failure_analysis - Failure Analysis and Prevention, Volume...

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Failure Analysis and Prevention, Volume 11, ASM Handbook, 1986 Stages of an Analysis • Collection of background data and selection of samples • Preliminary examination of failed part [visual exam and record keeping] • Nondestructive testing Mechanical testing [hardness, toughness, etc.] * • Selection, identification, preservation and/or cleaning of all specimens • Macroscopic examination and analysis [fracture surfaces, secondary cracks, etc.] • Microscopic examination and analysis Selection and preparation of metallographic sections * • Examination and analysis of metallographic sections • Determination of failure mechanism
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Stages of an Analysis, continued… • Chemical analyses [bulk, local, surface corrosion products, deposits or coatings – EDX/EDS, XPS/ESCA, EPMA] • Analysis of mechanics, including fracture mechanics Testing under simulated service conditions [exemplar testing, special tests] • Analysis of all the evidence, formulation of conclusions, development of opinions and writing the report [including recommendations]
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Collection of background data and selection of samples Collection of background data and selection of samples • Design, manufacturing and processing history • Service history including maintenance and service records Photographic records [ in situ ] • Digital v. film? • Color requires a neutral gray background or equivalent
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failure_analysis - Failure Analysis and Prevention, Volume...

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