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Creep-rupture behavior of 6 candidate stirling engine iron-base superalloys in high pressure hydrogen. volume 1: air creep-rupture behavior
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bhattacharyya, S. |
| Copyright Year | 1982 |
| Description | Four wrought alloys (A-286, IN 800H, N-155, and 19-9DL) and two cast alloys (CRM-6D and XF-818) were tested to determine their creep-rupture behavior. The wrought alloys were used in the form of sheets of 0.89 mm (0.035 in.) average thickness. The cast alloy specimens were investment cast and machined to 6.35 mm (0.250 in.) gage diameter. All specimens were tested to rupture in air at different times up to 3000 h over the temperature range of 650 C to 925 C (1200 F to 1700 F). Rupture life, minimum creep rate, and time to 1% creep strain were statistically analyzed as a function of stress at different temperatures. Temperature-compensated analysis was also performed to obtain the activation energies for rupture life, time to 1% creep strain, and the minimum creep rate. Microstructural and fracture analyses were also performed. Based on statistical analyses, estimates were made for stress levels at different temperatures to obtain 3500 h rupture life and time to 1% creep strain. Test results are to be compared with similar data being obtained for these alloys under 15 MPa (2175 psi) hydrogen. |
| File Size | 29219436 |
| Page Count | 127 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830014118 |
| Archival Resource Key | ark:/13960/t3421sw7g |
| Language | English |
| Publisher Date | 1982-12-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Metal Fatigue Stirling Cycle Heat Resistant Alloys Stress-strain-time Relations Creep Rupture Strength Iron Alloys Stirling Engines High Temperature Air Microstructure Activation Energy Fractography High Pressure 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 |
