| Autor: |
WU HaiLi, SUN LinGen |
| Jazyk: |
čínština |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Jixie qiangdu, Vol 44, Pp 232-238 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1001-9669 |
| DOI: |
10.16579/j.issn.1001.9669.2022.01.031 |
| Popis: |
The multi-specimen method and the normalization method and the elastic unloading compliance method were used to test the high-temperature fracture toughness of 630℃ on new rotor steel FW2. The multi-specimen method and the normalization method have obtained valid high-temperature fracture toughness test results. Comparison of the test results shows that the J-R resistance curve obtained by normalization method is within the ± 99.7% confidence interval of the fitting curve of the multi-sample method. The fracture toughness characteristic value J0.2 BL obtained by normalization method is lower than the characteristic value J0.2 BLobtained by the multi-specimen method and is located at the lower limit of the confidence interval of the multi-specimen method, which verifies the validity of the normalization method. Elastic unloading compliance method is not suitable for the high-temperature fracture toughness test for the stress field at the crack tip of FW2 steel does not conform to the elastic-plastic fracture mechanical characteristics at elevated temperature. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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