Abstract
The effect of Ar+ ion irradiation on structural and phase transformations in a 1461 alloy (Al–Li–Cu–Mg) subjected to megaplastic deformationhas has been studied by transmission electron microscopy. Short-term irradiation (E = 10 keV, F = 2 × 1016 cm−2) has been established to form a low-energy recrystallized submicrocrystalline structure at a depth (∼200 μm), significantly exceeding the projective ion ranges (∼10 nm). The study confirms the important role of the radiation-dynamic effect during the ion irradiation of metastable media. The structural and phase transformations take place in the alloy at a depth of much higher than the projective ion ranges and at a higher rate compared with traditional thermal annealing.
Highlights
Irradiation of ultrafine-grained and nanostructured materials with 10–40 keV gas ion beams enhances their structure and properties [1,2,3]
The effect of Ar+ ion irradiation on structural and phase transformations in a 1461 alloy (Al–Li–Cu–Mg) subjected to megaplastic deformationhas has been studied by transmission electron microscopy
The effect of argon ion irradiation on structural and phase transformations in the 1461 alloy (Al– 2.8Cu–1.8Li–0.66Zn–0.5Mg–0.08Zr–0.09Sc) subjected to megaplastic deformations has been studied in this work using transmission electron microscopy
Summary
Irradiation of ultrafine-grained and nanostructured materials with 10–40 keV gas ion beams enhances their structure and properties [1,2,3]. Accelerated ion-beam modification of Mo samples after severe plastic deformation by high pressure torsion, as well as the modification of bands of amorphous and nanocrystalline magnetically soft materials supports these results. It is of interest to study the ion bombardment effect on other materials to comprehensively analyze how to control nanocrystalline structure formation, in particular, the grain size and uniformity. The effect of argon ion irradiation on structural and phase transformations in the 1461 alloy (Al– 2.8Cu–1.8Li–0.66Zn–0.5Mg–0.08Zr–0.09Sc) subjected to megaplastic deformations has been studied in this work using transmission electron microscopy
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