Influences of Thermomechanical Processing on The Microstructure and Mechanical Properties of a HSLA Steel

Yu Zhao

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Xu Songsong,

Xu Songsong

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Yun Zou,

Yun Zou

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Li Jinhui,

Li Jinhui

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Z.W. Zhang,

Z.W. Zhang

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Yu Zhao,

Yu Zhao

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Xu Songsong,

Xu Songsong

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Yun Zou,

Yun Zou

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Li Jinhui,

Li Jinhui

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Z.W. Zhang,

Z.W. Zhang

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, P R China

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Book Editor(s):Antoine Allanore,

Antoine Allanore

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Laura Bartlett,

Laura Bartlett

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Cong Wang,

Cong Wang

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Lifeng Zhang,

Lifeng Zhang

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Jonghyun Lee,

Jonghyun Lee

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First published: 15 January 2016

https://doi.org/10.1002/9781119274742.ch7

Summary

High strength low alloy (HSLA) steels with high strength, high toughness, good corrosion resistance and weldability, can be widely used in shipbuilding, automobile, construction, bridging industry, etc. The microstructure evolution and mechanical properties can be influenced by thermomechanical processing. In this study, themomechanical processing is optimized to control the matrix microstructure and nano-scale precipitates in the matrix simultaneously. It is found that the low-temperature toughness and ductility of the steels are significantly the matrix microstructure during enhancing the strength by introducing the nano-scale precipitates. The effects of alloying elements on the microstructure evolution and nano-scale precipitation are also discussed.

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