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Further study of near solidus intergranular cracking in inconel 718
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Thompson, R. G. |
| Copyright Year | 1981 |
| Description | A series of tests, performed to determine the strain necessary to initiate intergranular cracking in Inconel 718 as a function of temperature, contained enough scatter near the melting temperature that questions remained as to the best curve of curves to fit to the data. Fracture surface analysis showed that the scatter was due to incipient melting in the grain boundary region. The melting contributed to low fracture strain but had only a small on the incipient cracking strain. Gleeble tests, which could be interrupted by water quenching, were used to study the incipient intergranular melting of Inconel 718. This modified weld simulation test provided a sufficiently rapid quench to preserve the intergranular microstructure created during incipient melting. This structure was studied both microscopically and with energy dispensive X-ray analysis. The implications of incipient melting and low-strain incipient cracking on the development of microfissuring envelopes are discussed. |
| File Size | 3348617 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820002321 |
| Archival Resource Key | ark:/13960/t01z91773 |
| Language | English |
| Publisher Date | 1981-09-17 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Quenching Cooling Microcracks Temperature Dependence Stress Corrosion Melting Welded Structures Ductility Tensile Tests Plastic Properties Microstructure Intergranular Corrosion Inconel Trademark 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 |
