Fe-17Mn-8Cr合金在多向锻造过程中显微组织与性能的变化  

Microstructure and Property Changes of Fe-17Mn-8Cr Alloy during Multi-directional Forging Process

作　　者：冉敏[1,2] 严红革[1,2] 程相飞[1] 陈吉华[1,2] 苏斌[1,2] 夏伟军[1,2] 张明 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]湖南大学喷射沉积技术及应用湖南省重点实验室,长沙410082 [3]江阴兴澄特种钢铁有限公司,江阴214400

出　　处：《机械工程材料》2017年第7期18-23,共6页Materials For Mechanical Engineering

摘　　要：采用拉伸试验机和动态机械热分析仪等仪器测试了Fe-17Mn-8Cr合金在多向锻造过程中显微组织、力学性能和阻尼性能等的变化。结果表明:随着多向锻造过程的进行,ε马氏体和γ奥氏体片明显细化,分布更加均匀;合金中的位错密度急剧增大,屈服强度显著提高;多向锻造态合金的阻尼对数衰减率有所下降,但仍具有较高的阻尼性能,其阻尼机制主要是ε马氏体变体交叉程度对γ/ε界面移动以及高密度位错对层错运动的相互作用。The changes of microstructure,mechanical and damping properties of Fe-17Mn-8Cr alloy during multi-directional forging process were investigated by tensile testing and dynamic thermal mechanical analyzer.The results show that during multi-directional forging process theε-martensite andγ-austenite plates were greatly refined and more uniformly distributed.Meanwhile,a high density of dislocations was introduced and yield strength was improved obviously.The logarithmic decrement of Fe-17Mn-8Cr alloy after multi-directional forging declined but the alloy still had a high damping capacity.The damping mechanism of this alloy was interaction between the effect of variant crossing degree ofε-martensite on γ/εinterface movement and the effect of high density of dislocations on stacking fault movement.

关 键 词：Fe-17Mn-8Cr合金 多向锻造 力学性能 阻尼性能 显微组织 

分 类 号：TG135.7[一般工业技术—材料科学与工程]