| 发明名称 | Method for evaluating corrosion-fatigue life of steel material | ||
| 摘要 | A method for evaluating the corrosion-fatigue life of a steel material includes: bringing a corrosive medium into contact with a predetermined portion of the steel material; measuring strain on the steel material while applying cyclic loads to the steel material; measuring an N-th strain index from strain amplitude at the number of initial load applications and strain amplitude at the N-th load application (N is a natural number larger than the number of initial load applications); and estimating the corrosion-fatigue life of the steel material by comparing the N-th strain index with a previously certified life strain index. | ||
| 申请公布号 | US9128018(B2) | 申请公布日期 | 2015.09.08 |
| 申请号 | US201414205876 | 申请日期 | 2014.03.12 |
| 申请人 | HITACHI METALS, LTD. | 发明人 | Sugano Ryuuichiroh;Horie Hidemitsu;Kataoka Kouta;Nakano Yousuke |
| 分类号 | G01N3/32;G01N17/00 | 主分类号 | G01N3/32 |
| 代理机构 | Greenblum & Bernstein, P.L.C. | 代理人 | Greenblum & Bernstein, P.L.C. |
| 主权项 | 1. A method for evaluating the corrosion-fatigue life of a steel material comprising: bringing a corrosive medium into contact with a predetermined portion of the steel material; measuring a strain amplitude on the steel material while applying cyclic loads to the steel material; measuring an N-th strain index from the strain amplitude at the number of initial load applications through which the strain amplitude is substantially constant and from the strain amplitude at the N-th load application (N is a natural number larger than the number of initial load applications); and estimating the corrosion-fatigue life of the steel material by determining the value of N for which the strain index value reaches or exceeds a value equal to a previously certified life strain index. | ||
| 地址 | Tokyo JP | ||