Título

HOT TENSILE AND CREEP RUPTURE DATA EXTRAPOLATION ON 2.25Cr-1Mo STEEL USING THE CDM PENNY-KACHANOV METHODOLOGY

HOT TENSILE AND CREEP RUPTURE DATA EXTRAPOLATION ON 2.25Cr-1Mo STEEL USING THE CDM PENNY-KACHANOV METHODOLOGY

Autoria

Sobrinho, José Francisco dos Reis; Bueno, Levi de Oliveira

DOI

10.5151/2594-5327-23659

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Resumo

Hot tensile and creep data were obtained for 2.25Cr-1Mo steel, ASTM A387 Gr.22CL2, at the temperatures of 500 - 550 - 600 - 650 - 700oC. Using the concept of equivalence between hot tensile data and creep data, both kind of 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  = 0 and the creep data define the region where  = 1, according to the methodology. Extrapolation to 10,000 h and 100,000 h is performed and the results compared with data obtained by extrapolation using other procedures such as the Larson-Miller and Manson-Haferd methodologies, with the same data. ASTM Datasheet for 10,000 h and 100,000 h as well as data from other authors on 2.25Cr-1Mo steel are used for assessing the reliability of the results.

 

Hot tensile and creep data were obtained for 2.25Cr-1Mo steel, ASTM A387 Gr.22CL2, at the temperatures of 500 - 550 - 600 - 650 - 700oC. Using the concept of equivalence between hot tensile data and creep data, both kind of 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  = 0 and the creep data define the region where  = 1, according to the methodology. Extrapolation to 10,000 h and 100,000 h is performed and the results compared with data obtained by extrapolation using other procedures such as the Larson-Miller and Manson-Haferd methodologies, with the same data. ASTM Datasheet for 10,000 h and 100,000 h as well as data from other authors on 2.25Cr-1Mo steel are used for assessing the reliability of the results.

Palavras-chave

2.25Cr-1Mo steel; Hot tensile/creep data; CDM Penny methodology; Data extrapolation.

2.25Cr-1Mo steel; Hot tensile/creep data; CDM Penny methodology; Data extrapolation.