24 KB352 KB25 KB200020242006Dashunin, NikolayGetsov, LeonidManilova, ElenaMozaiskaja, NataliPigrova, GalinaRybnikov, Alexandrletnik:40številka:57 stranistr. 185-191ISSN:1580-2949COBISSID:576938URN:URN:NBN:SI:doc-IPXW4M1CenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijemehanske lastnostimikrostrukturanapoved trajnostne dobenikljeve zlitinesuperzlitineturbinske lopaticeThe influence of long-term service exposure on the structure and properties of high-temperature steels and alloys|The results of studies on the mechanical properties, long-term durability, thermal fatigue resistance and microstructure of metal blades made from various steels and Ni-based superalloys after long-term (up to 100,000 h) main-gas-line exposure conditions are presented. The data were developed and the calculations of the stress-strain state of the blades were used as the basis for a proposal for their projected lifetime. An extrapolation method using long durability curves based on a lifetime of 300,000 h was developed and is illustrated with an example of a 12 % Cr steelV prispevku so predstavljeni rezultati študije mehanskih lastnosti pri dolgotrajni izpostavljenosti visokim temperaturam in odpornost proti termičnemu utrujanju kot tudi mikrostruktura turbinskih lopatic, izdelanih iz različnih vrst jekel in Ni-superzlitin po dolgotrajnem (do 100.000-urnem) obratovanju v seriji plinskih turbin. Ugotovljeni eksperimentalni rezultati in izračuni napetostno-deformacijskega stanja turbinskih lopatic so bili uporabljeni kot osnova za projekcijo njihove preostale trajnostne dobe. Razvita je bila ekstrapolacijska metoda, ki uporablja krivulje dolgotrajne izpostavljenosti do 300.000 h. Prikazan je primer za jeklo z 12 % CrTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije