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- Title
Influence of Cu Concentration on Structure, Mechanical Properties and Corrosion Resistance of Ti-Ni-Cu Shape Memory Alloy Ribbons.
- Authors
Kieu Xuan Hau; Nguyen Hai Yen; Nguyen Huy Ngoc; Truong Viet Anh; Pham Thi Thanh; Nguyen Van Toan; Nguyen Huy Dan
- Abstract
The paper presents the results of investigating the influence of Cu concentration on structure, mechanical properties and corrosion resistance of Ti50Ni50-xCux (x = 0, 5, 10, 15 and 20) alloy ribbons. The ribbons with a thickness of about 25µm were prepared by using meltspinning method with a tangential velocity of copper wheel of 40 m.s-1. All the ribbons reveal a single crystalline phase of (Ni,Cu)Ti with the martensitic-B19 structure at room temperature when Cu substitutes for Ni. The structural transformations temperature, tensile strain and elastic modulus increase with increasing Cu concentration whereas the hardness and dislocation density trendly decrease. The corrosion potential Ecorr in 3.5% NaCl aqueous solution increases from -0.67V (for x = 0) to -0.46V (for x = 20) indicating the better resistance against electrochemical corrosion by Cu addition.
- Subjects
COPPER; CORROSION resistance; CORROSION potential; DISLOCATION density; SHAPE memory alloys; ELECTROLYTIC corrosion
- Publication
Materials Transactions, 2023, Vol 64, Issue 4, p849
- ISSN
1345-9678
- Publication type
Article
- DOI
10.2320/matertrans.MT-M2022161