Nanocomposite films consisting of Fe nanocrystals (NCs) embedded in an amorphous Al2O3 matrix have been fabricated by alternate pulsed laser deposition in vacuum. The size, shape and distribution of the Fe NCs have been analysed by high resolution electron microscopy. The thermal stability of the films has been studied by in situ annealing in the electron microscope, and the chemical state of t...

Hybrid manufacturing (HM) Ti-6Al-4V components combining the advantages of forging and additive were achieved. The bonding zone HMed component joins substrate manufactured its α′-α/α′/αm-α/β heterogeneous microstructure was attributed to distinguishing cooling rate pseudo-isothermal annealing temperature. phase transformation mechanisms clarified with a numerical simulation model for thermal an...

In this paper, a non-isothermal two-phase flow in the cathode gas diffusion layer (GDL) of PEM fuel cell is modeled. The governing equations including energy, mass and momentum conservation equations are solved by numerical methods. Also, the optimal values of the effective parameters such as the electrodes porosity, gas diffusion layer (GDL) thickness and inlet relative humidity are calculated...

The paper shows the effect of homogenization annealing on ferromagnet-paramagnet phase transition in GdNi2 alloy. In cast sample, at Curie point, a temperature hysteresis is observed, which an external magnetic field 13.5 T can be least 3 degrees. data scanning electron microscopy electropolished samples showed decrease impurity GdNi and practically no annealed sample. value isothermal change e...

Guided by solution thermodynamic modeling coupled with detailed experimental characterization, the present study establishes that alternating FCC and BCC lamellar microstructure in Al0.7CoCrFeNi high entropy alloy, is a result of non-equilibrium partitionless solidification from liquid to single B2 phase, followed solid-state decomposition. Widmanstätten lamellae form allotriomorphic precipitat...

In-situ Neutron Diffraction and Small-Angle Scattering (SANS) are employed for the first time simultaneously in order to reveal interaction between austenite ferrite phase transformation precipitation kinetics during isothermal annealing at 650 700 °C three steels with different vanadium (V) carbon (C) concentrations. Austenite-to-ferrite is observed all both temperatures. The completed a 10 h ...

We present a multiscale study on the recovery and recrystallisation of heavily deformed (85% reduction in size) Fe–Si–Sn alloy using combination dark field X-ray microscopy (DFXM), synchrotron diffraction (SXRD) electron backscatter (EBSD). By utilizing DFXM, we focus grain within high stored energy (HSE) regions, track it through consecutive isothermal annealing steps. The intra-granular struc...

Abstract We present a multi-scale study of recrystallization annealing an 85% cold rolled Fe-3%Si-0.1%Sn alloy using combination dark field X-ray microscopy (DFXM), synchrotron diffraction (SXRD), and electron backscatter (EBSD). Grains interest from high stored energy (HSE) regions in 200μm-thick sample are studied DFXM during isothermal annealing. The intra-granular structure the as deformed ...