Transformation of the TiNi Alloy Microstructure and the Mechanical Properties Caused by Repeated B2-B190’ Martensitic Transformations
来源期刊：Acta Metallurgica Sinica2015年第10期
论文作者：Anna Churakova Dmitry Gunderov Alexander Lukyanov Niklas Nollmann
文章页码：1230 - 1237
摘 要：The influences of thermal cycling treatment in the temperature range of B2-B19 martensitic transformations（-150 to 150 °C） on the Ti Ni alloy structure and properties were studied. Different states named the initial coarse-grained（CG） state, the ultrafine-grained（UFG） state after ECAP（with a grain size of 200 nm）, the state after ECAP and cold upsetting by 30% were considered. The results show that the microhardness and the strength increase in all the three states.According to the XRD analysis, a more significant increment in the dislocation density, resulting from thermal cycling, is observed in the UFG alloy than in the CG alloy.
Anna Churakova1,2，Dmitry Gunderov1,2，Alexander Lukyanov2，Niklas Nollmann3
1. Institute of Molecule and Crystal Physics RAS2. Ufa State Aviation Technical University3. Institute of Materials Physics, University of Münster
摘 要：The influences of thermal cycling treatment in the temperature range of B2-B19 martensitic transformations（-150 to 150 °C） on the Ti Ni alloy structure and properties were studied. Different states named the initial coarse-grained（CG） state, the ultrafine-grained（UFG） state after ECAP（with a grain size of 200 nm）, the state after ECAP and cold upsetting by 30% were considered. The results show that the microhardness and the strength increase in all the three states.According to the XRD analysis, a more significant increment in the dislocation density, resulting from thermal cycling, is observed in the UFG alloy than in the CG alloy.
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