Nickel base superalloy articles with improved resistance to crack propagation
US5725692A · kind A · utility
13Cited by
29References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S60/909
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a heat treated, gamma prime precipitation strengthened nickel base alloy having an improved resistance to hydrogen embrittlement, particularly crack propagation. The alloy has a microstructure which is essentially free of script carbides, gamma--gamma prime eutectic islands and porosity. The microstructure further includes a plurality of regularly occurring large barrier gamma prime precipitates and a continuous field of fine cuboidal gamma prime precipitates surrounding the large barrier gamma prime precipitates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.