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 ...

Crystallization processes are always accompanied by the emergence of multiple intermediate states, of which the structures and transition dynamics are far from clarity, since it is difficult to experimentally observe the microscopic pathway. To insight the structural evolution and the crystallization dynamics, we perform large-scale molecular dynamics simulations to investigate the time-depende...

Nanocrystalline powders of (Fe70Ni30)100 xMox (x = 1 to 4) were produced by high-energy (SPEX) mechanical alloying. Increasing the Mo content was found to stabilize the face-centered cubic phase in mechanically alloyed nanopowders. To obtain a single c-phase, a powdered sample was solution annealed in the c-phase field and water quenched. The Curie temperature, TC, of the alloys was lowered wit...

Recently, the additive manufacturing (AM) technology laser metal deposition (LMD) has gained a lot of attention for processing crack prone high temperature materials such as nickel-based superalloys or intermetallics. A feasibility study on LMD graded transition from binary ß-NiAl to Ni50Al42Ta8 is presented with aim show possibility ß-NiAl-based structures spatially resolved microstructure and...

Microstructure and compression properties of (Hf0.73Ta0.27)100-XMoX alloys, where X = 0, 5, 16, 21 30 at. %, are reported. The alloys were prepared by vacuum arc melting hot isostatically pressed at 207 MPa for 3 h 1400 °C. with 16 % Mo contained two phases, BCC HCP, while the alloy three BCC, HCP cubic Laves (C15). Hf73Ta27, Hf69Ta26Mo5 Hf61Ta23Mo16 experienced eutectoid transformation formati...