Receiving of Bimetallic Joints of TiNi-steel, TiNi-TiNi Using High-Speed Strain

Aksana Rubanik 1Vladimir Klubovich 1Vasili V. Rubanik 1Vasilii Rubanik Jr 2

1. Institute of Technical Acoustics, Ludnikova av., 13, Vitebsk 210023, Belarus
2. Vitebsk State Technological University, Moskovski Av., 72, Vitebsk 210035, Belarus

Abstract

From a technological point of view Nitinol is very difficult to join with dissimilar materials, especially stainless steel. At welding of Nitinol brittle intermetallic compounds (for example Ti2Ni3) are formed which considerably reduce joint strength.

In respect to technology of materials explosive welding is promising method for joining TiNi when influence of high temperatures is not enough and intermetallic phase at the interface practically does not present.

The use of high-speed strain allowed TiNi-steel joint, TiNi-TiNi to receive providing high thermoelastic and reflexive characteristics of the load-bearing elements operating on shape memory effect. At the expense of heat treatment selection it was possible to recover thermoelastic properties of TiNi alloys subjected to high-speed strain by explosive welding.

The microstructure studies of welded joints show high quality of the received bimetal; the weld joint has a wave character that is optimum from a technological point of view, taking into consideration subsequent mechanical and other kinds of treatments of the received half-finished products.

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Presentation: Poster at E-MRS Fall Meeting 2007, Symposium E, by Vasilii Rubanik Jr
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-15 00:50
Revised:   2009-06-07 00:44
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