Laser welded superelastic Cu–Al–Mn shape memory alloy wires

Laser welding of Cu-Al-Be shape memory alloys: Microstructure and mechanical properties

“…4), with respectively 321.6 ± 2 HV and 324.5 ± 3 HV. This is in agreement with previous works performed on other laser welding of Cu-Al-based alloys where no significant hardness changes were found between the fusion zone and the base material [17,20].…”

“…The higher fracture strain of the welds is probably due to fact that with the refined grain structure of the fusion zone any crack that initiates there will not propagate straightforward along the wire diameter (as it would occur in the single crystal base material), hence allowing the material to deform more. It is interesting to note that the overall tensile properties of the welded joints do not differ significantly from those of the base material, which appears to be a common feature for welded joints of Cu-based shape memory alloys (CuAlMn) [17] but not for NiTi [15,[29][30][31], which is the most studied shape memory alloy.…”

“…Laser welding is the most used technique to join shape memory alloys [15,16]. This technique has been already successfully employed to preserve the functional properties in similar and dissimilar joints of Cubased shape memory alloys, namely CuAlMn [17,18] and CuAlZn [19]. Furthermore, post-weld processing of the laser welded joint can improve the mechanical properties of the material [20].…”

Production of Al/NiTi composites by friction stir welding assisted by electrical current

“…%) ribbons, with a cross section of 2.8 × 0.9 mm 2 were used as reinforcements with the same length. Table 1 depicts the properties of superelastic NiTi [18]. Prior to welding, both materials were mechanical and chemically cleaned to remove grease and oxides.…”

Annealing effects on the structural and magnetic properties of off-stoichiometric Fe-Mn-Ga ferromagnetic shape memory alloys

“…The shape memory effect that is based on those integrated transformations thus becomes controllable, and it makes FSMAs viable for potential applications as actuators, sensors and electromagnetic devices. Since a large magnetically induced strain was confirmed in Ni 2 MnGa alloys [1,2], extensive studies have been conducted in developing new ferromagnetic shape memory alloys, such as Ni 2 FeGa [3,4], Co 2 NiGa [5,6], CuAlMn [7,8] and Fe 2 MnGa [9,10] alloys.…”