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Creep behavior of near-stoichiometric polycrystalline binary nial
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Raj, S. V. |
| Copyright Year | 2002 |
| Description | New and published constant load creep and constant engineering strain rate data on near-stoichiometric binary NiAl in the intermediate temperature range 700 to 1300 K are reviewed. Both normal and inverse primary creep curves are observed depending on stress and temperature. Other characteristics relating to creep of NiAl involving grain size, stress and temperature dependence are critically examined and discussed. At stresses below 25 MPa and temperatures above 1000 K, a new grain boundary sliding mechanism was observed with n approx. 2, Qc approx. 100 kJ/ mol and a grain size exponent of about 2. It is demonstrated that Coble creep and accommodated grain boundary sliding models fail to predict the experimental creep rates by several orders of magnitude. |
| File Size | 1311406 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020038217 |
| Archival Resource Key | ark:/13960/t3fz27c3b |
| Language | English |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Grain Boundaries Grain Size Temperature Dependence Stoichiometry Creep Properties Exponents Polycrystals Sliding Nickel Aluminides Failure Loads Forces Strain Rate 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 |
