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fractographs

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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. References References 1. Smith B.W. et al. , Fractographic Analysis of Interlaminar...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... discussed 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... (8620). This scanning electron microscope fractograph shows the roughly horizontal ridges, which are the advance of the crack front with each load application. The crack progresses in the direction of the arrow. Original magnification at 2000× Fig. 5 The offsetting effect of rotation...
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 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270078
EISBN: 978-1-62708-301-0
... recovered 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
... Summary Background Visual Examination of General Physical Features Testing Procedure and Results 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270185
EISBN: 978-1-62708-301-0
... bolts Fig. CH51.4 (a) Fracture surface of bolt M-1. (b) Fracture surface of bolt M-2 Scanning Electron Fractography Conclusion Recommendation 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270162
EISBN: 978-1-62708-301-0
... attachment were found fractured. Fractographic examination was carried out on these. They had failed by bending/overload. Following a helicopter crash, certain components from the tail boom attachment that were found fractured were recovered ( Fig. CH42.1 ). Also, the snapped tail rotor pitch control...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270143
EISBN: 978-1-62708-301-0
... of the blade Fig. CH33.4 Photograph showing dent marks at the crack origin The remaining portion of the 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270135
EISBN: 978-1-62708-301-0
... 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 of the corners ( Fig. CH30.5 ) shows that there was a preexisting crack that must have been oxidized. The SEM fractograph...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270076
EISBN: 978-1-62708-301-0
... with the adaptor Scanning Electron Fractography Conclusion and Recommendations The fracture surfaces indicated by arrows in Fig. CH6.2 and CH6.3 were examined in a SEM. Figures CH6.4 and CH6.5 are the SEM fractographs of the two regions. The fractographs indicate dimples characteristic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270025
EISBN: 978-1-62708-301-0
...-2856-8 2. LeMay I. , Use of Microscopy in Failure Analysis , Applied Metallography , Vander Voort G.F. , Ed., Van Nostrand Reinhold Co. , New York , 1986 10.1007/978-1-4684-9084-8_15 3. Fractography and Atlas of Fractographs , Vol 9 , Metals Handbook , 8th ed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270100
EISBN: 978-1-62708-301-0
... region. Fatigue striations were observed in this region at higher magnifications ( Fig. CH16.4 ), indicating propagation by low-cycle fatigue. The jagged fracture surface away from this region showed dimples characteristic of tensile mode of failure ( Fig. CH16.5 ). Fig. CH16.3 SEM fractograph...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130351
EISBN: 978-1-62708-284-6
... origins located on the outside periphery of the fractures. Fracture ridges also gave evidence of fatigue origin locations on the outside periphery of the fracture. Fig. 5 SEM fractographs documenting typical topographic features of the strain bar primary fracture surface. (a) Overall view of strain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270124
EISBN: 978-1-62708-301-0
... is a SEM fractograph of the gross features on one of the fracture surfaces. The surface was flat with deformation marks with no shear lips. The region of final fracture was at the center point of the shaft cross section. Fig. CH25.2 SEM fractograph showing features typical of torsional overload...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270150
EISBN: 978-1-62708-301-0
... from the origin but still within the region of beach marks, the striation appeared much finer and without cracks ( Fig. 36.4 ). The rapid fracture region showed the presence of dimples. Fig. CH36.3 SEM fractograph near the origin showing fatigue striations along with cracking Fig. CH36.4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270087
EISBN: 978-1-62708-301-0
... at higher magnifications ( Fig. CH11.3 ). The features of the fast-fracture region are shown in Fig. CH11.4 . Fig. CH11.2 SEM fractograph of the failed blade Fig. CH11.3 SEM fractograph of the failed blade, showing fatigue striations Fig. CH11.4 SEM fractograph of the fast...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... 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 fatigue failed region A piece from the blade close to the fracture surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270172
EISBN: 978-1-62708-301-0
... was cleaned ultrasonically and observed in a 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
.... , Shockey D.A. , and Jones R.L. , Deriving SCC Initiation Times and Growth Rates from Post-Test Fractographic Analysis , Corrosion , Vol 47 ( No. 7 ), July 1991 , p 528 14. Kobayashi T. and Shockey D.A. , A Fractographic Investigation of Thermal Embrittlement in Cast...