グラデント細胞構造の高エントロピー合金で,特殊な強さと柔らかさを持っています
Qingsong Pan1, Liangxue Zhang1,2, Rui Feng3
1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P.R. China.
まとめ
研究者らは,高エントロピー合金 (HEA) の強さと柔らかさを,グラデントナノスケールの変位細胞を導入することによって強化した. この制御された構造は,故障と双子形成を促進し,材料の特性と作業硬化を改善します.
科学分野:
- 材料科学
- 金属工学
- ナノテクノロジー
背景:
- 高エントロピー合金 (HEAs) は,強度と柔らかさの間のトレードオフを示し,その用途を制限します.
- 従来の材料は通常,強度が増えるにつれて柔らかさを失います.
- HEAの変形メカニズムを理解することは,プロパティの最適化に不可欠です.
研究 の 目的:
- 面を中心とした立方体HEAで制御的に導入されたグラデントナノスケールの変位細胞構造の効果を調査する.
- HEAで同時に強度と柔らかさを高めるために.
- 機械的性質の改善に起因する根本的な変形メカニズムを解明する.
主な方法:
- 安定した単相面中心立方高エントロピー合金.
- ナノスケールの変位細胞構造の制御された導入
- 微細構造分析と施したストレスの下での機械的試験.
主要な成果:
- 柔らかさを大幅に失わずに強度が向上した.
- 脱位細胞から核を分泌し,圧迫した際の漸進的な堆積欠陥 (SFs) と双子の形成を観察した.
- SFによる可塑性および蓄積された変位は,作業の硬化と機械的性能の改善に寄与することを実証した.
結論:
- グラデント変位細胞構造は,HEAの特性を調整するための新しいアプローチを提供します.
- 発見は,ナノスケールでのHEAsの変形行動に関する基本的な洞察を提供します.
- この戦略は,高度な高性能合金設計のための有望なパラダイムを示しています.
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