2017年9月
Strengthening of A2024 alloy by high-pressure torsion and subsequent aging
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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- 巻
- 704
- 号
- 開始ページ
- 112
- 終了ページ
- 118
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.msea.2017.07.083
- 出版者・発行元
- ELSEVIER SCIENCE SA
An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of similar to 240 +/- 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.
- リンク情報
- ID情報
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- DOI : 10.1016/j.msea.2017.07.083
- ISSN : 0921-5093
- eISSN : 1873-4936
- Web of Science ID : WOS:000411847100015