Title

Improvement Of Aging Kinetics And Precipitate Size Refinement In Mg-Sn Alloys By Hafnium Additions

Keywords

Magnesium alloys; Micro-alloying; Precipitation; Transmission electron microscopy (TEM)

Abstract

Two Mg-Sn alloys were microalloyed by addition of Hafnium and their age-hardening response was studied at 200°C. Time to reach peak hardness was significantly reduced and improved by Hf addition. TEM study showed Hf clusters in the close vicinity and at the surface of Mg2Sn precipitates, which confirms that Hf clusters act as additional nucleation centers for Mg2Sn precipitate formation. Our results support the validity of thermokinetic criterion proposed by Mendis for selection of microalloying elements in order to refine precipitate size, accelerate aging kinetics and enhance peak hardness.

Publication Date

1-10-2016

Publication Title

Materials Science and Engineering A

Volume

651

Number of Pages

854-858

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.msea.2015.11.043

Socpus ID

84947770308 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84947770308

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