Characterisation of microstructure of isothermal martensite in Fe–23Ni–3.8Mn by Rietveld method

Microstructure characterization of nanocrystalline Ni3C synthesized by high-energy ball milling

“…In addition to structural and microstructural characterizations, the Rietveld method is also one of the best tools for quantitative estimation of amorphous and crystalline phases present in a multiphase system and the method was successfully applied for the determination of quantitative phase abundances of the composite materials [20,21,[27][28][29]. In the present study the relative abundances of Ni, graphite and Ni 3 C phases have been made by the Rietveld method of analysis.…”

“…Microstructure characterization of the prepared materials in terms of several lattice imperfection parameters has been made employing both the modified Warren-Averbach's [18,20,21] method of line profile analysis [WAMLPA] and Rietveld's structure refinement method [22][23][24][25]. To minimize the error in the estimation of correct background of overlapping reflections (truncation error), a more reliable and widely used method of profile fitting has been adopted in WAMLPA [26].…”

“…lattice strain etc. employing both Warren-Averbach's method [18,20,21] of line profile analysis (WAMLPA) and Rietveld's structure refinement method [22][23][24][25]. Some of the structural and microstructural features like Ni 3 C phase formation, core-shell structure, particle size, stacking faults has been evidenced in high-resolution transmission electron microscopy (HRTEM) images.…”

Microstructure and mechanical properties of carbon nanotubes reinforced aluminum matrix composites synthesized via equal-channel angular pressing

“…This demonstrates the suitability of the Bc route to achieve a very high strains resulting in substantial grain refinement [91]. Occurrence of sub-grains in the structure with high angle inside the original grain demonstrates that primarily the grain refinement in the structure follows the theory of dislocation cell walls leading to the creation of new grain boundaries out of the dislocation cell walls [92]. These grains oriented close to the original parent grains and they can always be found as a group like the one at the bottom of Fig.…”

Formation of Molecular Wires by Nanospace Polymerization of a Diacetylene Derivative Induced with a Scanning Tunneling Microscope at a Solid-Liquid Interface

“…The present experimental study on low temperature isothermal martensitic transformation primarily concerns alloy composition Fe-23Ni-3.6Mn and forms a part of our recent programme 1,2) of microstructural characterisation of the martensites induced in Fe-Ni-Mn alloy system with Mn composition varying between 3 to 4 mass%. Earlier studies on morphology, crystallography, and transformation kinetics [3][4][5] by transmission electron microscopy (TEM) have revealed that transformation kinetics are very sensitive within this range of Mn concentration in this alloy system.…”