Fe-C-Si-Mn-Mo合金贝氏体—奥氏体界面位错的观察

Observations of the Bainite/Austenite Interface Structure in An Fe-C-Si-Mn-Mo Alloy

摘要: 本文用STEM电镜观察了Fe-0.48C-0.80Mn-1.30Si-0.45Mo合金的贝氏体-奥氏体界面位错的形貌及晶体学特征。结果表明,贝氏体-奥氏体界面的位错组态很接近于Rigsbee和Aaronson所描述的魏氏铁素体的界面结构。本文还讨论了贝氏体、板条马氏体、魏氏铁素体的界面结构及界面迁移机制的异同。
- 贝氏铁素体 /
- 魏氏铁素体 /
- 板条马氏体 /
- 界面位错 /
- 长大台阶
Abstract: The morphologies and crystallographic features of bainite/austenite interface structure formed isothermally in an Fe-C-Si-Mn-Mo alloy have been studied by means of STEM(a Vacuum Generators HB5).These observations are interpreted in terms of current ideas concerning the structure migration characteristics of FCC/BCC interfaces.It is concluded that the bainite/austenite interface is probably closely similar to Widmanstatten ferrite described by Rigsbee and Aaronson. The differentia between bainite and lath martensite,Widmanstatten ferrite interface structure and migration mechanism, are discussed.
- bainitic ferrite /
- Widmanstatten ferrite /
- lath martensite /
- interfacial dislocations /
- growth ledge