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50Mn18Cr4奧氏體鋼形變強化的電鏡、x線研究

  • 摘要: 本文用薄晶體透射電鏡和單色化x線衍射方法研究了50Mn18Cr4奧氏體鋼的形變強化機理。實驗結果表明,這種鋼的層錯能很低,輕微變形之后就產生大量層錯。隨著變形量的增加,對于奧氏體穩定性較高的鋼,層錯傾向于發展成形變孿晶;對于奧氏體穩定性較低的鋼,層錯傾向于發展成ε馬氏體。此外,通過電子衍襯象還觀察了層錯、形變享晶、ε馬氏體和晶界對位錯運動的阻礙作用。在此基礎上,對高錳奧氏體鋼形變強化機制及其與鋼中化學成分的關系作了分析與討論。

     

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