Quantitative characterization of microstructure in high strength microalloyed steels
X-ray diffraction (XRD) profile fitting (Rietveld method) was used in this study to characterize the microstructure for seven microalloyed steels, which were produced through thermomechanical controlled processing (TMCP). Microstructure characterization was conducted through the strip thickness. The...
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ndltd-LACETR-oai-collectionscanada.gc.ca-AEU.10048-5322012-07-03T12:11:11ZHenein, Hani (Department of Chemical and Materials Engineering)Ivey, Douglas (Department of Chemical and Materials Engineering)Li, Xiujun2009-08-21T17:22:52Z2009-08-21T17:22:52Z2009-08-21T17:22:52Zhttp://hdl.handle.net/10048/532X-ray diffraction (XRD) profile fitting (Rietveld method) was used in this study to characterize the microstructure for seven microalloyed steels, which were produced through thermomechanical controlled processing (TMCP). Microstructure characterization was conducted through the strip thickness. The microstructural variables studied include subgrain size, dislocation density, texture index and weight percent of retained austenite. The subgrain size was also analyzed by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The effects of processing parameters, including coiling temperature, cooling rate and alloying elements, on the microstructure were also investigated. It was found that decreasing the coiling temperature resulted in a finer subgrain size and higher dislocation densities. The texture index was observed to increase with decreasing coiling temperature. The subgrain size decreased and dislocation density increased as the amount of alloying elements (Ni, Mo and Mn) were increased. The amount of retained austenite increased at the strip center with increasing coiling temperature and increasing C and Ni content.7605644 bytesapplication/pdfenRietveld methodMicrostructureMicroalloyed steelCooling rateCoiling temperatureTMCPEBSDSubgrain sizeDislocation densityTextureRetained austeniteQuantitative characterization of microstructure in high strength microalloyed steelsThesisMaster of Science in Materials EngineeringMaster'sDepartment of Chemical and Materials EngineeringUniversity of Alberta2009-11Materials EngineeringXia, Zihui (Mechanical Engineering)Chen, Weixing (Department of Chemical and Materials Engineering)Henein, Hani (Department of Chemical and Materials Engineering)Ivey, Douglas (Department of Chemical and Materials Engineering) |
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Rietveld method Microstructure Microalloyed steel Cooling rate Coiling temperature TMCP EBSD Subgrain size Dislocation density Texture Retained austenite |
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Rietveld method Microstructure Microalloyed steel Cooling rate Coiling temperature TMCP EBSD Subgrain size Dislocation density Texture Retained austenite Li, Xiujun Quantitative characterization of microstructure in high strength microalloyed steels |
description |
X-ray diffraction (XRD) profile fitting (Rietveld method) was used in this study to characterize the microstructure for seven microalloyed steels, which were produced through thermomechanical controlled processing (TMCP). Microstructure characterization was conducted through the strip thickness. The microstructural variables studied include subgrain size, dislocation density, texture index and weight percent of retained austenite. The subgrain size was also analyzed by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The effects of processing parameters, including coiling temperature, cooling rate and alloying elements, on the microstructure were also investigated. It was found that decreasing the coiling temperature resulted in a finer subgrain size and higher dislocation densities. The texture index was observed to increase with decreasing coiling temperature. The subgrain size decreased and dislocation density increased as the amount of alloying elements (Ni, Mo and Mn) were increased. The amount of retained austenite increased at the strip center with increasing coiling temperature and increasing C and Ni content. === Materials Engineering |
author2 |
Henein, Hani (Department of Chemical and Materials Engineering) |
author_facet |
Henein, Hani (Department of Chemical and Materials Engineering) Li, Xiujun |
author |
Li, Xiujun |
author_sort |
Li, Xiujun |
title |
Quantitative characterization of microstructure in high strength microalloyed steels |
title_short |
Quantitative characterization of microstructure in high strength microalloyed steels |
title_full |
Quantitative characterization of microstructure in high strength microalloyed steels |
title_fullStr |
Quantitative characterization of microstructure in high strength microalloyed steels |
title_full_unstemmed |
Quantitative characterization of microstructure in high strength microalloyed steels |
title_sort |
quantitative characterization of microstructure in high strength microalloyed steels |
publishDate |
2009 |
url |
http://hdl.handle.net/10048/532 |
work_keys_str_mv |
AT lixiujun quantitativecharacterizationofmicrostructureinhighstrengthmicroalloyedsteels |
_version_ |
1716392028183461888 |