Abstract
The relationship of force versus cross-head travel for a carefully defined displacement history is commonly used in uniaxial tension tests to evaluate rate sensitive properties of superplastic alloys. The underlying objective is to maintain the strain-rate constant throughout the gauge section of the test specimen. However, finite element simulations of common superplastic tensile specimens predict that actual strain-rates may vary as much as 40% from the uniform value. This trend was experimentally confirmed for a 5083 aluminum alloy by performing a series of interrupted tensile tests. A correlation between experimental and finite element results was made and an improved specimen geometry is presented for uniaxial tests.
Original language | English |
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Pages (from-to) | 627-632 |
Number of pages | 6 |
Journal | Materials Science Forum |
Volume | 170-172 |
DOIs | |
State | Published - 1994 |
Externally published | Yes |
Event | Proceedings of the 1994 International Conference on Superplasticity in Advanced Materials (ICSAM-94) - Moscow, Russia Duration: May 24 1994 → May 26 1994 |