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 |
|---|---|
| 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 |