抄録
Aluminum alloys in the 7xxx series are high-strength alloys that are used in a wide variety of products in the transportation equipment and aerospace fields to reduce weight. In particular, the A7075 alloy has the highest strength and is expected to find further applications in a wide range of fields such as aircraft parts and sporting goods. However, low productivity is a problem due to its high deformation resistance, tendency to produce surface defects called tearing on the product surface, and short tool life. Tearing tends to occur under high temperature and high speed conditions, and is thought to be caused by local melting of Zn, an additive element, due to heat generation in processing. In this study, to improve the productivity of A7075 alloy, the profile was cooled during extrusion to prevent recrystallization of extrudate surface grains due to processing heat and to prevent processing heat during forming. In order to investigate the cooling effect, hot extrusion simulation was conducted. The cooling effect successfully suppressed the occurrence of tearing. These results indicate that cooling the extrudate during forming reduces the effect of heat generation during forming and prevents recrystallization of the extrudate surface grains and local melting of Zn.
本文言語 | 英語 |
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ホスト出版物のタイトル | Key Engineering Materials |
出版社 | Scientific.net |
ページ | 409-415 |
ページ数 | 7 |
巻 | 926 |
ISBN(電子版) | 1662-9795 |
DOI | |
出版ステータス | 出版済み - 2022 |
イベント | 25th International Conference on Material Forming, ESAFORM 2022 - Braga, ポルトガル 継続期間: 2022/04/27 → 2022/04/29 |
学会
学会 | 25th International Conference on Material Forming, ESAFORM 2022 |
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国/地域 | ポルトガル |
City | Braga |
Period | 2022/04/27 → 2022/04/29 |
ASJC Scopus 主題領域
- 材料科学一般
- 材料力学
- 機械工学