Materials Research SciELO（材料研究收录了）.pdfVIP

Materials Research . 2014; 17(2): 518-526 © 2014 DDI: /10.1590/S1516-14392014005000007 Hot Tensile and Creep Rupture Data Extrapolation on 2.25Cr-1Mo Steel Using the CDM Penny-kachanov Methodology a b José Francisco dos Reis Sobrinho , Levi de Oliveira Bueno * aFederal Institute of Education, Science and Technology of Piauí – CEFET/PI, Praça da Liberdade, 1597, CEP 64000-040, Teresina, PI, Brazil bDepartment of Materials Engineering, Federal University of São Carlos – UFSCar, Rod. Washington Luiz, km 235, CEP 13565-905, São Carlos, SP, Brazil Received: September 12, 2013; Revised: November 22, 2013 Hot tensile and creep data were obtained for 2.25Cr-1Mo steel, ASTM A387 Gr.22CL2, at the temperatures of 500-550-600-650-700 °C. Using the concept of equivalence between hot tensile data and creep data, the results were analyzed according to the methodology based on Kachanov Continuum Damage Mechanics proposed by Penny, which suggests the possibility of using short time creep data obtained in laboratory for extrapolation to long operating times corresponding to tens of thousands hours. The hot tensile data (converted to creep) define in a better way the region where β=0 and the creep data define the region where β=1, according to the methodology. Extrapolation to 10,000 h and 100,000 h is performed and the results compared with results obtained by other extrapolation