Journal
MECHANICS OF MATERIALS
Volume 104, Issue -, Pages 145-156Publisher
ELSEVIER
DOI: 10.1016/j.mechmat.2016.11.002
Keywords
Split Hopkinson pressure bars; MC2 single crystal; Cubic material; Viscoplasticity; Local Hill yield criterion; Transient dynamic; Signal analysis; Digital images correlation; High-speed impact; Turbine blade
Categories
Ask authors/readers for more resources
This paper presents experimental and numerical investigations on single crystal nickel base superalloy MC2. The purpose of this study is to efficiently predict the consequences of impacts on turbine blades within gas turbine engines. Dynamic compression tests on Split Hopkinson Pressure Bar (SHPB), performed at high temperature, have allowed the identification of anisotropic and viscoplastic material data. The effects of crystal orientation (< 1 0 0 >, < 1 1 0 > and < 1 1 1 >), temperature (25, 750 and 1000 degrees C) and strain rate (up to 610 s(-1)) on the compression yield strength and work hardening of MC2 single crystal have been examined. The LS-Dyna solver has been used to calibrate the parameters of a phenomenological behavior law based on a local Hill yield criterion. The results of simulations have been verified by comparison with a ballistic test on a monocrystalline plate, and on a turbine blade heated at 1000 degrees C. The measured residual deflections and strain fields are consistent with those obtained by calculation. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available