Abstract
Rotating bending fatigue tests were carried out for Inconel 718 at room temperature and elevated temperatures of 300°C, 500°C and 600°C to investigate the influence of temperature on the fatigue crack growth resistance. The crack growth rate can be expressed by the small crack growth law, dl/dN=C<SUB>1</SUB>σ<SUP>n</SUP><SUB>a</SUB>l=C<SUB>2</SUB>(σ<SUB>a</SUB>/σ<SUB>B</SUB>)<SUP>n</SUP>l, at all the temperatures, where σ<SUB>B</SUB>, σ<SUB>a</SUB> and l are the tensile strength, the stress amplitude and the crack length, and C<SUB>1</SUB>, C<SUB>2</SUB> and n are constants. Therefore, the resistance to crack growth was evaluated using the small crack growth law. The fatigue crack growth resistance decreased with the increase of temperature.
Translated title of the contribution | Fatigue Crack Growth Resistance in Nickel-Base Superalloy at Elevated Temperatures |
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Original language | Japanese |
Pages (from-to) | 2298-2302 |
Number of pages | 5 |
Journal | Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A |
Volume | 63 |
Issue number | 615 |
DOIs | |
Publication status | Published - Nov 25 1997 |