Y. Yoshimi, Yoshimi inc., Obu, Japan; K. Kitamura, Aichi University of Education, Kariya, Japan; M. Tokuda, T. Asai, Mie University, Mie, Japan; T. Inaba, Mie University, Tsu, Japan; Y. Watanabe, TOYO SEIKO CO.,LTD., Yatomi, Japan
In order for us to overcome difficulties that have hindered precision casting of shape memory alloys, we have decided to use ingots created with Self Combustion High Temperature Synthetic Method (SHS) which eventually led us to the success of precision casting utilizing lost wax process. Also we have succeeded in creating functional products which are treated with the ultrasonic shotpeening process, improving the resiliency against deformation. Although the common casting products are created using many different kinds of metals and alloys, casting products utilizing shape memory alloys have not been widely adopted due to a lack of successfully produced products. The reasons for this are that there was much difficulty in developing equal property structures that does not allow gravity segregation of Ni-Ti. Also its essential characteristics being the shape memory and super elasticity, the makeup of component had to overcome the structural weaknesses in order to withstand from possible deformation.
Summary: In order for us to overcome difficulties that have hindered precision casting of shape memory alloys, we have decided to use ingots created with Self Combustion High Temperature Synthetic Method (SHS) which eventually led us to the success of precision casting utilizing lost wax process. Also we have succeeded in creating functional products which are treated with the ultrasonic shotpeening process, improving the resiliency against deformation.
