The effects of substituting B for Cu on the magnetic and shape memory properties of CuAlMnB alloys

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2016-07, Vol.122 (7), p.1-8, Article 687
• Main Authors: Aydogdu, Y., Turabi, A. S., Aydogdu, A., Vance, E. D., Kok, M., Kirat, G., Karaca, H. E.
• Format: Article
• Language: English
• Subjects: Alloying additive; Characterization and Evaluation of Materials; Condensed Matter Physics; Ductility; Machines; Magnetization; Manufacturing; Martensitic transformations; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Recoverable strain; Saturation (magnetic); Shape memory alloys; Superelasticity; Surfaces and Interfaces; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-016-0222-5

The effects of B addition on the magnetization, mechanical and shape memory properties in Cu 70− x Al 24 Mn 6 B x at.% ( x  = 0, 1, 2, 3, 4) alloys have been investigated. The ductility was decreased, while the strength was improved with B addition. Transformation temperatures were increased with B content due to increased e / a ratio. Martensite start temperature of B-free CuAlMn was found to be 37.3 °C and increased to 218.8 °C with 4 % B addition. B-free CuAlMn exhibited shape memory effect with a recoverable strain of 2.25 % under 200 MPa and a perfect superelasticity with a recoverable strain of 2.5 % at 163 °C. B addition degraded the shape memory properties and eventually resulted in the lack of recoverable strain. In addition, saturation magnetization was increased with B content. Moreover, the addition of B slightly decreased the ductility of the alloy. It was found that the magnetization, mechanical and shape memory properties CuAlMn alloys can be tailored by quaternary alloying with B.