Title

Is There A Hexagonal-Close-Packed (Hcp) → Face-Centered-Cubic (Fcc) Allotropic Transformation In Mechanically Milled Group Ivb Elements?

Abstract

Allotropie hexagonal-close-packed (hcp) → face-centered-cubic (fee) transformations were reported in Group IVB elements titanium (Ti), zirconium (Zr), and hafnium (Hf) subjected to mechanical milling in a high-energy SPEX shaker mill. Although the transformation was observed in powders milled under regular conditions, no such phase transformation was observed when the powders were milled in an ultrahigh purity environment by placing the powder in a milling container under a high-purity argon atmosphere, which was in turn placed in an argon-filled glove box for milling. From a critical analysis of the results, it was concluded that the hcp →fcc phase transformation was, at least partially, due to pick-up of interstitial impurities by the powder during milling of these powders to the nanocrystalline state. © 2009 Materials Research Society.

Publication Date

11-1-2009

Publication Title

Journal of Materials Research

Volume

24

Issue

11

Number of Pages

3454-3461

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1557/jmr.2009.0423

Socpus ID

70450141251 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/70450141251

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