Fractography
≈ 3 min read
Names in other languages
No names in other languages are held for this entry yet.
Article bodies are English and are not machine-translated. A name in another language is not a translation of the article.
. Hachures are the lines on fracture surface that can be traced back to the origin of the fracture. Fractography is the study of the fracture surfaces of materials. Fractographic methods are routinely used to determine the cause of failure in engineering structures, especially in product failure and the practice of forensic engineering or failure analysis. In material science research, fractography is used to develop and evaluate theoretical models of crack growth behavior. One of the aims of fractographic examination is to determine the cause of failure by studying the characteristics of a fractured surface. Different types of crack growth (e.g. fatigue, stress corrosion cracking, hydrogen embrittlement) produce characteristic features on the surface, which can be used to help identify the failure mode. The overall pattern of cracking can be more important than a single crack, however, especially in the case of brittle materials like ceramics and glasses.
. Hachures are the lines on fracture surface that can be traced back to the origin of the fracture.]] Fractography is the study of the fracture surfaces of materials. Fractographic methods are routinely used to determine the cause of failure in engineering structures, especially in product failure and the practice of forensic engineering or failure analysis. In material science research, fractography is used to develop and evaluate theoretical models of crack growth behavior. One of the aims of fractographic examination is to determine the cause of failure by studying the characteristics of a fractured surface. Different types of crack growth (e.g. fatigue, stress corrosion cracking, hydrogen embrittlement) produce characteristic features on the surface, which can be used to help identify the failure mode. The overall pattern of cracking can be more important than a single crack, however, especially in the case of brittle materials like ceramics and glasses.
USB Microscopy
USB microscopes are especially useful for examining fracture surface features since they are small enough to be hand-held. A variety of camera sizes and resolution are available commercially at low cost. The camera cable plugs into the computer via a USB plug and most such devices come with illumination at the camera supplied by LED lights.
See also
Conchoidal fracture Fatigue (material) Failure analysis Forensic engineering Forensic materials engineering Fracture Forensic polymer engineering Forensic science
References
Lewis, Peter Rhys, Reynolds, K, and Gagg, C, Forensic Materials Engineering: Case studies, CRC Press (2004). Mills, Kathleen Fractography, American Society of Metals (ASM) handbook, volume 12 (1991). N.T. Goldsmith, R.J.H. Wanhill, L. Molent, Quantitative fractography of fatigue and an illustrative case study, Engineering Failure Analysis, volume 96 (February 2019) Pages 426–435.
Text derived from https://en.wikipedia.org/w/index.php?oldid=1291869338 under CC BY-SA 4.0; modifications have been made.