不同应变率下高强钢的拉伸行为及力学性能分析

洛绒邓珠 刘潇如 杨佳 肖礼康 郭亮 魏占涛 周章洋 易早 刘艺 房雷鸣 熊政伟

洛绒邓珠, 刘潇如, 杨佳, 肖礼康, 郭亮, 魏占涛, 周章洋, 易早, 刘艺, 房雷鸣, 熊政伟. 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): 030104. doi: 10.11858/gywlxb.20240702
引用本文: 洛绒邓珠, 刘潇如, 杨佳, 肖礼康, 郭亮, 魏占涛, 周章洋, 易早, 刘艺, 房雷鸣, 熊政伟. 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): 030104. doi: 10.11858/gywlxb.20240702
LUORONG Dengzhu, LIU Xiaoru, YANG Jia, XIAO Likang, GUO Liang, WEI Zhantao, ZHOU Zhangyang, YI Zao, LIU Yi, FANG Leiming, XIONG Zhengwei. Tensile Behavior and Mechanical Performance Analysis of High-Strength Steels at Varying Strain Rates[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030104. doi: 10.11858/gywlxb.20240702
Citation: LUORONG Dengzhu, LIU Xiaoru, YANG Jia, XIAO Likang, GUO Liang, WEI Zhantao, ZHOU Zhangyang, YI Zao, LIU Yi, FANG Leiming, XIONG Zhengwei. Tensile Behavior and Mechanical Performance Analysis of High-Strength Steels at Varying Strain Rates[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030104. 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

doi: 10.11858/gywlxb.20240702
基金项目: 国家自然科学基金(U2230119);四川省自然科学基金(2022NSFSC0333);四川省杰出青年基金(22JCQN0005);2022年中央引导地方科技发展项目(2022ZYDF073)
详细信息
    作者简介:

    洛绒邓珠(1998-),男,硕士研究生,主要从事金属材料的结构分析与性能研究.E-mail:2926740401@qq.com

    通讯作者:

    熊政伟(1984-),男,博士,教授,主要从事高压物理研究. E-mail:zw-xiong@swust.edu.cn

  • 中图分类号: O344.3

Tensile Behavior and Mechanical Performance Analysis of High-Strength Steels at Varying Strain Rates

  • 摘要: 高强钢因强度高、塑性好、耐腐蚀性优异而得到广泛应用。然而,高强钢具有显著的应变率敏感性。为此,针对2种高强钢(Ultrafort 401和Ferrium S53钢),开展了不同应变率下(10−4~103 s−1)的拉伸试验,获得了屈服强度、抗拉强度、硬化指数等性能参量,并深入分析了其随应变率变化的规律。不同应变率下,Ferrium S53钢的拉伸性能始终优于Ultrafort 401钢,但两者却表现出不同的变化趋势。随着应变率的增加,Ultrafort 401钢的屈服强度和抗拉强度均增大,而Ferrium S53钢的屈服强度增大,抗拉强度先减小后增大。结合微观结构表征发现,Ferrium S53钢所具有的较高的屈服强度与其初始晶粒尺寸更小有关,2种高强钢的抗拉强度随应变率增加所表现出的不同变化趋势则与应变硬化响应差异有关。随着应变率的升高,Ultrafort 401钢的韧窝尺寸增大,而Ferrium S53钢的韧窝尺寸先减小后增大,说明2种高强钢的应变硬化水平随着应变率升高而呈现不同的变化趋势。研究结果为高强钢在不同加载条件下的力学性能评估提供了科学依据,对高强钢的工程应用具有一定的指导意义。

     

  • 图  拉伸试样示意图

    Figure  1.  Schematic diagram of the specimens used for tensile tests

    图  初始态Ferrium S53和Ultrafort 401钢的反极图、晶界图、取向差角直方图和晶粒尺寸直方图

    Figure  2.  Inverse pole figure (IPF), grain boundary diagrams, the distribution of misorientation angle and grain size of Ferrium S53 and Ultrafort 401 steel samples before deformation

    图  不同应变率下Ferrium S53和Ultrafort 401钢的工程应力-应变曲线

    Figure  3.  Engineering stress-strain curves at different strain rates for Ferrium S53 and Ultrafort 401 steels

    图  不同应变率下Ferrium S53和Ultrafort 401钢的屈服强度和抗拉强度

    Figure  4.  Tensile and yield strength curves at different strain rates for Ferrium S53 and Ultrafort 401 steels

    图  不同应变率下Ferrium S53和Ultrafort 401钢的均匀延伸率和屈强比

    Figure  5.  Uniform elongation and yield ratio curves at different strain rates for Ferrium S53 and Ultrafort 401 steels

    图  不同应变率下Ferrium S53钢和Ultrafort 401钢的硬化指数

    Figure  6.  Hardening indexes of Ferrium S53 and Ultrafort 401 steels at different strain rates

    图  不同应变率下Ferrium S53钢的断口形貌及对应的韧窝尺寸分布

    Figure  7.  Fracture morphology and distribution of corresponding dimple size at different strain rates for Ferrium S53 steel

    图  不同应变率下Ultrafort 401钢的断口形貌及对应的韧窝尺寸分布

    Figure  8.  Fracture morphology and distribution of corresponding dimple size at different strain rates for Ultrafort 401 steels

    图  不同应变率下2种高强钢的强塑性关系(虚线箭头表示应变率增大方向)

    Figure  9.  Relationships of strength-plasticity behavior of two high-strength steels at varying strain rates (The dashed arrows show the direction of increased strain rate)

    表  1  Ferrium S53和Ultrafort 401钢的元素组成

    Table  1.   Elemental composition of Ferrium S53 and Ultrafort 401 steels

    MaterialMass fraction/%
    CCrNiTiMoCoFe
    Ferrium S53 steel0.219.004.800.021.5013.0071.47
    Ultrafort 401 steel0.0212.008.200.802.005.3071.68
    下载: 导出CSV

    表  2  Ferrium S53和Ultrafort 401钢在不同应变率下的力学性能参量

    Table  2.   Mechanical parameters of Ferrium S53 and Ultrafort 401 steels at different strain rates

    Material $ \dot{\varepsilon } $/s−1 Tensile strength/MPa Yield strength/MPa Uniform elongation/% Yield ratio Hardening index
    Ferrium
    S53 steel
    10−4 1920.58 900.75 7.43 0.47 0.38
    10−3 1907.41 908.91 7.25 0.48 0.33
    10−2 1895.57 910.44 7.36 0.48 0.30
    7×10−2 1821.34 918.18 7.64 0.50 0.25
    10 1956.13 1145.16 8.13 0.59 0.41
    103 2069.75 1333.62 9.47 0.64 0.46
    Ultrafort
    401 steel
    10−4 944.68 711.59 2.78 0.75 0.13
    10−3 945.57 724.65 2.74 0.77 0.14
    10−2 953.93 759.52 2.81 0.80 0.15
    7×10−2 967.97 777.67 3.24 0.80 0.17
    10 1013.09 853.76 2.99 0.84 0.25
    103 1106.12 958.74 2.93 0.87 0.35
    下载: 导出CSV
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  • 收稿日期:  2024-01-02
  • 修回日期:  2024-03-01
  • 网络出版日期:  2024-04-01
  • 刊出日期:  2024-06-03

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