In this paper the general approximate method is used for calculating the stress intensity factor of the 9th grade disk of 31-25-2 type steam turbine with a radial crack in the corner of the key-slot and the fracture toughness of the material of the disk 34CrNi3Mo steel is determined. The K,< obtaine
Experimental evaluation of brittle crack propagation velocity—an improved technique
✍ Scribed by C.P. Debel
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 730 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
short review of experimental methods currently used in evaluating the velocity of fast crack extension is given. The technique of applying a surface deposited grid gauge has been innovated. This new technique involves a grid produced by a phot~hemic~ method and an electronic registration circuit based on integrated transistor-transistor logic. This new method has been applied to experimental studies of brittle crack extension in steel at temperatures between -11s and t22"c.
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