Fine grained Ni-based alloys for resistance to stress corrosion cracking and methods for their design
US8640941B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12222
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A class of nickel based alloys having a fine grain structure resistant to stress corrosion cracking, and methods of alloy design to produce further alloys within the class are presented. The alloys act as suitable welding materials in similar applications to that of Alloy 622. The fine-grained structure of these novel alloys may also be advantageous for other reasons as well such as wear, impact, abrasion, corrosion, etc. These alloys have similar phases to Alloy 622 in that they are composed primarily of austenitic nickel, however the phase morphology is a much finer grained structure opposed to the long dendritic grains common to Alloy 622 when it is subject to cooling rates from a liquid state inherent to the welding process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.