✦ LIBER ✦

Fatigue crack growth behaviour of Inconel 718 – the concept of a damaged zone caused by high temperature hold times

✍ Scribed by David Gustafsson; Johan Moverare; Kjell Simonsson; Sten Johansson; Magnus Hörnqvist; Tomas Månsson; Sören Sjöström

Publisher: Elsevier
Year: 2011
Tongue: English
Weight: 335 KB
Volume: 10
Category: Article
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2011.04.469

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✦ Synopsis

Fatigue crack growth testing of Inconel 718 has been carried out at the temperatures 550°C and 650°C. The tests were conducted using a mix of hold times and pure cyclic loading, referred to as block tests. From the test results, the existence of an embrittled volume or damaged zone in the vicinity of the crack tip has been revealed. It has been found that the evolution of this damaged zone can be sufficiently well described using a power law function with an exponent n=0.25.