G - Physics – 01 – N
Patent
G - Physics
01
N
349/35
G01N 29/00 (2006.01) G01N 29/07 (2006.01)
Patent
CA 1264196
TITLE A METHOD OF, AND AN APPARATUS FOR, EVALUATING FORMING CAPABILITIES OF SOLID PLATE INVENTORS Jean F. Bussière Cheng K. Jen Irina D. Makarow Brigitte Bacroix Philippe H. Lequeu John J. Jonas ABSTRACT OF THE DISCLOSURE A method of, and apparatus for, evaluating forming capabilities of metal plate by means of ultrasonic waves where the rolling direction and the density of the plate are known. The method comprises the steps of launching acoustic waves into the plate and detecting acoustic waves propagating in the plate to establish acoustic velocities in the plate along at least two different directions. Then the value of a certain plastic strain characteristic, like the average plastic strain ratio R or the planar strain ratio .DELTA.R, is determined from a previously esta- blished empirical relationship between the velocities and the value of the plastic strain ratio R(.alpha.).
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Bacroix Brigitte
Bussiere Jean F.
Jen Cheng-Kuei
Jonas John J.
Lequeu Philippe H.
Bacroix Brigitte
Bussiere Jean F.
Jen Cheng-Kuei
Jonas John J.
Lequeu Philippe H.
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