Influence of heat treatment temperature on recovery force spring used for actuator of heat engine

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ชวภณ ธนวัชณรงค์
อภินันท์ ภูเก้าล้วน
อนรรฆ ขันธะชวนะ


It is well known that if you would like to use shape memory alloy and apply to actuator, heat treatment must be required in order to activate shape memory alloy effect. The heat treatment has a direct effect on the mechanical properties of the shape memory alloy. This research therefore studied the influence of heat treatment temperature of nickel-titanium alloy spring. The wire with diameter 0.7 mm. was formed to be a spring at index 6.71 and heat treatment at 350, 400 and 450oC. After that, phase transformation temperature of the spring specimens was evaluated by differential scanning calorimeter (DSC) technique. Also, spring tension tests at 25 and 65oC were used to compare the influence of the heat treatment temperature. From the experiment, it is found that the most suitable spring to be applied for actuator of heat engine is the spring with maximum recovery force spring at 5.326 N by heat treatment at 350oC.


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ธนวัชณรงค์ ช., ภูเก้าล้วน อ., & ขันธะชวนะ อ. (2020). Influence of heat treatment temperature on recovery force spring used for actuator of heat engine. Journal of Energy and Environment Technology of Graduate School Siam Technology College, 6(2), 39–46. Retrieved from
Review Article


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