Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel
The flow stress behavior of high-strength low-alloy (HSLA) steel at different true strains was studied using a hot compression test. The effect of dynamic recrystallization (DRX) on the transformed ferrite microstructures was investigated with electron backscatter diffraction (EBSD). The EBSD analys...
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doaj-dab97a548f2441ccb3c243b261f405512020-11-25T02:25:06ZengMDPI AGMetals2075-47012020-06-011081781710.3390/met10060817Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA SteelNing Li0Wilasinee Kingkam1Renheng Han2Ming Tang3Hexin Zhang4Chengzhi Zhao5Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaResearch and Development Division, Thailand Institute of Nuclear Technology, Nakorn Nayok 26120, ThailandKey Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaKey Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaThe flow stress behavior of high-strength low-alloy (HSLA) steel at different true strains was studied using a hot compression test. The effect of dynamic recrystallization (DRX) on the transformed ferrite microstructures was investigated with electron backscatter diffraction (EBSD). The EBSD analysis indicated that the fraction of high-angle grain boundaries (HAGBs) and DRX increased with increasing true strain. The low-angle grain boundaries (LAGBs) were gradually transformed into HAGBs with increasing DRX degree. When the true strain was increased to 0.916, the fraction of HAGBs increased to 85% and the fraction of DRX increased to 80.3%. The relatively high fraction of HAGBs was related to the complete DRX. The dislocations and substructures in the tested steel at different true strains were characterized by transmission electron microscopy (TEM). TEM observation shows that the nucleation of the dynamically recrystallized grains occurred by the bulging of the original grain boundaries. The DRX nucleation mechanism of the HSLA steel is the strain-induced grain boundary migration mechanism.https://www.mdpi.com/2075-4701/10/6/817HSLA steelEBSDdynamic recrystallization |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ning Li Wilasinee Kingkam Renheng Han Ming Tang Hexin Zhang Chengzhi Zhao |
spellingShingle |
Ning Li Wilasinee Kingkam Renheng Han Ming Tang Hexin Zhang Chengzhi Zhao Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel Metals HSLA steel EBSD dynamic recrystallization |
author_facet |
Ning Li Wilasinee Kingkam Renheng Han Ming Tang Hexin Zhang Chengzhi Zhao |
author_sort |
Ning Li |
title |
Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel |
title_short |
Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel |
title_full |
Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel |
title_fullStr |
Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel |
title_full_unstemmed |
Effect of Dynamic Recrystallization on the Transformed Ferrite Microstructures in HSLA Steel |
title_sort |
effect of dynamic recrystallization on the transformed ferrite microstructures in hsla steel |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2020-06-01 |
description |
The flow stress behavior of high-strength low-alloy (HSLA) steel at different true strains was studied using a hot compression test. The effect of dynamic recrystallization (DRX) on the transformed ferrite microstructures was investigated with electron backscatter diffraction (EBSD). The EBSD analysis indicated that the fraction of high-angle grain boundaries (HAGBs) and DRX increased with increasing true strain. The low-angle grain boundaries (LAGBs) were gradually transformed into HAGBs with increasing DRX degree. When the true strain was increased to 0.916, the fraction of HAGBs increased to 85% and the fraction of DRX increased to 80.3%. The relatively high fraction of HAGBs was related to the complete DRX. The dislocations and substructures in the tested steel at different true strains were characterized by transmission electron microscopy (TEM). TEM observation shows that the nucleation of the dynamically recrystallized grains occurred by the bulging of the original grain boundaries. The DRX nucleation mechanism of the HSLA steel is the strain-induced grain boundary migration mechanism. |
topic |
HSLA steel EBSD dynamic recrystallization |
url |
https://www.mdpi.com/2075-4701/10/6/817 |
work_keys_str_mv |
AT ningli effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel AT wilasineekingkam effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel AT renhenghan effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel AT mingtang effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel AT hexinzhang effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel AT chengzhizhao effectofdynamicrecrystallizationonthetransformedferritemicrostructuresinhslasteel |
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1724852798940512256 |