高级检索

P92钢630 ℃下的高温低周疲劳行为分析

荆洪阳1,2,苏定邦1,2,徐连勇1,2,赵雷1,2

荆洪阳1,2,苏定邦1,2,徐连勇1,2,赵雷1,2. P92钢630 ℃下的高温低周疲劳行为分析[J]. 焊接学报, 2018, 39(7): 33-36. DOI: 10.12073/j.hjxb.2018390170
引用本文: 荆洪阳1,2,苏定邦1,2,徐连勇1,2,赵雷1,2. P92钢630 ℃下的高温低周疲劳行为分析[J]. 焊接学报, 2018, 39(7): 33-36. DOI: 10.12073/j.hjxb.2018390170
shu
JING Hongyang1,2, SU Dingbang1,2, XU Lianyong1,2, ZHAO Lei1,2. Study on high temperature low cycle fatigue behavior of P92 steel under 630℃[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 33-36. DOI: 10.12073/j.hjxb.2018390170
Citation: JING Hongyang1,2, SU Dingbang1,2, XU Lianyong1,2, ZHAO Lei1,2. Study on high temperature low cycle fatigue behavior of P92 steel under 630℃[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 33-36. DOI: 10.12073/j.hjxb.2018390170
shu

P92钢630 ℃下的高温低周疲劳行为分析

  • 1. 天津大学 材料科学与工程学院, 天津 300072;
    2. 天津市现代连接技术重点试验室, 天津 300072

基金项目: 国家自然科学基金资助项目（51475326）

Study on high temperature low cycle fatigue behavior of P92 steel under 630℃

  • 1. School of Materials Science and Engineering Tianjin University,Tianjin 300072, China;
    2. Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China

摘要

    摘要
  • 摘要: P92钢作为新一代耐热钢，其服役温度正随着超超临界机组的不断推广而逐渐提高，而高温疲劳性能对保证电厂的安全运行具有重大作用.文中通过P92钢630℃下的疲劳试验，研究了其在不同应变幅和应变速率下的疲劳寿命以及应力—应变关系，并结合断口形貌分析了P92钢的断裂机理.结果表明，P92钢属于高温循环软化材料，其疲劳寿命随塑性应变幅的增大而呈指数下降，同时应变速率的增大会导致其疲劳寿命的增大.P92钢疲劳断口分为疲劳源区、裂纹扩展区以及断裂区.高应变幅下蠕变孔洞和二次裂纹的增加是导致其疲劳寿命降低的主要原因.
    Abstract: P92 steel has been widely applied in high temperature components of power plants. With the development of the ultra supercritical power plants, the operating temperature of P92 steel has been promoted. The high temperature fatigue performance of P92 steel has a significant effect on the safety of power plants. Therefore, the fatigue test of P92 steel under 630℃ was conducted, and the effects of the strain amplitude and strain rate on the fatigue life was studied. In addition, the fatigue fracture mechanism for P92 steel was investigated by the fracture morphology analysis. The results indicated that P92 steel exhibited a cyclic softening behavior at high temperatures. The fatigue life decreased exponentially with the increasing of plastic strain amplitude. In contrast, the improvement of strain rate would promote the fatigue life. Furthermore, the fatigue fracture surface of P92 steel consisted of three zones, including fatigue source region, fatigue crack growth zone and fracture zone. The decrease of fatigue life at high strain amplitude was mainly induced by the increase of creep cavities and secondary cracks.
    • HTML全文
    • 参考文献(9)
  • [1] 李聪成, 荆洪阳, 徐连勇, 等. 蠕变疲劳交互作用下裂纹萌生的有限元模拟[J]. 焊接学报. 2016, 37(08):5-8. Li Congcheng, Jing Hongyang, Xu Lianyong, et al. Numerical simulation of crack initiation under creep-fatigue interaction in P92 steel[J]. Transactions of the China Welding Institution, 2016, 37(08):5-8.
    [2] Wang N, Tu S T, Xuan F Z. A novel prediction method of creep rupture life of 9-12% chromium ferritic steel based on abductive network[J]. Engineering Failure Analysis, 2013, 31:302-310.
    [3] Samuel E I, Choudhary B K, Palaparti D P R, et al. Creep deformation and rupture behaviour of P92 steel at 923K[J]. Procedia Engineering, 2013, 55:64-69.
    [4] Chang Y, Xu H, Ni Y, et al. The effect of multiaxial stress state on creep behavior and fracture mechanism of P92 steel[J]. Materials Science and Engineering:A, 2015, 636:70-76.
    [5] 毛雪平, 陆道纲, 徐鸿, 等. P92钢高温低周疲劳的实验研究[J]. 原子能科学技术. 2010, 44(10):1212-1216. Mao Xueping, Lu Daogang, Xu Hong, et al. Experimental study on elevated temperature low cycle fatigue of P92 steel[J]. Atomic Energy Science and Technology, 2010, 44(10):1212-1216.
    [6] Kannan R, Sankar V, Sandhya R, et al. Comparative evaluation of the low cycle fatigue behaviours of P91 and P92 steels[J]. Procedia Engineering, 2013, 55:149-153.
    [7] 张振, 胡正飞, 范立坤, 等. 国产P92钢低周疲劳性能与断裂特征研究[J]. 动力工程学报. 2014, 34(04):330-336. Zhang Zhen, Hu Zhengfei, Fan Likun, et al. Low cycle fatigue and fracture properties of domestic P92 heat-resistant steels[J]. Journal of Chinese Society of Power Engineering, 2014, 34(04):330-336.
    [8] Luo, Y R, Huang, C X, Tian, R H. Effect of strain rate on low cycle fatigue behaviors of high-strength structural steel[J]. Journal of Iron and Steel Research, 2013, 20(7):50-56.
    [9] Park J S, Kim S J, Lee C S. Effect of W addition on the low cycle fatigue behavior of high Cr ferritic steels[J]. Materials Science and Engineering:A, 2001, 298(1-2):127-136.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  760
  • HTML全文浏览量:  3
  • PDF下载量:  58
  • 被引次数: 0
出版历程
  • 收稿日期:  2016-12-14

目录

摘要
HTML全文
    参考文献(9)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回

    网站版权 © 焊接杂志社焊接学报编辑部电话：0451-86323218地址：哈尔滨市松北区创新路2077号

    本系统由 北京仁和汇智信息技术有限公司 开发  百度统计