Pseudoelastic Behavior of Boron-Doped $$\beta_{1}$$-Type Cu-Al-Be Shape Memory Alloys
| Autor: | T. Kalinga, Subhaschandra Kattimani, S. M. Murigendrappa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Transgranular fracture 02 engineering and technology Shape-memory alloy 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences Pseudoelasticity Ultimate tensile strength General Materials Science Grain boundary Crystallite Composite material 0210 nano-technology Ductility |
| Zdroj: | Journal of Materials Engineering and Performance. 30:6068-6078 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-021-05825-x |
| Popis: | This paper examines the influence of 0-0.2 wt.%B-doping on the microstructure, mechanical properties, and pseudoelastic behavior of Cu-Al11.5-Be0.57 shape memory alloys (SMAs). This microstructure study reveals that the addition of boron leads to significant grain refinement in $$\beta_{1}$$ -type polycrystalline Cu-Al-Be SMAs. A maximum refinement size of 50 µm was achieved with the addition of 0.15 wt.%B. The fine-grained (Cu-Al11.5-Be0.57)-B0.15 SMA with serrated grain boundaries exhibited the maximum enhancement of ultimate tensile strength, 744.65 ± 29.34 MPa, and ductility of 21.93 ± 0.56%. The fracture morphology revealed the transformation of intergranular to transgranular fracture in the SMAs with boron-doping. Maximum pseudoelasticity of 4% was achieved in the SMA with 0.15 wt.%B and suits as a damper in seismic applications. |
| Databáze: | OpenAIRE |
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