HRTEM Observation of Early Stage of Precipitation in Mg-Gd-Y Alloys

Daisuke Nakagawa; Tokimasa Kawabata; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/AMR.409.350

Paper Titles

Discontinuous and Continuous Precipitation during Aging in Mg-Al System Alloys
p.329

HRTEM Observation of the Age Hardening Precipitates in Mg-Gd-Sc Alloys, with Different Gd Concentrations
p.335

Microstructure Observation of AM60 Magnesium Alloy Solidified by Rapidly Quench
p.339

The Development of Novel Textures in Rare Earth Element Containing Magnesium Alloys
p.343

HRTEM Observation of Early Stage of Precipitation in Mg-Gd-Y Alloys
p.350

Effect of Zn Content on Aging Behavior of Binary Mg-Zn Alloys
p.354

Effect of Zn Contents on Microstructure in AZ-Series Magnesium Alloys
p.358

Evolution of as-Cast Microstructure of Mg-Al Alloys with Solute Content and Cooling Rate
p.362

Electrochemical Behavior of Mg-6mass%Al Alloy Corroded in Na₂SO₄ and NaCl Solutions
p.368

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HRTEM Observation of Early Stage of Precipitation in Mg-Gd-Y Alloys

Abstract:

HRTEM observation was performed to clarify the early stage of precipitation in Mg-Gd-Y alloy aged at 473 K. The hardness increased with increasing aging time after quenching. The hardness increased slowly at early stage of aging, increased rapidly, and then reached to peak hardness. At as-quenching and the early stage of aging, the weak spots appeared at a half 100_Mg in SAED pattern. The intensity of these weak spots changed to higher with increasing aging time. Monolayers on {100}_Mg planes and β” phase existed at this aging stage. Monolayers, β” phase, the precipitates with five layers corresponding the feature of (020)_β’ plane and β’ phase co-existed after the rapidly increasing of hardness. In the peak aged specimen at 473 K, both of β” and β’ phases co-existed and β’ phase were formed dominantly.

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Periodical:

Advanced Materials Research (Volume 409)

Pages:

350-353

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.409.350

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Online since:

November 2011

Authors:

Daisuke Nakagawa, Tokimasa Kawabata, Kenji Matsuda, Susumu Ikeno

Keywords:

Mg-Re Alloy, Transmission Electron Microscopy (TEM)

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