Fatigue Crack Growth Behavior of a Nickel-Base Super Alloy Inconel 718 Under Spectrum Loads.

Malipatil, SG and Majila, AN and Fernando, CD and Manjunatha, CM (2020) Fatigue Crack Growth Behavior of a Nickel-Base Super Alloy Inconel 718 Under Spectrum Loads. In: Lecture Notes in Mechanical Engineering.

Full text not available from this repository.
Official URL: https://link.springer.com/chapter/10.1007/978-981-...

Abstract

Fatigue crack growth behavior of a nickel-base super alloy Inconel 718 under a standard mini-FALSTAFF spectrum load sequence was determined experimentally. Fatigue tests were performed in a 100 KN servo-hydraulic test machine at RT and lab air atmosphere using Compact Tension, C(T) specimens. Triangular waveform at an average frequency of 5 Hz was employed in testing. The crack length was observed to increase with applied spectrum load blocks, slowly in the beginning and rapidly as the crack length increased further to fail after about 58 blocks of loading. Further, the crack growth behavior under spectrum load was predicted and compared with experimental results. For prediction purpose, constant amplitude (CA) fatigue crack growth rate (FCGR) data at different stress ratios was analyzed to derive a crack growth law based on a two-parameter crack driving force ΔK*. The crack extension per load block was estimated using this crack growth law. The predicted fatigue crack growth behavior was observed to be conservative and comparable with experimental results.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Fatigue crack growth, Ni-base super alloy, Spectrum loads, Driving force
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Mrs. Usha Kumari
Date Deposited: 23 Nov 2021 11:33
Last Modified: 23 Nov 2021 11:33
URI: http://nal-ir.nal.res.in/id/eprint/13470

Actions (login required)

View Item View Item