Effect of testing temperature from cryogenic to high temperatures on dynamic fracture properties in 5083 aluminum alloy

Akihiro Takahashi, Toshiro Kobayashi, Hiroyuki Toda, Tohru Mizutani

研究成果: Contribution to journalArticle

抜粋

Effect of temperature on mechanical properties of an 5083 aluminum alloy has been investigated for various testing temperatures from 10 to 773 K. For that purpose, the static tensile, dynamic fracture toughness test and fractography are carried out, and stop block method is employed to characterize fracture behavior at cryogenic temperatures. Mechanical properties such as 0.2% proof stress and ultimate tensile strength increase with decreasing temperature. The high temperature embrittlement, which has been often reported for 5000 series alloys having high Mg content, was not observed in the present study. The dynamic fracture toughness value, Jd, and dynamic crack extension toughness, Tmat, at 20 K are approximately 57% and 74% lower than that at 150 K, respectively. Fracture toughness at cryogenic temperatures shows strong dependence on formation of delamination cracks. The delamination cracks are initiated at grain boundaries. According to a SEM-EDX analysis, Mg is detected adjacent to the delamination cracks. Therefore, it is concluded that the formation of delamination cracks are concerned with β(Al3Mg2) phase at the grain boundaries.

元の言語英語
ページ(範囲)386-391
ページ数6
ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
50
発行部数8
DOI
出版物ステータス出版済み - 8 2000
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

フィンガープリント Effect of testing temperature from cryogenic to high temperatures on dynamic fracture properties in 5083 aluminum alloy' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用