Granular deformation mechanisms in semi-solid alloys

C. M. Gourlay, A. K. Dahle, T. Nagira, N. Nakatsuka, K. Nogita, K. Uesugi, H. Yasuda

研究成果: Contribution to journalArticle査読

76 被引用数 (Scopus)

抄録

Deformation mechanisms in equiaxed, partially solid Al-15 wt.% Cu are studied in situ by coupling shear-cell experiments with synchrotron X-ray radiography. Direct evidence is presented for granular deformation mechanisms in both globular and equiaxed-dendritic samples at solid fractions shortly after crystal impingement. It is demonstrated that dilatancy, arching and jamming occur at the crystal scale, and that these can cause stick-slip flow due to periodic dilation and compaction at low displacement rate. Granular deformation is found to be similar in globular and equiaxed-dendritic samples if length is scaled by the crystal size and packing is considered to occur among crystal envelopes. Rheological differences between the morphologies are discussed in terms of the competition between crystal rearrangement and crystal deformation.

本文言語英語
ページ(範囲)4933-4943
ページ数11
ジャーナルActa Materialia
59
12
DOI
出版ステータス出版済み - 7 2011

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

フィンガープリント

「Granular deformation mechanisms in semi-solid alloys」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル