超硬い鋼を粒子の境界を分断して硬くする

L Liu¹, Qin Yu², Z Wang¹

¹Department of Mechanical Engineering, University of Hong Kong, Pokfulam Road, Hong Kong, China.

Science (New York, N.Y.)

|May 9, 2020

まとめ

研究者は,デラミネーション硬化と変換誘発の可塑性を組み合わせて,超高強度鋼材を開発しました. この新しいアプローチは高強度材料の柔らかさと強さを高めます

科学分野:

材料科学
金属工学
機械工学

背景:

超高強度鋼材の開発は,高度な構造用途のために非常に重要です.
既存の高強度鋼鉄はしばしば硬度が低いため,使用が制限されています.
費用対効果は,広く採用するための重要な考慮事項です.

研究の目的:

超高強度鋼鉄の断裂耐性を高めるための新しい戦略を研究する.
高い強度 (ほぼ2GPa),柔らかさ,および断裂強さの組み合わせを達成するために.
鋼のデラミネーション硬化と変換誘発の可塑性の可能性を探求する.

主な方法:

"高強度誘導マルチデラミネーション"戦略を利用する.
マンガンで濃縮された前オースティナイトの粒の境界でデラミネーション硬化を活性化します.
カップリングデラミネーション硬化と変換誘発の可塑性
平面張力および平面張力条件下での断裂の振る舞いを分析する.

主要な成果:

約2GPaの超高収縮強度を達成し,破裂抵抗性が向上しました.
粒子の境界で制御された裂け方 (デラミネーション) が頑丈性を高めることが示された.
材料の厚さを通して複数の平面ストレスの断裂プロセスに変形します.
高強度鋼鉄の優越性への道を示しました

結論:

開発された鋼は,超高強度と卓越した頑丈さのユニークな組み合わせを示しています.
"高強度誘導マルチデラミネーション"戦略は,骨折耐性を効果的に高める.
このアプローチは,高度なエンジニアリング材料を生産するための費用対効果の高い方法を提供します.
この発見は,新しい高性能構造鋼材の開発に道を開く.

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