Abstract
In order to develop potential reduced activation manganese-stabilized austenitic steels for use in the first wall component of a fusion reactor, tensile and high temperature creep properties have been investigated for simple and solute-modified 10%Cr30%Mn austenitic steels. The yield stress increased linearly with carbon concentration over the range from room temperature to 873 K. The creep-rupture strength at 873 K increased linearly with carbon concentration at short times, below 360 ks (100 h). The contribution of carbon to the increase in creep rupture strength decreased at high carbon concentrations, above 0.2%, and at long times, above 3600 ks (1000 h). A solute-modified 10Cr30Mn2W0.2Ti0.008B0.04P0.15C (wt%) steel exhibited very high tensile and creep rupture strength that were superior to those of type 316 steel.
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