Twin structure of the lath martensite in low carbon steel
It has been well accepted that the martensites in quenched carbon steels exhibit two typical morphologies which are closely dependent on the carbon content, i.e. lath martensite in low carbon steels and lenticular martensite in high carbon steels. Based on conventional belief, the lath martensites i...
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doaj-a9997ead80c74fbfa32d6eaa88fb8e782020-11-24T22:57:44ZengElsevierProgress in Natural Science: Materials International1002-00712016-04-0126216917210.1016/j.pnsc.2016.03.004Twin structure of the lath martensite in low carbon steelPan Zhang0Yulin Chen1Wenlong Xiao2Dehai Ping3Xinqing Zhao4School of Materials Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing 100191, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, 116028 Dalian, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing 100191, ChinaIt has been well accepted that the martensites in quenched carbon steels exhibit two typical morphologies which are closely dependent on the carbon content, i.e. lath martensite in low carbon steels and lenticular martensite in high carbon steels. Based on conventional belief, the lath martensites in low carbon steels are with high density dislocations as the substructure, in contrast to twin substructure in lenticular high carbon martensite. In the present work, an intensive transmission electron microscopy investigation was made to characterize the microstructures of the lath martensite in a low carbon steel of 0.2 wt%C. It was found that lots of lath martensites consist of twin as their substructure, rather than high density dislocations. In addition, nanoscale precipitates cohering with ferrite matrix were found at the twin interfaces. The orientation relationships between the precipitates and the ferrite matrix are in good agreement with that of primitive hexagonal ω phase in titanium alloys and other bcc metals or alloys.http://www.sciencedirect.com/science/article/pii/S1002007116300041MartensiteTwinLathLow carbon steelMartensitic transformation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Pan Zhang Yulin Chen Wenlong Xiao Dehai Ping Xinqing Zhao |
spellingShingle |
Pan Zhang Yulin Chen Wenlong Xiao Dehai Ping Xinqing Zhao Twin structure of the lath martensite in low carbon steel Progress in Natural Science: Materials International Martensite Twin Lath Low carbon steel Martensitic transformation |
author_facet |
Pan Zhang Yulin Chen Wenlong Xiao Dehai Ping Xinqing Zhao |
author_sort |
Pan Zhang |
title |
Twin structure of the lath martensite in low carbon steel |
title_short |
Twin structure of the lath martensite in low carbon steel |
title_full |
Twin structure of the lath martensite in low carbon steel |
title_fullStr |
Twin structure of the lath martensite in low carbon steel |
title_full_unstemmed |
Twin structure of the lath martensite in low carbon steel |
title_sort |
twin structure of the lath martensite in low carbon steel |
publisher |
Elsevier |
series |
Progress in Natural Science: Materials International |
issn |
1002-0071 |
publishDate |
2016-04-01 |
description |
It has been well accepted that the martensites in quenched carbon steels exhibit two typical morphologies which are closely dependent on the carbon content, i.e. lath martensite in low carbon steels and lenticular martensite in high carbon steels. Based on conventional belief, the lath martensites in low carbon steels are with high density dislocations as the substructure, in contrast to twin substructure in lenticular high carbon martensite. In the present work, an intensive transmission electron microscopy investigation was made to characterize the microstructures of the lath martensite in a low carbon steel of 0.2 wt%C. It was found that lots of lath martensites consist of twin as their substructure, rather than high density dislocations. In addition, nanoscale precipitates cohering with ferrite matrix were found at the twin interfaces. The orientation relationships between the precipitates and the ferrite matrix are in good agreement with that of primitive hexagonal ω phase in titanium alloys and other bcc metals or alloys. |
topic |
Martensite Twin Lath Low carbon steel Martensitic transformation |
url |
http://www.sciencedirect.com/science/article/pii/S1002007116300041 |
work_keys_str_mv |
AT panzhang twinstructureofthelathmartensiteinlowcarbonsteel AT yulinchen twinstructureofthelathmartensiteinlowcarbonsteel AT wenlongxiao twinstructureofthelathmartensiteinlowcarbonsteel AT dehaiping twinstructureofthelathmartensiteinlowcarbonsteel AT xinqingzhao twinstructureofthelathmartensiteinlowcarbonsteel |
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