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Monotonic Testing and Tension-Tension Fatigue Testing of Free-standing Al Microtensile Beams

Published online by Cambridge University Press:  01 February 2011

Nicholas Barbosa III ,
Paul El-Deiry  and
Richard P. Vinci
Nicholas Barbosa III
Affiliation:
Lehigh University- Department of Materials Science and Engineering, Bethlehem, PA
Paul El-Deiry
Affiliation:
Lehigh University- Department of Materials Science and Engineering, Bethlehem, PA
Richard P. Vinci
Affiliation:
Lehigh University- Department of Materials Science and Engineering, Bethlehem, PA
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Abstract

Free-standing Al thin films were loaded statically and dynamically through the use of a custom-built microtensile system. The system is capable of performing monotonic loading/unloading up to 50 μm/s (10-1/s) and tension-tension fatigue experiments at 100 Hz on 600 μm long, 100 μm wide, and 1 μm thick free-standing Al microtensile beams. Monotonic loading/unloading and stress relaxation experiments have been performed. The microtensile beams show plasticity as well as a relaxation dependence on strain rate and stress level. Displacement controlled tension-tension fatigue experiments have also been performed. A trend of decreasing cycles to failure with increasing displacement amplitude and increasing mean displacement has been noted but requires further experimental exploration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 795: Symposium U – Thin Films - Stresses and Mechanical Properties X , 2003 , U11.39
Copyright
Copyright © Materials Research Society 2004

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References

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