Application of Isothermal Upset for Megaplastic Deformation of Cu–Al–Ni β Alloys

Cu–14 wt% Al–4 wt% Ni alloy demonstrating the shape memory effect has been subjected to plastic deformation by means of uniaxial compression (upset). The process has been controlled by measuring the strain rate, applied stress, and compression ratio of standard specimens under isothermal conditions...

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Bibliographic Details
Published in:Technical physics 2020-07, Vol.65 (7), p.1044-1050
Main Authors: Svirid, A. E., Lukyanov, A. V., Pushin, V. G., Kuranova, N. N., Makarov, V. V., Pushin, A. V., Uksusnikov, A. N.
Format: Article
Language:English
Subjects:
Alloys
Classical and Continuum Physics
Compression ratio
Compression tests
Copper
Deformation effects
Dynamic recrystallization
Mechanical tests
Nickel
Physics
Physics and Astronomy
Plastic deformation
Shape effects
Shape memory alloys
Solid State
Strain rate
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Summary:Cu–14 wt% Al–4 wt% Ni alloy demonstrating the shape memory effect has been subjected to plastic deformation by means of uniaxial compression (upset). The process has been controlled by measuring the strain rate, applied stress, and compression ratio of standard specimens under isothermal conditions in the interval 400–600°C. Structural modifications in the alloy after mechanical tests have been studied by optical, scanning, and transmission microscopy methods and using X-ray phase analysis. It has been found that grains in the alloy became much finer (from 1 mm to 100 μm across) and its strength and ductility improved owing to dynamic recrystallization.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784220070245