There is a indirect way. You can do a test of freezing microstructures at different temperatures(cooling fast, such as quenching into water). Under one temperature, most dislocations disappear where the temperature can be considered as the recovery temperature. If deformed microstructure of Cu-Al-Zn has lots of twins, it is possible there is not a recovery temperature because of continuous recovery behavior.
Image J software could be used for analytical studies.
Article Influence of various heat treatment procedures on the corros...
Dear Safwan al-qawabah;
The recovery temperature can be estimated from the stress-strain curve obtained during tensile testing of quenched specimens at room temperature.
The recovery temperature is about 65 ºC for the Cu-26%Zn-4%Al alloy wire. for the commercial SMA wire with the nominal composition Cu-25.3%Zn-4%Al and 0.9 mm diameter. The first transformation is detected as a smaller peak starting at Ms=41.9 ºC. as detailed in the references;
- https://www.scielo.br/j/mr/a/TPgDNQxbRCdcgrJksSCJjFB/?lang=en#
Article The mechanical behavior and shape memory recovery of Cu-Zn-Al alloys
The microstructures can be observed to indirectly determine the recovery temperature, such as crystal morphology, crystal size and so on.
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