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A ternary beryllide was prepared by mixing Be 12 V with Be 12 Ti and using plasma sintering. After preparation at a pressure of 54 MPa for 20 min at 1200 °C, the changes in mechanical and thermal properties due to the addition of 1 wt.% Be 12 V and 10 wt.% Be 12 V were investigated. The Vickers hardness of both Be 12 Ti+1 wt.%Be 12 V and Be 12 Ti+10 wt.%Be 12 V were lower than Be 12 Ti. In addition, the fracture toughness was calculated using the IF method, and the calculation formula was calculated using various equations. According to the Anstis equation, it was 3.23 ± 0.13 MPa·m0.5 for Be 12 Ti, and it increased to 4.47 ± 0.13 MPa·m0.5 for Be 12 Ti+1 wt.%Be 12 V. As Be 12 V was added, it increased compared to Be 12 Ti. In the case of thermal properties, the thermal diffusivity of Be 12 Ti and Be 12 Ti+1 wt.%Be 12 V showed almost the same value, while that of Be 12 Ti+10 wt.%Be 12 V was lower than others. In the case of specific heat, moreover, it tended to decrease as the temperature increased in comparison to Be 12 Ti. This trend was particularly evident when 10 wt.% Be 12 V was added. Thus, the results of the thermal conductivity calculation indicated a decrease in tendency as the amount of addition increased in comparison to Be 12 Ti. Therefore, the addition of 1 wt.% Be 12 V seems to be more effective than the addition of 10 wt.% Be 12 V. [ABSTRACT FROM AUTHOR]

• Based on the SDC-IC standard, a integral analysis of thermal mechanical properties was conducted using a combination of elastic and plastic analysis methods • In ductile damage analysis, local plastic yielding occurs in the inner tube, but the overall load-bearing performance of the structure is good. • In non-ductile damage analysis, the T-tube unit have the immediate plastic flow localization, but there is no the immediate local fracture due to exhaustion. • From the perspective of transient cyclic thermal hydraulic analysis, the results show that there will be no ratcheting. To verify the mechanical properties of the helium-cooled T-tube divertor, based on the thermal hydraulic optimization of the T-tube divertor, a preliminary analysis was conducted through a combination of elastic and elasto-plastic analysis. The results show that for the M-type damage mode, the T-tube divertor exhibits a small-scale plastic yielding phenomenon, but this has no effect on the overall divertor. The T-tube divertor has local necking deformation but does not fail due to immediate local fracture, and the T-tube divertor has no creep rupture. For the C-type damage mode, the plastic strain of the T-tube divertor is not accumulated under cyclic loading, but in the fatigue analysis, the life of the divertor does not meet the design standards and further optimization is needed. The conclusion shows that the optimized helium-cooled T-tube divertor has good thermo-mechanical properties, and the safety of the helium-cooled T-tube divertor unit can be guaranteed. [ABSTRACT FROM AUTHOR]