Accessible Requires Authentication Published by De Gruyter February 23, 2021

Phase transformations and microstructural evolution in nanocrystalline Fe71B23Nb6 alloy prepared by mechanical alloying

Mahmoud Chemingui, Chahida Mnasri, Christelle Nivot, Arnaud Tricoteaux, Yannick Lorgouilloux and Mohamed Dammak

Abstract

A new nanocrystalline Fe71B23Nb6 alloy powder was prepared by mechanical alloying. The phase transformation and morphological and microstructural properties of the as-prepared alloy were investigated by scanning electron microscopy, laser granulometry, and X-ray diffraction with respect to the milling time (0- 200 h). During the milling process, it was observed that the dissolution of Nb and B atoms into the Fe matrix formed solid solutions of Fe (Nb), Fe (B), Fe23B6, Fe2B, and Fe (Nb, B). Moreover, the insertion of B atoms into the Nb network generated the Nb (B) phase. Furthermore, the minimum crystallite size was measured as approximately 1 nanometer. In addition, the dislocation density gradually increased with the extension of the milling time, and the crystallization of the partially amorphous phase occurred after 200 h of milling.

Published Online: 2021-02-23
Published in Print: 2020-04-01

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