|About this Abstract
||Materials Science & Technology 2019
||Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
||Optimization of Process Parameters for Additive Manufacturing of High Temperature Shape Memory Alloys
||Mohammadreza Nematollahi, Guher P. Toker, S. Ehsan Saghaian, Keyvan Safaei baghbaderani, Othmane Benafan, Haluk E. Karaca, Mohammad Elahinia
|On-Site Speaker (Planned)
Low transformation temperatures of binary shape memory alloys restrain their use in applications where elevated temperatures are needed. Hf addition can significantly alter the TTs. Wrought processes have been successfully used to produce this alloy, but difficulties in processing and machining of NiTiHf alloys have limited production of complex geometries. This paper aims to use additive manufacturing techniques to 3D-print NiTiHf to overcome the manufacturing challenges. Coupons of NiTiHf were fabricated through a powder bed machine and effect of different process parameters on multiple build factors are discussed. By altering PPs near dense parts were fabricated without any cracks. Multiple aspects are considered for the fabrication evaluation and it is shown that each PP may affect one of the characteristics dominantly. Multiple ranges of TTs were achieved which positions AM techniques as a tailoring method to adjust shape memory behavior. Furthermore, thermomechanical behavior of AM NiTiHf will be discussed.