Microstructure of ultrahigh carbon martensite
Recent experimental investigations suggest that the martensite formed by quenching carbon steels (0.2–1.26 mass %C) are composed of twins and nanoscale ω particles in twin boundaries, rather than carbon supersaturated uniform solutions. In order to probe the microstructure of the martensite with ult...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2018-12-01
|
Series: | Progress in Natural Science: Materials International |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1002007118308700 |
id |
doaj-47f8b4b0ef924c1093d8b74ebea60b6a |
---|---|
record_format |
Article |
spelling |
doaj-47f8b4b0ef924c1093d8b74ebea60b6a2020-11-25T00:42:06ZengElsevierProgress in Natural Science: Materials International1002-00712018-12-01286749753Microstructure of ultrahigh carbon martensiteChao Wang0Yulin Chen1Jingyun Han2Dehai 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, China; Corresponding authors.School of Materials Science and Engineering, Dalian Jiaotong University, 116028 Dalian, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing 100191, China; Corresponding authors.Recent experimental investigations suggest that the martensite formed by quenching carbon steels (0.2–1.26 mass %C) are composed of twins and nanoscale ω particles in twin boundaries, rather than carbon supersaturated uniform solutions. In order to probe the microstructure of the martensite with ultrahigh carbon content, a novel strategy is employed in the present study to obtain ultrahigh carbon martensite (approximate 2.1 mass %C) by quenching ductile cast iron. The microstructure of the martensite was intensively characterized by high resolution transmitting electron microscopy. It is indicated that the microstructure of the ultrahigh carbon martensites is composed of ultrafine {112} <111>-type twins and high-density nano-scaled ω particles embedded in twin boundaries. These ω nanoparticles in twin boundaries could remarkably impede the deformation of the movement of the nanotwins in martensites, leading to poor ductility and strength of the quenched ductile cast iron. These findings not only reveal the substructures of ultrahigh carbon martensite, but also enhance the understanding of the mechanical behavior of high carbon steels and ductile cast irons. Keywords: Ultrahigh carbon martensite, Ductile cast iron, Nanotwin, ω phasehttp://www.sciencedirect.com/science/article/pii/S1002007118308700 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chao Wang Yulin Chen Jingyun Han Dehai Ping Xinqing Zhao |
spellingShingle |
Chao Wang Yulin Chen Jingyun Han Dehai Ping Xinqing Zhao Microstructure of ultrahigh carbon martensite Progress in Natural Science: Materials International |
author_facet |
Chao Wang Yulin Chen Jingyun Han Dehai Ping Xinqing Zhao |
author_sort |
Chao Wang |
title |
Microstructure of ultrahigh carbon martensite |
title_short |
Microstructure of ultrahigh carbon martensite |
title_full |
Microstructure of ultrahigh carbon martensite |
title_fullStr |
Microstructure of ultrahigh carbon martensite |
title_full_unstemmed |
Microstructure of ultrahigh carbon martensite |
title_sort |
microstructure of ultrahigh carbon martensite |
publisher |
Elsevier |
series |
Progress in Natural Science: Materials International |
issn |
1002-0071 |
publishDate |
2018-12-01 |
description |
Recent experimental investigations suggest that the martensite formed by quenching carbon steels (0.2–1.26 mass %C) are composed of twins and nanoscale ω particles in twin boundaries, rather than carbon supersaturated uniform solutions. In order to probe the microstructure of the martensite with ultrahigh carbon content, a novel strategy is employed in the present study to obtain ultrahigh carbon martensite (approximate 2.1 mass %C) by quenching ductile cast iron. The microstructure of the martensite was intensively characterized by high resolution transmitting electron microscopy. It is indicated that the microstructure of the ultrahigh carbon martensites is composed of ultrafine {112} <111>-type twins and high-density nano-scaled ω particles embedded in twin boundaries. These ω nanoparticles in twin boundaries could remarkably impede the deformation of the movement of the nanotwins in martensites, leading to poor ductility and strength of the quenched ductile cast iron. These findings not only reveal the substructures of ultrahigh carbon martensite, but also enhance the understanding of the mechanical behavior of high carbon steels and ductile cast irons. Keywords: Ultrahigh carbon martensite, Ductile cast iron, Nanotwin, ω phase |
url |
http://www.sciencedirect.com/science/article/pii/S1002007118308700 |
work_keys_str_mv |
AT chaowang microstructureofultrahighcarbonmartensite AT yulinchen microstructureofultrahighcarbonmartensite AT jingyunhan microstructureofultrahighcarbonmartensite AT dehaiping microstructureofultrahighcarbonmartensite AT xinqingzhao microstructureofultrahighcarbonmartensite |
_version_ |
1725283914684039168 |