ピラミッドの変位によって媒介されるマグネシウムの大きな可塑性
まとめ
マグネシウム合金はエネルギー効率を高めるために強化することができます. サブミクロメーターマグネシウムの試料は,ピラミッドの平面により多くの変位を活性化することによって,柔らかさと強さを改善します.
科学分野:
- 材料科学
- 金属工学
- 機械工学
背景:
- 軽量なマグネシウム合金は 輸送のエネルギー効率に不可欠です
- マグネシウムの限られた伸縮性は,しばしば非基礎変位に起因し,広範な適用を妨げています.
- マグネシウムの可塑性を高めることが 潜在力を発揮する鍵です
研究 の 目的:
- マグネシウムのプラスチックのストレスを収納する非基礎 (NP) 変位の役割を調査する.
- 微小量のマグネシウムの プラスチック性を調べるため
- 結晶の大きさ,変位活動,および機械的性質の関係を理解する.
主な方法:
- インサイト伝送電子顕微鏡 (TEM) の機械試験
- ピラミッド型の平面での脱位滑行の観察と分析
- サブミクロメーターとバルクマグネシウムサンプル間の機械的性質の比較
主要な成果:
- 非基礎的変位は,ピラミッドの平面に滑り込むことで,重要なプラスチックストレスを収納することができます.
- サブミクロメーターのマグネシウムの試料は,散発品と比較してかなり高い可塑性を示しています.
- より小さな結晶の大きさは,より高いストレスにつながり,より高い可塑性と強度のために,より多くの非基礎的変位を活性化します.
結論:
- この研究は,マグネシウム合金の柔らかさを高めるメカニズムを示しています.
- サブミクロンマグネシウムは高強度と高柔らかさのアプリケーションに希望を示しています.
- マグネシウムのメカニカル性能を向上させるには 結晶のサイズを制御することが有効です
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