To evaluate a Ni-43.5wt%Ti alloy as a new alloy for cast clasp, the fatigue properties of its castings were examined and compared with those of Co-Cr and Type IV Au alloys castings. The Ni-Ti alloy was cast into a phosphate-bonded investment mold using an argon-arc melting and pressure casting machine. The Ni-Ti alloy castings showed superelasticity in bending tests. Fatigue tests were carried ...

Laser powder bed fusion is a promising additive manufacturing technique for the fabrication of NiTi shape memory alloy parts with complex geometries that are otherwise difficult to fabricate through traditional processing methods. The particularly attractive biomedical applications alloys, such as stents, implants, and dental surgical devices, where primarily superelastic effect exploited. Howe...

Ti-Nb-based Gum Metals exhibit extraordinary superelasticity with ultralow elastic modulus, superior strength and ductility, and a peculiar dislocation-free deformation behavior, most of which challenge existing theories of crystal strength. Additionally, this kind of alloys actually displays even more anomalous mechanical properties, such as the non-linear superelastic behavior, accompanied by...

The preparation of Ni-Mn-Ga and Ni-Mn-Ga-Fe master alloy ingots microwires was completed by high vacuum electric furnace melt melting drawing liquid forming equipment, the lattice dislocations defects formed inside during process were corrected stepwise ordered heat treatment. micro-structure phase structure characterized using a SEM field emission scanning electron microscopy an XRD diffractom...

We characterize the role of coherent nanoscale B2 Ni50Al50 precipitates on temperature- and stress-induced martensitic phase transformation in nanocrystalline Ni63Al37 shape memory alloys using multi-million-atoms molecular dynamics (MD) simulations. studied two types precipitates: one with single crystal (SXP) a second where grain boundaries cut through (PXP). Simulations reveal that presence ...