Study on SAF 2707HD fatigue performance in rotating bending

Abstract

Abstract: The rotational bending fatigue test of SAF 2707HD duplex stainless steel was carried out. The fatigue limit is determined by the up-and-down method, and the stress-lifetime (S-N) curve is hence drawn according to the experimental data. The fatigue fracture surface of the specimen is observed by scanning electron microscope (SEM), and the type of fatigue crack initiation and the corresponding fracture mechanism are analyzed respectively. Statistical data show that the fracture caused by crack origins on the surface of the specimen occurs basically at or within in 10⁵ cycles, while the fracture caused by internal crack origins occurs basically at about 10⁶ cycles, with a difference of nearly one order of magnitude. For this reason, the fatigue life is then predicted by using the finite element software. All predicted results are compared with the experimental S-N curve, which confirms the reliability of our fatigue life analysis.

Key words: super duplex stainless steel SAF 2707HD, fatigue life, fatigue fracture surface, numerical simulation

CLC Number:

O317

YU Shu-rong, CHENG Yue, HE Yan-ni, SONG Wei. Study on SAF 2707HD fatigue performance in rotating bending[J]. Journal of Lanzhou University of Technology, 2021, 47(2): 168-172.

References

[1] 朱禄发.316L、2205不锈钢的海水腐蚀磨损行为研究[D].成都:成都理工大学,2016.
[2] 梁瑞,王学平.含内裂纹海洋平台压力容器的疲劳寿命分析[J].兰州理工大学学报,2016,42(6):70-73.
[3] KIM S T,LEE I S,KIM J S,et al.Investigation of the localized corrosion associated with phase transformation of tube-to-tube sheet welds of hyper duplex stainless steel in acidified chloride environments[J].Corros Sci,2012,64:164-173.
[4] LI H,ZHOU E,ZHANG D.Microbiologically influenced corrosion of 2707 hyper-duplex stainless steel by marine pseudomonas aeruginosa biofilm[J].Scientific Reports,2016,6:20190.
[5] 刘杰.耐蚀性能优异的SAF 2707 HD双相钢[N].世界金属导报,2016-04-12(B14)
[6] 刘富强,高杰,叶丙义,等.变形量和固溶处理对S32707双相不锈钢组织和性能的影响[J].金属热处理,2017,42(6):123-126.
[7] EIDHAGEN J,SANCHEZ A.Case Stories in Refinery and Localized Corrosion Testing of UNS S32707 in Chlorides[C]//Corrosion.NACE International,2014.
[8] ZHANG B,JIANG Z,LI H,et al.Precipitation behavior and phase transformation of hyper duplex stainless steel UNS S32707 at nosetemperature[J].Materials Characterization,2017,129:31-39.
[9] WANG J,CHEN W L,MENG H J,et al.Influence of sigma phase on corrosion and mechanical properties of 2707 hyper-duplex stainless steel aged for short periods[J].Journal of Iron and Steel Research International,2019,26(5):452-461.
[10] 朴小东.航空导管旋转弯曲疲劳实验系统设计与实践[D].沈阳:沈阳航空航天大学,2017.
[11] 杨广明.升降法测定齿轮的弯曲疲劳极限[J].机械传动,2015(8):186-190.
[12] 俞树荣,孟恺,李淑欣.空气和腐蚀环境下双相不锈钢SAF2507的疲劳性能[J].材料工程,2015,43(1):77-81.
[13] 郭军,杨卯生,卢德宏,等.Cr4Mo4V轴承钢旋转弯曲疲劳寿命及疲劳裂纹萌生机理[J].材料工程,2019,47(7):134-143.
[14] 丁灿灿,曹燕光,杨俊伟,等.奥氏体化温度对51CrV4钢组织及疲劳性能的影响[J].钢铁研究学报,2018,30(12):991-997.
[15] KRISHNAN K N.Mechanism of Corrosion Fatigue in Super Duplex Stainless Steel in 3.5 percent NaCI Solution[J].International Journal of Fracture,1997,88(3):205-213.
[16] 钟原.双相不锈钢在化工设备设计中的运用[J].中国石油石化,2017(8):72-73.