Observation of dislocations with a Burgers vector containing a ⟨c⟩ component in martensitic hcp ε Fe-17%Mn

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• 作者：Jin-Kyung Kim ; ^{intobe@postech.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Bruno C. De Cooman
• 关键词：Transmission electron microscopy (TEM) ; Dislocation ; ε martensite ; Deformation structure
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：128
• 期：Complete
• 页码：78-82
• 全文大小：1492 K

文摘

The occurrence of dislocations containing a ⟨c⟩ component and deformation bands in ε martensite phase, is reported. The analysis of the deformation microstructure by means of transmission electron microscopy was carried out for the hcp ε martensite phase in Fe-16.6Mn-0.03C (wt.%). The observed accommodation of c-axis deformation is considered to be essential for the homogeneous deformation of the hcp ε martensite. It is proposed that the observed dislocations containing a ⟨c⟩ component and deformation bands play an important role in the mechanism of stress-relaxation by enabling c-axis deformation.