LPTR blade Fig. CH2.4 SEM fractographs showing (a) beach marks and (b) striations in the...