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Kinetic studies of the stress corrosion cracking of d6ac steel
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Noronha, P. J. |
| Copyright Year | 1975 |
| Description | The effect of load interactions on the crack growth velocity of D6AC steel under stress corrosion cracking conditions was determined. The environment was a 3.5 percent salt solution. The modified-wedge opening load specimens were fatigue precracked and subjected to a deadweight loading in creep machines. The effects of load shedding on incubation times and crack growth rates were measured using high-sensitivity compliance measurement techniques. Load shedding results in an incubation time, the length of which depends on the amount of load shed and the baseline stress intensity. The sequence of unloading the specimen also controls the subsequent incubation period. The incubation period is shorter when load shedding passes through zero load than when it does not if the specimen initially had the same baseline stress intensity. The crack growth rates following the incubation period are also different from the steady-state crack growth rate at the operating stress intensity. These data show that the susceptibility of this alloy system to stress corrosion cracking depends on the plane-strain fracture toughness and on the yield strength of the material. |
| File Size | 622679 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750013362 |
| Archival Resource Key | ark:/13960/t2z36kt80 |
| Language | English |
| Publisher Date | 1975-03-25 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Toughness Stress Corrosion High Strength Steels Cracking Fracturing Kinetics Fracture Strength Creep Tests Salt Spray Tests Crack Propagation Load Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
