Structure and decomposition behavior of rapidly solidified Mg-Al-Zn-Nd

Do Hyang Kim, S. H. Kim, N. J. Kim

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Abstract

Microstructural changes in a rapidly solidified Mg-Al-Zn-Nd alloy during heat treatment at 100°C, 250°C, 350°C for 1hr and 24hrs have been investigated by using TEM, EDS, DSC, and X-ray diffraction analysis and hardness measurements. Asextruded Mg-Al-Zn-Nd alloy consists of 1 approx. 2 μm size fine grains, 10 approx. 50nm size Al2Nd particles and 0.1 approx. 0.3 μm size quasicrystal-related particles. No microstructural changes occur during heat treatment at 100°C and 250°C for 1hour and 24 hours. After heat treatment at 350°C, the Al2Nd particles are still stable, but the quasicrystal-related particles are replaced with Al11Nd3-related particles. The amount of hardness decrease after heat treatment at 350°C for 24 hours is only 10% of the hardness of the as-extruded material, which suggests the high thermal stability of the rapidly solidified Mg-Al-Zn-Nd alloy due to the relatively fine grain size and, particularly, due to the presence of thermally stable 50nm size Al2Nd particles.

Original languageEnglish
Pages435-447
Number of pages13
Publication statusPublished - 1995 Dec 1
EventProceedings of the 1995 124th TMS Annual Meeting - Las Vegas, NV, USA
Duration: 1995 Feb 131995 Feb 16

Other

OtherProceedings of the 1995 124th TMS Annual Meeting
CityLas Vegas, NV, USA
Period95/2/1395/2/16

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Kim, D. H., Kim, S. H., & Kim, N. J. (1995). Structure and decomposition behavior of rapidly solidified Mg-Al-Zn-Nd. 435-447. Paper presented at Proceedings of the 1995 124th TMS Annual Meeting, Las Vegas, NV, USA, .