軽金属
Online ISSN : 1880-8018
Print ISSN : 0451-5994
研究論文
AZ31マグネシウム合金の降温中多軸鍛造による微細粒組織の生成
邢 劼惣田 裕司楊 続躍三浦 博己酒井 拓
著者情報
ジャーナル フリー

54 巻 (2004) 11 号 p. 527-531

詳細
PDFをダウンロード (902K) 発行機関連絡先
抄録

Grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) with decreasing temperature from 623 K to 423 K and at a strain rate of 3×10−3 s−1. The MDF was carried out up to large cumulative strains with changing the loading direction during decreasing temperature from pass to pass. The structural changes are characterized by the generation of many mutually crossing kink bands at low strain, followed by the development of very fine grains at large strains. The dynamic change in grain size can be expressed by two different power law functions of flow stress for the region of flow stress above or below 100 MPa. The MDF with decreasing temperature can accelerate the uniform development of much finer grains and the improvement in plastic workability, leading to the minimal grain size of 0.23 μm at 423 K. The mechanism of grain refinement is discussed in detail.

著者関連情報
© 2004 一般社団法人 軽金属学会
前の記事 次の記事

閲覧履歴
feedback
Top