高压物理学报2024，Vol.38Issue(3)：37-48,12.DOI:10.11858/gywlxb.20240702
不同应变率下高强钢的拉伸行为及力学性能分析
Tensile Behavior and Mechanical Performance Analysis of High-Strength Steels at Varying Strain Rates
摘要
Abstract
High-strength steels are widely employed due to their excellent combination of high strength,good ductility,and corrosion resistance.However,they often exhibit significant strain rate sensitivity.In this study,two types of high-strength steels,Ultrafort 401 and Ferrium S53 steels,were investigated.Tensile tests were conducted at varying strain rates(10-4-103 s-1),to obtain the yield strength,the tensile strength,the uniform elongation,the hardening index and other performance parameters.The variations of these parameters with strain rate were thoroughly analyzed.It was observed that under different strain rates,Ferrium S53 steel consistently outperformed Ultrafort 401 steel in terms of tensile properties,while they exhibited different trends.As the strain rate increased,both of the yield strength and the tensile strength of Ultrafort 401 steels increased,while for Ferrium S53 steels the yield strength of increased,and the tensile strength decreased and then increased.Combined with the microstructure analysis,it is found that the higher yield strength of Ferrium S53 steel was related to the smaller grain sizes,while the different tensile strength trends of the two high-strength steels with the increase of strain rate were associated with differences in strain hardening response.With the increase of strain rate,the dimple size of Ultrafort 401 steels increases,whereas it decreases and then increases for Ferrium S53 steels.This indicates a different pattern of change in the strain hardening level of the two high-strength steels with increasing strain rate.The findings in this work provide a scientific basis for assessing the mechanical performance of high-strength steels under various loading conditions and hold significant implications for their engineering applications.关键词
高强钢/拉伸性能/应变率/断口形貌/屈服强度/抗拉强度Key words
high-strength steel/tensile properties/strain rate/fracture morphology/yield strength/tensile strength分类
数理科学引用本文复制引用
洛绒邓珠,房雷鸣,熊政伟,刘潇如,杨佳,肖礼康,郭亮,魏占涛,周章洋,易早,刘艺..不同应变率下高强钢的拉伸行为及力学性能分析[J].高压物理学报,2024,38(3):37-48,12.基金项目
国家自然科学基金(U2230119) （U2230119）
四川省自然科学基金(2022NSFSC0333) （2022NSFSC0333）
四川省杰出青年基金(22JCQN0005) （22JCQN0005）
2022年中央引导地方科技发展项目(2022ZYDF073) （2022ZYDF073）
