Lowercontentofcarboncanfurtherimprovethestressrupturelifeofp-modifiedDA718alloyuptomorethan270%.Meanwhile,theductilityofthealloydecreasedalittle.Moreboronatomsdissociateduetodecreasingcarboncontentandinteractwithphosphoruswhichbringsthelongerstressrupturelifeofthealloy.Lesscarbonmayinducemorephosphorussegregatinginthegrainboundaryandresultinbrittleness.