Crack embrittlement displacement fields
When using precracked fracture toughness specimens to study liquid metal embrittlement it has been necessary to estimate the crack length and applied load as a function of time. These parameters are sometimes difficult to obtain and the accuracy is often questionable. Further this data provides the basis for calculating crack growth rate (da/dt) as a function of applied stress intensity factor K/sub I/. This paper presents an approach based on using moire interferometry in conjunction with fracture toughness specimens to study liquid mercury amalgam embrittlement of 6061-T6 aluminum. Moire interferometry provides a unique method for obtaining K/sub I/, at the crack tip, without requiring knowledge of crack length and load. This paper describes the approach and provides an evaluation based on test results.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 5743825
- Report Number(s):
- EGG-M-0885; CONF-8510237-2; ON: DE86011036
- Resource Relation:
- Conference: DOE symposium on engineering energy sciences, State College, PA, USA, 11 Oct 1985; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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