Paper Title:

Effect of the Strain Rate on Mechanical Properties and Microstructure of High Strength Low Alloy Steel HC340LA

Periodical Applied Mechanics and Materials (Volumes 217 - 219)
Main Theme Advanced Materials and Process Technology
Chapter Chapter 4: Steel
Edited by Xianghua Liu, Zhenhua Bai, Yuanhua Shuang, Cunlong Zhou and Jian Shao
Pages 467-470
DOI 10.4028/www.scientific.net/AMM.217-219.467
Citation Xiao Hang Liu et al., 2012, Applied Mechanics and Materials, 217-219, 467
Online since November 2012
Authors Xiao Hang Liu, Wen Jing Yuan, Hao Bin Tian, Fa Xi Diao
Keywords High-Speed Tension, HSLA Steel, Microstructure, Quasi-Static Tension, Strain Rate
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The mechanical properties and microstructure of the high strength low alloy HC340LA were obtained with different strain rate. The research shows that the better plasticity, higher tensile strength and yield ratio can be found in high speed tensile state than in quasi-static tension. The plasticity and tensile strength decrease with the increasing of the strain rate during the high speed tension. With the increasing of the strain rate, the grain size of the ferrite decreases and its distribution is uneven, and the grain boundaries increases. The HSLA steel HC340LA submit to obvious Ductile Frecture mechanism. The size of the dimples is more uniform, bigger and deeper with the strain rate 50 s-1 than with the strain rate 200 s-1. Therefore, the higher strain rate with over strain rate 50 s-1 has less Superscript textcontribution to the improvement of plasticity of the HSLA steel HC340LA.

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