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The slabs of a single crystal superalloy were poured with 2.2% Re, 3.2% Re and 4.2% Re and otherelement contents of the alloys were basicalIy kept no changed. The effects of Re on the ultimatetensile strength, creep rupture life and rafting of a single crystal superalloy were studied. Theresults showed that with increasing Re content the ultimate tensile strength decreased but theplasticity increased at 649℃. and the creep rupture life remarkably increased while the plasticitydecreased at 982℃/248.2 MPa. 1038℃/206.8 MPa and 1070℃/176.8 MPa for the alloy, on themicrostructure aspect, with increasing the creep rupture life of the alloy the rafting was gettingbigger and bigger at the same test condition, and the rafting suppressed creep and increasedcreep rupture life in this single crystal superalloy.
The slabs of a single crystal superalloy were poured with 2.2% Re, 3.2% Re and 4.2% Re and otherelement contents of the alloys were basicalIy kept no changed. The effects of Re on the ultimatetensile strength, creep rupture life and rafting of a single The results showed that with increasing content of the ultimate tensile strength decreased but the plasticity increased at 649 ° C. and the creep rupture life remarkably increased while the plasticity decreased at 982 ° C / 248.2 MPa. 1038 ° C / 206.8 MPa and 1070 ° C / 176.8 MPa for the alloy, on theseicrostructure aspect, with increasing the creep rupture life of the alloy the rafting was gettingbigger and bigger at the same test condition, and the rafting suppressed creep and increased creep rupture life in this single crystal superalloy.