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316L-2Cr13多层不锈钢复合板相对于全马氏体/奥氏体多层钢疲劳性能的提升

周鑫 马景平 蒋小霞 曹睿 闫英杰

周鑫, 马景平, 蒋小霞, 等. 316L-2Cr13多层不锈钢复合板相对于全马氏体/奥氏体多层钢疲劳性能的提升[J]. 复合材料学报, 2023, 40(11): 6363-6373. doi: 10.13801/j.cnki.fhclxb.20221208.002
引用本文: 周鑫, 马景平, 蒋小霞, 等. 316L-2Cr13多层不锈钢复合板相对于全马氏体/奥氏体多层钢疲劳性能的提升[J]. 复合材料学报, 2023, 40(11): 6363-6373. doi: 10.13801/j.cnki.fhclxb.20221208.002
ZHOU Xin, MA Jingping, JIANG Xiaoxia, et al. Improvement of fatigue properties of 316L-2Cr13 multilayer steel compared with all martensite/austenitic multilayer steel[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6363-6373. doi: 10.13801/j.cnki.fhclxb.20221208.002
Citation: ZHOU Xin, MA Jingping, JIANG Xiaoxia, et al. Improvement of fatigue properties of 316L-2Cr13 multilayer steel compared with all martensite/austenitic multilayer steel[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6363-6373. doi: 10.13801/j.cnki.fhclxb.20221208.002

316L-2Cr13多层不锈钢复合板相对于全马氏体/奥氏体多层钢疲劳性能的提升

doi: 10.13801/j.cnki.fhclxb.20221208.002
基金项目: 国家自然科学基金(52175325;51961024;52071170)
详细信息
    通讯作者:

    曹睿,博士,教授,博士生导师,研究方向为金属材料失效与断裂 E-mail: caorui@lut.edu.cn

  • 中图分类号: TG335.81;TB331

Improvement of fatigue properties of 316L-2Cr13 multilayer steel compared with all martensite/austenitic multilayer steel

Funds: National Natural Science Foundation of China (52175325; 51961024; 52071170)
  • 摘要: 采用升降法与成组法,对奥氏体不锈钢(316L)-马氏体不锈钢(2Cr13)多层不锈钢复合板、全316L及全2Cr13多层钢进行了应力比Rs=0.1的拉拉疲劳试验,获得了应力-寿命(S-N)曲线,且对断口进行了分析。结果表明:由于轧制态组织不均匀,多层钢的S-N曲线出现明显的水平段,有确定的疲劳极限,且316L-2Cr13多层不锈钢复合板的疲劳性能明显优于全316L或全2Cr13多层钢,在应力比为0.1时,疲劳强度可达286 MPa。316L-2Cr13多层不锈钢复合板综合组成材料的优点,2Cr13提供了较高的强度使试样裂纹扩展门槛值较高,从而防止试样快速起裂,316L提供了优异的塑性,阻碍裂纹的扩展。多层钢疲劳断口由起裂源区、裂纹扩展区、瞬断区组成,且裂纹都在应力集中处形核。在裂纹扩展区中,大量的疲劳辉纹存在于316L层,随后在疲劳辉纹中逐渐形成韧窝;而2Cr13层中观察到脆性穿晶断裂,在裂纹扩展后期主要由大块解理面构成。在316L-2Cr13多层不锈钢复合板的瞬断区中,2Cr13层呈现大量的解理面,316L则由大量韧窝构成,层与层之间由剪切韧窝连接。

     

  • 图  1  轧制前原材料力学性能与多层钢轧制过程:(a) 固溶态316L;(b) 退火态2Cr13;(c) 多层钢轧制过程

    Figure  1.  Mechanical properties of raw materials before rolling and rolling process of multilayer steel: (a) Solid solution 316L; (b) As-annealed 2Cr13; (c) Rolling process of multilayer steel

    图  2  3种多层钢的宏观组织形貌:(a) 316L-2Cr13多层钢;(b) 全316L多层钢;(c) 全2Cr13多层钢

    Figure  2.  Macro microstructure morphologies of three kinds of multilayer steels: (a) 316L-2Cr13 multilayer steel; (b) All 316L multilayer steel; (c) All 2Cr13 multilayer steel

    图  3  多层钢拉伸和疲劳试样尺寸

    R—Radius

    Figure  3.  Tensile and fatigue specimen dimensions of multilayer steel

    图  4  多层钢的组织形貌:(a) 316L-2Cr13多层钢;(b) 全316L多层钢;(c) 全2Cr13多层钢

    A—Austenite; M—Martensite; F—Ferrite

    Figure  4.  Microstructures of multilayer steel: (a) 316L-2Cr13 multilayer steel; (b) All 316L multilayer steel; (c) All 2Cr13 multilayer steel

    图  5  (a) 不同材料组成下多层钢应力-应变曲线;(b) 平均抗拉强度、屈服强度和延伸率对比;((c)~(e)) 每种试样的具体应力-应变曲线

    Figure  5.  (a) Stress-strain curves of multilayer steel under different material compositions; (b) Comparison of average tensile strength, yield strength and elongation; ((c)-(e)) Specific stress-strain curves of each sample

    图  6  疲劳试验载荷升降图:(a) 316L-2Cr13多层钢;(b) 全316L多层钢;(c) 全2Cr13多层钢

    Figure  6.  Fatigue test load up and down diagram: (a) 316L-2Cr13 multilayer steel; (b) All 316L multilayer steel; (c) All 2Cr13 multilayer steel

    图  7  不同材料组成下多层钢应力-寿命(S-N)曲线对比

    Figure  7.  Comparison of stress-life (S-N) curves of multilayer steel with different material compositions

    图  8  热处理前后316L-2Cr13多层不锈钢性能对比:(a) 应力-应变曲线;(b) S-N曲线

    Figure  8.  Performance comparison of 316L-2Cr13 multilayer steel before and after heat treatment: (a) Stress-strain curves; (b) S-N curves

    图  9  316L-2Cr13多层不锈钢复合板疲劳断口形貌

    Figure  9.  Fatigue fracture morphologies of 316L-2Cr13 multilayer steel

    图  10  全316L多层钢疲劳断口形貌

    Figure  10.  Fatigue fracture morphologies of all 316L multilayer steel

    图  11  全2Cr13多层钢疲劳断口形貌

    Figure  11.  Fatigue fracture morphologies of all 2Cr13 multilayer steel

    表  1  奥氏体不锈钢(316L)-马氏体不锈钢(2Cr13) (316L-2Cr13)组成材料的化学成分

    Table  1.   Chemical composition of Austenitic stainless steel (316L)-Martensitic stainless steel (2Cr13) (316L-2Cr13) composition materials wt%

    MaterialCSiMnCrNiCuMoN
    Solid solution 316L0.02290.47101.396016.590010.14000.26602.11000.0116
    As-annealed 2Cr130.18000.63000.380013.3600 0.1000
    下载: 导出CSV

    表  2  具体轧制工艺

    Table  2.   Specific rolling process

    Temperature/℃MaterialLayerRolling pass
    1130316L-2Cr13177
    1130316L177
    11302Cr13177
    下载: 导出CSV

    表  3  材料的基本力学性能和Basquin方程中的疲劳强度系数与指数

    Table  3.   Basic mechanical properties of materials and fatigue strength coefficient and index in Basquin equation

    MaterialTensile strength σt/MPaYield strength σy/MPaElongation
    rate δ/%
    Conditional fatigue
    limit σ0.1/MPa
    Fatigue strength
    index b
    Fatigue strength coefficient σf
    316L-2Cr131147 74323288−0.05476609.6576
    All 316L 685 53164247−0.03320391.2894
    All 2Cr131939113913245−0.08543884.2924
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-11-07
  • 修回日期:  2022-11-28
  • 录用日期:  2022-11-30
  • 网络出版日期:  2022-12-09
  • 刊出日期:  2023-11-01

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