Surface Improvement of Magnesium Alloy Using Mechanically Alloyed Powder-Bonding by Compressive Deformation-

• Yuasa Eiji

  Dept. Mech., Fac. Eng., Musashi Institute of Technology

• Sagawa Hiroaki

  Musashi Institute of Technology

• Oki Yoshinari

  SANKYO Aluminum Ind. Co. Ltd.

Bibliographic Information

Other Title

• メカニカルアロイング粉末を用いたマグネシウム合金の表面改質―圧縮変形による接合―
• メカニカルアロイング フンマツ オ モチイタ マグネシウム ゴウキン ノ ヒョウメン カイシツ アッシュク ヘンケイ ニ ヨル セツゴウ

Abstract

Atomized aluminum powder was mixed to magnesium alloy (AZ31) machined chips to realize the final composition of Mg-12, 40 and 61.5 mol% Al. Then the powder mixtures were mechanically alloyed (MA) for 54 ks. For the surface improvements of the magnesium alloy, the obtained MA powders were stacked on magnesium alloy (AZ31B) rod as the substratum, and they were bonded by hot-compressive deformation at various temperatures. After the bonding of Mg-12 mol% Al MA powder to AZ31B substratum at 673 K over, Mg₁₇Al₁₂ phase precipitates from super-saturated α-Mg in the bonded alloy layer. The structure of the bonded Mg-40 mol% Al MA alloy layer changes from Mg₁₇Al₁₂ single phase to Mg₁₇Al₁₂ and Mg₃Al₂ double phases. In the case of Mg-61.5 mol% Al MA powder, the amorphous phase formed by MA crystallizes to Mg₂Al₃ and MgAl phases. The hardness in the MA alloy layer becomes to higher than as-MA powder particles after the bonding. If the MA powder bonds to AZ31 alloy substratum at high temperature by the compressive deformation, the gradient of Mg and Al concentrations forms in the bonding interface by diffusion phenomenon with low activation energy.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 52 (11), 800-804, 2005

  Japan Society of Powder and Powder Metallurgy

Keywords

• mechanical alloying
• magnesium alloy
• compressive deformation
• precipitation hardening
• diffusion bonding

Details

• CRID: 1390001206308779776
• NII Article ID: 130000056246
• NII Article ID: 30021673775
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.52.800
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 7733969
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7733969
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed