Treatment method for improving fatigue life and long-life metal material treated by using same treatment
US7399371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2004 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Jun 24, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/90
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A novel treatment method, for improving fatigue life, is provided that aims to resolve problems associated with conventional treatment methods for improving fatigue life of metal by reduction of stress concentration and conventional treatment methods for improving fatigue life of metal by introduction of compressive stress, that is, problems of poor efficiency in work execution, required level of skill of workers, and the impossibility of quality control due to lack of means for measuring the effect after treatment, characterized in that, for locations in metal for which fatigue is a problem, after pre-treatment is performed, ultrasonic impact treatment is performed, and thereafter, a quality assurance test is performed so as to improve the fatigue life of the metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.