Martensitic phase transformation and pop-in in compression of austenitic steel nanoplates observed in situ by transmission electron microscopy

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• 作者：Yong-Jae Kim^a ; Byung-Gil Yoo^a ; In-Chul Choi^a ; Moo-Young Seok^a ; Ju-Young Kim^b ; Takahito Ohmura^c ; Jae-il Jang^a ; ^{jijang@hanyang.ac.kr}
• 关键词：Martensitic transformation ; Steel ; In situ TEM ; Pop-in
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 May, 2012
• 卷：75
• 期：Complete
• 页码：107-110
• 文件大小：615 K

摘要

To explore small-scale martensitic phase transformation and its relation to pop-ins observed in stress-strain curve, in situ compression experiments in transmission electron microscope were performed on austenitic steel nanoplates. Diffraction mode test revealed that the transformation indeed occurs at the nanoscale, but the pop-in seems not related with sudden microstructural change. Additional imaging mode test suggests that pop-ins may be caused by rapid formation of slip band and/or shearing-off of the nanoplate.