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Local structure of TiNiCu(Hf) shape memory alloys: XAFS data analysis
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Alexander Yaroslavtsev
Published/Copyright:
September 15, 2010
Abstract
The extended X-ray absorption fine structure spectroscopy (EXAFS) was applied to investigate the local structure peculiarities of TiNi-based shape memory alloys Ti50Ni25Cu25 and Ti39.2Ni24.8Cu25Hf11. Our experimental results demonstrate that the most significant changes in local crystalline structure under martensitic transformation arise in the Ni–Cu sublattice. The static disordering of the Ti coordination shell is more significant for Ni than for Cu environment. Such a conclusion is consistent with the refined values of atomic ν-shifts from the planar center of symmetry in (010) layers which are greater for Ni atoms than for Cu.
Published Online: 2010-09-15
Published in Print: 2010-11
© by Oldenbourg Wissenschaftsverlag, Moscow, Germany
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