U. Sari, T. Kirindi
The influence of aging on the microstructure and mechanical properties of Cu-11.6wt%Al-3.9wt%Ni-2.5wt%Mn shape memory alloy (SMA) was studied by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometer, and differential scanning calorimeter (DSC). Experimental results show that bainite, Ȗ2, and α phase precipitates occur with the aging effect in the alloy. After aging at 300°C, the bainitic precipitates appear at the early stages of aging, while the precipitates of Ȗ2 phase are observed for a longer aging time. When the aging temperature increases, the bainite gradually evolves into Ȗ2 phase and equilibrium α phase (bcc) precipitates from the remaining parent phase. Thus, the bainite, Ȗ2, and α phases appear, while the martensite phase disappears progressively in the alloy. The bainitic precipitates decrease the reverse transformation temperature while the Ȗ2 phase precipitates increase these temperatures with a decrease of solute content in the retained parent phase. On the other hand, these precipitations cause an increasing in hardness of the alloy.
@article{89734b08-7081-4d2a-843e-ea320f7b8655,
title={Effects of aging on the microstructure of a Cu-Al-Ni-Mn shape memory alloy},
author={U. Sari and T. Kirindi},
year={2011},
language={en}
}TY - JOUR TI - Effects of aging on the microstructure of a Cu-Al-Ni-Mn shape memory alloy AU - U. Sari AU - T. Kirindi PY - 2011 LA - en ER -
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