Transactions of Materials and Heat Treatment

Title：Study on fabrication technology of shape memory alloy TiNi foils

Authors： ZHOU Tao ZHOU Cheng HE Liang XIE Xiao-chang XIE Jian-xin(School of Materials Science and Engineering Beijing University of Science and Technology Beijing 100083 China)

Unit：

KeyWords： cold-rolling TiNi compounded foils alloy foils

ClassificationCode：TG139.6

year,vol(issue):pagenumber：2007,32(3):50-53

Abstract：

Thin foils of TiNi shape memory alloy with the thickness less than 0.1mm were hard to be produced by traditional technology due to the poor mechanical working properties of the alloy.However,both pure Ti and Ni have good working properties.So these two metals could be used to prepare TiNi composition,which followed by TiNi alloy through diffusing heat treatment.In this paper,thin foils of TiNi shape memory alloy with the of thickness 50 μm were produced by the technology made by three stages of hot-pressing,cold-rolling and heat-treatment.In order to make cold-rolling successfully,the multi-layers after hot-pressing should have enough combine-intensity.The optimal parameters of hot-pressing were as follows: vacuum: 1×10-2 Pa,press: 5 MPa,temperature: 750 ℃,heat holding time: 15 min.The reduction of the first pass should be more than 30% to make sure the sample would not become cracked during cold-rolling.The compounded foils were finally produced to be TiNi shape memory alloys after being heated in vacuum with the temperature up to 950 ℃ for 60 min.But the quality of the foil surface should be improved later.

Funds：

国家自然科学基金资助项目(50171007)

Reference：

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