|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Functional, Energy, and Magnetic Materials
||Effect of Processing Parameters on Thermal Cyclic Stability of Nitinol Alloys Manufactured by Selective Laser Melting
||Jianing Zhu, Evgenii Borisov, Johan Bijleveld, Eduard Farber, Marcel Hermans, Vera Popovich
|On-Site Speaker (Planned)
There is a growing demand in using additive manufacturing (AM) for production of smart components capable to respond to thermal and mechanical stimuli. In this study phase transformation behavior of equiatomic Nitinol alloy manufactured by selective laser melting (SLM) was investigated by differential scanning calorimetry (DSC) in the temperature range of -70 oC to 200 oC. Thermal cycling associated with functional fatigue was performed in order to characterize the phase transformation stability. Phase transformation temperatures of SLM Nitinol alloys were found to decrease with increasing number of cycles. The effect of SLM process parameters was further investigated to improve the phase transformation stability. The optimized samples featuring improved functional stability were found to be attributed to their fine-grained structure and pre-existing nano-scale precipitates. Hence, this work demonstrates that thermal cycling stability of SLM Nitinol alloys can be successfully tailored by changing AM processing parameters.