锻压技术

应变速率对H260YD+Z钢力学性能及断口形貌的影响

英文标题：Influence of strain rate on mechanical properties and fracture morphology for H260YD+Z steel

作者：王彦婷1 张龙列2 黑中垒1

单位：1.黄河交通学院汽车工程学院河南焦作454950 2.多氟多新材料股份有限公司河南焦作454950

分类号：TG142.1+2；U463.83

出版年,卷(期):页码：2025,50(6):249-258

摘要：

以无间隙原子钢H260YD+Z为研究对象，分析了应变速率对其力学性能和断口形貌的影响。首先，获取了7种应变速率下H260YD+Z钢的高速拉伸力学性能曲线，并分析了关键参数的变化规律；然后，基于Johnson-Cook模型建立了材料的动态力学性能本构模型，并采用穿孔试验与仿真对比分析，验证了所搭建的本构模型的准确性；最后，分析了不同应变速率下拉伸试样的断口形貌，获取了韧窝和裂纹的分布规律。结果表明：HC260YD+Z钢呈现明显的应变速率敏感性，强度与应变速率呈正相关，塑性特征的变化趋势则相对复杂；不同应变速率下的拉伸断口均呈韧窝状，为韧性断裂特征，且韧窝的尺寸和密度随着应变速率的提升而增大；断裂裂纹最先萌生于铁素体的晶界，且越靠近断口，裂纹的密度越大；Johnson-Cook本构模型的拟合曲线的决定系数大于0.97，且穿孔试验与仿真分析获取的关键参数偏差低于5%，表明所搭建的材料本构模型的表征精度较高。

For H260YD+Z interstitial free steel, the influences of strain rate on mechanical properties and fracture morphology were analyzed. Firstly, the high-speed tensile mechanical property curves of H260YD+Z steel at seven strain rates were obtained, and the variation rules of key parameters were analyzed. Then, based on the Johnson-Cook model, the dynamic mechanical property constitutive model of the material was established, and the accuracy of the constructed constitutive model was verified by the comparison analysis between the perforation test and the simulation. Finally, the fracture morphology of tensile specimens under different strain rates was analyzed, and the distribution laws of dimples and cracks were obtained. The results show that HC260YD+Z steel exhibits obvious strain rate sensitivity, the strength is positively correlated with the strain rate, and the change trend of plastic characteristics is relatively complex. The tensile fractures under different strain rates are all dimple-shaped, which are ductile fracture characteristics, and the size and density of the dimples increase with the increasing of strain rate. The fracture crack first initiates at the grain boundary of ferrite, and the closer to the fracture, the greater the crack density. The determination coefficient of the fitting curve for the Johnson-Cook constitutive model exceeds 0.97, and the deviation of the key parameters obtained by the perforation test and the simulation analysis is less than 5%, indicating that the constructed material constitutive model has high characterization accuracy.

基金项目：

河南省教育科学规划2024年度一般课题（2024YB0398）

作者简介：王彦婷（1988-），女，硕士，讲师，E-mail：757219202@qq.com

参考文献：

[1]冯毅,张德良,高翔,等. 面向新能源时代的汽车用钢EVI工程技术发展[J]. 汽车工艺与材料,2023(9):8-15.

Feng Y，Zhang D L，Gao X，et al. Development of EVI engineering technologies for automotive steel in the new energy era [J]. Automobile Technology & Material, 2023(9): 8-15.

[2]张铁国,刘旭辉,黑中垒,等. 汽车碰撞安全的影响因素分析[J]. 时代汽车,2023(12):193-195.

Zhang T G，Liu X H，Hei Z L，et al. Analysis of influencing factors of automobile collision safety [J]. Auto Time, 2023(12): 193-195.

[3]王彦婷,刘海娜,王凯.基于HyperMesh应变速率对零件材料性能影响分析[J].机械设计与制造,2024(6):242-245.

Wang Y T，Liu H N，Wang K. Effect of strain rate on material properties of carbody parts based on HyperMesh [J]. Machinery Design & Manufacture,2024(6):242-245.

[4]董振通,孟宪明,管建军,等.双相钢HC420/780DP动态力学性能及其本构模型研究[J].辽宁石油化工大学学报,2023,43(1):61-66.

Dong Z T，Meng X M，Guan J J，et al. Dynamic mechanical properties and constitutive model of double phase steel HC420/780DP [J]. Journal of Liaoning Petrochemical University,2023,43(1):61-66.

[5]刘培星.CR1500HF热成形钢U形件不同位置的高速拉伸性能及其有限元模拟[J].机械工程材料, 2021, 45(5): 96-99，104.

Liu P X. High-speed tensile properties and their finite element simulation at different positions of CR1500HF hot-forming steel U-shaped parts [J]. Materials for Mechanical Engineering, 2021, 45(5):96-99，104.

[6]张伟,潘跃,刘华赛,等. 应变速率对增强成形性双相钢性能影响分析[J]. 钢铁,2022,57(4):123-129.

Zhang W，Pan Y，Liu H S，et al. Effect of strain rate on properties of dual phase steel with high formability [J]. Iron and Steel,2022,57(4):123-129.

[7]董刘颖,李秋梅,马龙飞,等.应变速率对6082铝合金拉伸性能及断口形貌的影响[J].热处理技术与装备,2020,41(2):14-17.

Dong L Y，Li Q M，Ma L F，et al. Effect of strain rate on tensile properties and fracture morphology of 6082 aluminum alloy [J]. Heat Treatment Technology and Equipment, 2020, 41(2): 14-17.

[8]于沛,夏卿.相变诱导塑性钢高应变速率性能和失效行为分析[J].锻压技术,2023,48(4):256-264.

Yu P, Xia Q. Analysis on high strain rate properties and failure behavior of transformation induced plasticity steel [J]. Forging & Stamping Technology,2023,48(4):256-264.

[9]韩赟,邱木生,邹英,等. 高塑性应变比Ti-IF钢组织性能及析出相[J]. 钢铁,2021,56(3):77-83.

Han Y, Qiu M S, Zou Y, et al. Precipitates,microstructure and properties of Ti-IF steel with high plastic strain ratio [J]. Iron and Steel,2021,56(3):77-83.

[10]GB/T 228.1—2021，金属材料拉伸试验第1部分:室温试验方法[S].

GB/T 228.1—2021，Metallic materials—Tensile testing—Part 1: Method of test at room temperature test [S].

[11]GB/T 30069.2—2016，金属材料高应变速率拉伸试验第2部分：液压伺服型与其他类型试验系统[S].

GB/T 30069.2—2016，Metallic material—Tensile testing at high strain rates—Part 2：Servo-hydraulic and other test systems[S].

[12]刘海娜,梅运东,刘领兵. 应变速率对低合金高强钢性能的影响[J].锻压技术, 2023, 48(6):253-257.

Liu H N，Mei Y D，Liu L B. Influence of strain rate on properties for low alloy high strength steel [J]. Forging & Stamping Technology, 2023, 48(6):253-257.

[13]张伟,李春光,韩赟,等. 高强双相钢动态力学本构模型对比分析[J]. 塑性工程学报,2021,28(6):75-82.

Zhang W，Li C G，Han Y，et al. Comparative analysis of dynamic mechanical constitutive model of high strength dual phase steel [J]. Journal of Plasticity Engineering, 2021, 28(6): 75-82.

[14]苑文婧,刘晓航,田浩彬,等. 应变速率对HC340LA低合金高强度钢板拉伸性能的影响[J]. 机械工程材料,2015,39(8):91-93.

Yuan W J，Liu X H，Tian H B，et al. Effects of strain rate on tensile properties of high strength low alloy steel plate HC340LA [J]. Materials for Mechanical Engineering, 2015, 39(8):91-93.

[15]张鹏,徐飞越,李兵,等.温成形对QP980钢板力学行为及微观组织演变的影响[J].锻压技术,2024,49(5):53-60.

Zhang P, Xu F Y, Li B, et al. Effect of warm forming on mechanical behavior and microstructure evolution of QP980 steel plate [J]. Forging & Stamping Technology, 2024, 49(5):53-60.

[16]董丹阳,刘杨,王磊,等.应变速率对DP780钢动态拉伸变形行为的影响[J].金属学报,2013,49(2):159-166.

Dong D Y, Liu Y, Wang L, et al. Effect of strain rate on dynamic deformation behavior of DP780 steel[J]. Acta Metallurgica Sinica,2013,49(2):159-166.

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