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Crystallographic Texture and Yield Behavior of Al-Cu-Li (2195) Plate

Published online by Cambridge University Press:  15 February 2011

K.E. Crosby ,
R.A. Mirshams  and
S.S. Pang
K.E. Crosby
Affiliation:
Mech. Engr. Dept., Louisiana State University, Baton Rouge, LA 70803, kcrosby@lsu.edu
R.A. Mirshams
Affiliation:
Mech. Engr. Dept., Southern University, Baton Rouge, LA 70813
S.S. Pang
Affiliation:
Mech. Engr. Dept., Louisiana State University, Baton Rouge, LA 70803
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Abstract

Existing experimental texture analysis capabilities allow testing of theories on plasticity using polycrystal models. Aluminum-lithium alloys, which are particularly suited for aerospace applications due to excellent strength to weight ratio, typically possess pronounced texture. Al- Cu-Li (2195) thick plates were deformed by cold rolling to various thickness reductions. The plates exhibit a texture gradient through the plate thickness accompanied by a variation in yield strength values. The difference in yield strength values is related to the texture variation in terms of the texture components (ideal crystallographic orientations) identified from experimental measurements. A modified Taylor-based polycrystal plasticity model developed by Kocks and his colleagues is used to predict yield surfaces by incorporating texture data. Results of this investigation show that the texture intensities measured at certain ideal orientations increase or decrease with increasing deformation. These textural changes influence the value and anisotropy of the yield strength of the alloy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 439
Copyright
Copyright © Materials Research Society 2000

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References

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