Loading...
Please wait, while we are loading the content...
Foreign object damage behavior of two gas-turbine grade silicon nitrides by steel ball projectiles at ambient temperature
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bhatt, Ramakrishna T. Janosik, Lesley A. Pereira, J. Michael Choi, Sung R. |
| Copyright Year | 2002 |
| Description | Foreign object damage (FOD) behavior of two commercial gas-turbine grade silicon nitrides, AS800 and SN282, was determined at ambient temperature through strength testing of flexure test specimens impacted by steel-ball projectiles with a diameter of 1.59 mm in a velocity range from 220 to 440 m/s. AS800 silicon nitride exhibited a greater FOD resistance than SN282, primarily due to its greater value of fracture toughness (K(sub IC)). Additionally, the FOD response of an equiaxed, fine-grained silicon nitride (NC132) was also investigated to provide further insight. The NC132 silicon nitride exhibited the lowest fracture toughness of the three materials tested, providing further evidence that K(sub IC) is a key material parameter affecting FOD resistance. The observed damage generated by projectile impact was typically in the forms of well- or ill-developed ring or cone cracks with little presence of radial cracks. |
| File Size | 1684258 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020082954 |
| Archival Resource Key | ark:/13960/t5n926j50 |
| Language | English |
| Publisher Date | 2002-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Cracks Projectiles Ambient Temperature Silicon Nitrides Balls Fracture Strength Flexing Impact Damage Foreign Bodies 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 |
