Inherent internal friction of Ti51Ni39Cu10 shape memory alloy
Journal
Materials Transactions
Journal Volume
48
Journal Issue
8
Pages
2143-2147
Date Issued
2007
Author(s)
Abstract
Ti51Ni39Cu10 SMA is more suitable than Ti50Ni50 SMA for use as a high damping alloy at room temperature because it has higher inherent internal friction and wider martensitic transformation temperature range. Experimental results show that tan δ values of both (IFPT+IFI)B2→B19 and (IFPT+IFI)B19→B19′, of Ti 51Ni39Cu10 SMA are linearly proportional to σ0/v1/2 when the applied v and σ0 are within 10Hz and 15μm, respectively. Since defects and dislocations pin the martensite twin boundaries and obstruct their mobility, it is important to prevent the introduction of defects or dislocations into the solution-treated Ti51Ni39Cu10 SMA to maintain its high inherent internal friction. © 2007 The Japan Institute of Metals.
Type
journal article