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Elastic Properties of Low Density Core (LDC) Ti-6Al-4V Sandwich Cores

Published online by Cambridge University Press:  10 February 2011

D. T. Queheillalt ,
H. N. G. Wadley  and
D. S. Schwartz
D. T. Queheillalt
Affiliation:
IPM Laboratory, University of Virginia, Charlottesville, VA 22903, dtq2j@virginia.edu
H. N. G. Wadley
Affiliation:
IPM Laboratory, University of Virginia, Charlottesville, VA 22903, dtq2j@virginia.edu
D. S. Schwartz
Affiliation:
The Boeing Company, St. Louis, MO 63166-0516
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Abstract

Lightweight, structurally efficient low density core (LDC) sandwich structures can be produced by entrapping argon gas within a finely dispersed distribution of pores in a microstructure and using a high temperature anneal to cause pore growth by gas expansion. This results in a porous microstructure with a relative density as low as ∼0.70. Laser ultrasonic methods have been used to measure the longitudinal and shear wave velocities and hence the elastic properties of LDC Ti-6Al-4V cores prior to, and after gas expansion treatments of up to 48 hr at 920°C. The data was compared with several analytical models for predicting the volume fraction of porosity dependent elastic properties of porous materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 521: Symposium R – Porous & Cellular Materials for Structural Applications , 1998 , 237
Copyright
Copyright © Materials Research Society 1998

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