Open AccessA REVIEW OF MICROSTRUCTURE AND CORROSION BEHAVIOR OF CU AL NI SHAPE MEMORY ALLOY
Author(s) -
Nawal Mohammed Dawood
Publication year - 2020
Publication title -
the iraqi journal for mechanical and materials engineering/maǧallaẗ al-ʻirāqiyyaẗ li-l-handasaẗ al-mīkānīkiyyaẗ wa-handasaẗ al-mawādd
Language(s) - English
Resource type - Journals
eISSN - 2313-3783
pISSN - 1819-2076
DOI - 10.32852/iqjfmme.v20i4.530
Subject(s) - shape memory alloy , materials science , alloy , microstructure , hysteresis , metallurgy , corrosion , martensite , diffusionless transformation , phase (matter) , transformation (genetics) , work (physics) , thermodynamics , condensed matter physics , physics , biochemistry , chemistry , organic chemistry , gene
The shape memory alloys (SMAs), that consist of Cu-Al-Ni, have been established and developed for the applications used at higher temperature values due to their capability to return to its original shape when heating close to its transformation temperature. Cu-Al-Ni alloy has high value of transformation temperature and show small hysteresis as compared to the other types of SMAs. This work present a general review about how SMAs have developed by adding several metals such as, Ti, Be, B, Mn, and Zr or by changing its content (Ni or Al) by either decreasing or increasing. That might show a significant impact on the phase transition and enhancing the corrosion behavior and mechanical properties of the presented alloys. However, the transformation of the martensite phase is the critical factor that might change the properties of Cu-Al-Ni SMAs. This phase is largely affected by addition of the alloying element mentioned above. A review about effect of addition some alloying elements for enhancing the corrosion characteristics of the alloy and phase transition is presented.