冀国良,李付国,李庆华,李惠曲,李志

• 1:西北工业大学材料科学与工程学院
• 2:河南理工大学材料学院
• 3:北京航空材料研究院

摘要(Abstract)：

在变形温度800～1200℃和应变速率0.01～50s-1下,利用Gleeble-3800热模拟试验机对Aermet100钢的高温变形本构关系与微观组织演变进行了研究。结果表明,增加应变速率和降低变形温度都能提高材料的流动应力,延迟动态再结晶发生,使变形材料表现出加工硬化和动态回复。运用位错理论研究了微观组织和流动应力曲线的变化规律并做出了合理的解释。在压缩实验的变形条件下变形激活能为489.10kJ/mol。确定了峰值应力、变形温度和应变速率之间的双曲正弦模型的本构关系。

关键词(KeyWords)： Aermet100钢;本构关系;微观组织;变形激活能

Abstract:

Keywords:

基金项目(Foundation): 航空基础科学基金项目(03H53048)

作者(Author): 冀国良,李付国,李庆华,李惠曲,李志

DOI: 10.13289/j.issn.1009-6264.2010.03.030

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