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Pratt & Whitney PWA36604 Revision C Stress Corrosion |
TEST STANDARD:
To achieve "Conformance", 3.2.3.1 Stress Corrosion: The test specimens of AMS 4911 and AMS 4916 shall show no evidence of stress corrosion cracking when tested in accordance with Pratt & Whitney Materials Control Laboratory Manual Section E - 205 or ASTM F-945 Method A.
TEST RESULT:
Test 1: AMS 4911 Titanium Alloy
| TEST SOLUTION | TEST | OBSERVATION | RESULT |
| EnTron Solvent | #1 | No Evidence of Cracking | EnTron Conforms |
| #2 | No Evidence of Cracking | EnTron Conforms | |
| #3 | No Evidence of Cracking | EnTron Conforms | |
| Blank Control | #1 | No evidence of Cracking | AMS 4911Specimens meet this test's acceptability and sensitivity criteria. |
| #2 | No Evidence of Cracking | ||
| #3 | No Evidence of Cracking | ||
| 3% Salt Control | #1 | Cracking Evident in Control | AMS 4911Specimens meet this test's acceptability and sensitivity criteria. |
| #2 | Cracking Evident in Control | ||
| #3 | Cracking Evident in Control |
Test 2: AMS 4916 Titanium Alloy
| TEST SOLUTION | TEST | OBSERVATION | RESULT |
| EnTron Solvent | #1 | No Evidence of Cracking | EnTron Conforms |
| #2 | No Evidence of Cracking | EnTron Conforms | |
| #3 | No Evidence of Cracking | EnTron Conforms | |
| Blank Control | #1 | No Evidence of Cracking | AMS 4916 Specimens meet this test's acceptability and sensitivity criteria. |
| #2 | No Evidence of Cracking | ||
| #3 | No Evidence of Cracking | ||
| 3% Salt Control | #1 | Cracking Evident in Control | AMS 4916 Specimens meet this test's acceptability and sensitivity criteria. |
| #2 | Cracking Evident in Control | ||
| #3 | Cracking Evident in Control |
TEST METHOD UTILIZED:
Tested in Accordance with ASTM F 945:
General Procedure: Method A (Heat at 900°F ± 200°F (480°C ± 100°C) for 8 ± 0.2 hours)
Determination of Test Results
- Detection of cracks on either the tension or compression surfaces of any of the untreated (control) specimens shall be cause to repeat the entire stress corrosion test using acceptable titanium alloy sheet material.
- Failure to detect cracks on either the tension or compression surfaces of all of the sodium chloride solution treated specimens shall be cause to repeat the entire stress corrosion test using titanium alloy sheet having a demonstrated susceptibility to stress corrosion cracking.
- Examine tension and compression surfaces of candidate solution treated specimens for cracks and make one of the following dispositions: a. Failure to detect cracks on any specimen shall constitute an acceptance test for the EnTron cleaning material - “Conforms”. b. Detection of cracks on all specimens shall be cause for rejection of the EnTron cleaning material - “Does not Conform”.
- If some of the specimens do not exhibit cracks, the entire stress corrosion test may be repeated at the option of the testing facility.