锰元素对TWIP钢层错能和变形机制的影响  

The Influence of Manganese on the Stacking Fault Energy and Deformation Mechanisms of the TWIP Steel

作　　者：代永娟[1] 唐荻[1] 米振莉[1] 江海涛[1] 吕建崇[1] 

机构地区：[1]北京科技大学高效轧制国家工程中心,北京100083

出　　处：《材料工程》2009年第7期39-42,共4页Journal of Materials Engineering

基　　金：国家自然科学基金(50575022);国家高技术研究发展计划(863计划)(2008AA03E502)

摘　　要：根据层错能的热力学模型,计算了Fe-XMn-3Si-3Al系高强度高塑性TWIP钢的层错能。计算结果表明,随锰含量增加Fe-XMn-3Si-3Al系TWIP钢层错能增加,在此基础上讨论了锰含量对Fe-XMn-3Si-3Al系TWIP钢变形机制、力学性能和微观组织的影响。在合金中Mn含量的提高使层错能增加,而层错能的增加使Fe-XMn-3Si-3Al系钢表现出不同的变形机制,即逐渐由TRIP效应变为TWIP效应;同时随着Mn含量的提高,合金的抗拉强度降低,而塑性提高。The stacking fault energy of the Fe-XMn-3Si-3Al system alloys was calculated according to the thermodynamic model of stacking fault energy. The calculated results showed that the stacking fault energy of Fe-XMn-3Si-3Al system alloys increased with increasing manganese content. The influence of Manganese content on the deformation mechanisms, mechanical properties and microstructure of Fe XMn-3Si 3Al system alloys was discussed based on above results. With the increasing of manganese content, the Fe XMn-3Si-3Al system alloys show different deformation mechanisms from the TRIP effect turns to the TWIP effect. At the same time, the strength decreasing and the elongation increasing.

关 键 词：层错能 TWIP钢 锰含量 变形机制 

分 类 号：TG139.6[一般工业技术—材料科学与工程]