Mathematical simulation of pressing X-ray lenses from nanocrystalline beryllium
Abstract
A computer model is developed to describe the pressing of a beryllium lens using the Deform software package. This model takes into account the rheological properties of beryllium and the deforming tool. The state of stress of a workpiece is determined at various stages of pressing, and the probability of fracture of nanocrystalline beryllium is estimated using the normalized Cockcroft-Latham criterion. The temperature dependence of the limiting values of the fracture criterion is found and used to choose the pressing conditions that exclude fracture of lenses.
- Publication:
-
Russian Metallurgy
- Pub Date:
- October 2016
- DOI:
- 10.1134/S0036029516100128
- Bibcode:
- 2016RuMet2016..966M
- Keywords:
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- nanocrystalline beryllium;
- X-ray lenses;
- Cocroft-Latham fracture criterion