Method of estimating hold time sweep crack growth properties
US6405601B1 · kind B1 · utility
2Cited by
3References
5Claims
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Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Feb 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method to estimate the crack growth rate of HIPed cast IN718 material with various grain sizes and working environments comprising determining the average grain size diameter and duration of hold time and solving the following equation, whereby N is the number of operating cycles, a is the crack length, da/dN is crack growth rate GS is the average grain size in meters, HT is hold time in seconds, Env is 1 for an air environment, and Env is −1 if a steam environment. The estimates obtained from the transfer function can be used for designing of and predicting the life of cast IN718 components such as manifolds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.