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ASTM_E1820-05金属材料延性断裂韧度测试方法

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an by more than 60.002 W. measurements of initial crack size defined in 8.5.3 shall differР 8.6.3.2 Proceed with the test using unload/reload sequences by more than 5 % from the average, ao.Рthat produce crack extension measurements at intervals pre- 9.1.4.2 Final Crack Size—None of the nine physical mea-Рscribed by the applicable data analysis section of Annex A8 or surements of final physical crack size, a p, defined in 8.5.3 shallРAnnex A10. Note that at least eight data points are required differ by more than 5 % from the average. In subsequent tests,Рbefore specimen achieves maximum load. If fracture instability the side-groove configuration may be modified within theРis an expected response, then it may be helpful to load the requirements of 7.5 to facilitate meeting this requirement.Р 10

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