2次加工を施したTiNi形状記憶合金焼結体の曲げ疲労特性

DOI Web Site

書誌事項

タイトル別名
  • Bending Fatigue Property for Sintered TiNi Shape Memory Alloy Subjected to Secondary Working

抄録

<p>Shape memory alloys are attracting attention as an intelligent material. In this study, we propose a functionally-graded TiNi shape memory alloy fabricated using combination of powder metallurgy and secondary working. This advanced material can be utilized as a medical guidewire exhibiting a bending rigidity varying from low to high along the axial direction and a driving element that performs the functions of both a temperature sensor and an actuator. The powder metallurgy process can easily control the composition ratio of Ti and Ni. The materials fabricated using the powder metallurgy process are generally not used severe deformation conditions because of their poor ductility. However, the materials that can withstand such deformation conditions must be considered, especially for developing a medical guidewire from sintered TiNi shape memory alloy. This study aims to clarify the relation between the secondary working conditions and fatigue properties of the sintered TiNi shape memory alloy. Further, we present the effects of secondary working on the fatigue properties of the alternating-plane mode of the material. The fatigue lives of all the sintered material were shorter than that of the wrought material, however, those of the materials subjected to the secondary working under appropriate conditions are improved. This may be mainly caused by an increase in the density because of the rolling.</p>

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ