王威,陈淑梅,严伟,赵立君,单以银,杨柯

• 1:中国科学院金属研究所
• 2:中国铁道科学研究院机车车辆研究所

摘要(Abstract)：

利用透射电镜(TEM)对氮含量为0.66%和1.2%的高氮奥氏体不锈钢的冷变形微观结构进行了对比研究。结果表明,氮含量的增加提高了材料的层错能,强烈促进位错的平面滑移。冷变形过程中不断形成机械孪晶,机械孪晶随变形量的增加而减小,在60%变形量时只有几百纳米长。运用扩展位错和短程有序理论对氮的作用机理的分析表明,氮合金化引起的短程有序是促进位错平面滑移、提高材料加工硬化能力的主要因素,低层错能引起的位错扩展也有重要作用。

关键词(KeyWords)： 高氮钢;冷变形;微观组织;层错能;短程有序

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(50534010)

作者(Author): 王威,陈淑梅,严伟,赵立君,单以银,杨柯

DOI: 10.13289/j.issn.1009-6264.2010.07.029

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