Vamas Second Round Robin Test of Structural Materials at Liquid Helium Temperature
A second international round robin(RR) tensile and fracture toughness test program at liquid helium temperature has been coordinated under the Versailles Project on Advanced Materials and Standards (VAMAS). This RR-test was carried out in order to refine procedures of the tests and clarify remaining problems, so that some testing conditions were limited. The results were considerably improved compared to the those in first RR-test; average yield strength was 1065 MPa with a standard deviation of 15 MPa (1.4% to the average) and fracture toughness was 263 MPa√m with a standard deviation of 15.3 MPa√m(5.8%).
KeywordsFracture Toughness Round Robin Fracture Toughness Test Liquid Helium Temperature Initial Crack Length
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