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Title: Statistical modeling of fatigue crack growth rate in inconel alloy 600
Title of periodic: International Journal of Fatigue Guildford
Authors: Al-Rubaie, K.
Godefroid, L.B.
Lopes, Jadir Antônio Moreira
Affiliation: Empresa Brasileira de Aeronáutica/EMBRAER, São José Dos Campos, SP, Brasil
Universidade Federal de Ouro Preto/UFOP, Ouro Preto, MG, Brasil
Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
Issue Date: 2007
Keywords: Inconel 600;fatigue;crack propagation;statistiscs;simulation
Abstract: Inconel alloy 600 is widely used in heat-treating industry, in chemical and food processing, in aeronautical industry, and in nuclear engineering. In this work, fatigue crack growth rate (FCGR) was evaluated in air and at room temperature under constant amplitude loading at a stress ratio of 0.1, using compact tension specimens. Collipriest and Priddle FCGR models were proposed to model the data. In addition, these models were modified to obtain a better fit to the data, especially in the near-threshold region. Akaike information criterion was used to select the candidate model that best approximates the real process given the data. The results showed that both Collipriest and Priddle models fit the FCGR data in a similar fashion. However, the Priddle model provided better fit than the Collipriest model. The modified Priddle model was found to be the most appropriate model for the data.
Access: L
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