Q960E热影响粗晶区疲劳寿命与ΔKth值的关系分析
Research on relationship between ΔKth and fatigue life of heat-affected coarse grain zone in Q960E
-
摘要: 基于模拟焊接热循环试验及疲劳裂纹扩展试验,对动载结构用高强钢Q960E热影响粗晶区进行了多种应力幅值作用下的疲劳寿命研究.通过得到Paris方程建立了不同焊接热模拟工艺下疲劳裂纹扩展门槛值(ΔKth)随不同交变载荷下疲劳寿命值的近似线性关系.利用场发射扫描电镜中背散射衍射功能(EBSD)对疲劳裂纹扩展试样中的裂纹尖端进行了晶体学取向分析及扩展机制讨论.结果表明,在应力幅值ΔP固化后,疲劳寿命N随ΔKth的增大而增加,其延寿微观机理在于组织中的亚结构取向存在差异,所形成的大角度晶界(≥15°)可有效迫使裂纹转向,从而提高材料的疲劳寿命.Abstract: Based on the simulation of welding thermal cycle test and fatigue crack propagation test, the fatigue life on coarse grain heat affect zone of high strength steel Q960E, which acted as dynamic load structure, were investigated. The approximate linear relationship between fatigue crack propagation threshold value (ΔKth) by Paris equation under different welding thermal simulation technique and fatigue life under different cyclic loading were obtained. The crystallographic orientation analysis and expansion mechanism of the crack tip in the fatigue crack propagation specimen were discussed by using the electron backscatter diffraction (EBSD) in scanning electric mirror. The results showed that if stress amplitude ΔP was fixed, the fatigue life N increased with the growth of ΔKth. Its working micro-mechanism of prolonging life was due to the orientation differences of substructure, resulting in the formation of large Angle grain boundaries (≥ 15°), which effectively forced the crack to swerve, so as to improve the fatigue life of materials.
-
Keywords:
- high-strength steel /
- fatigue /
- ΔKth /
- high angle boundary
-
-
[1] Joseph C, Benedyk. Light metal in automotive applications[J]. Light Metal Age, 2000, 58(10):34-35. [2] Buch A. Fatigue strength calculation[M]. Switzerland:Trans Tech Publications, 1988. [3] Morrison M L, Buchanan R A, Liaw P K, et al. Four-point-bending-fatiguetreloy 105 bulk metallic glass[J]. Materials Science and Engineering, 2007, A 467:190-197. [4] 赵少汴. 抗疲劳设计手册[M]. 北京:机械工业出版社, 2015. [5] ASTM E606/E606M-12. Standard text method for strain-controlled fatigue testing[S]. 2012. [6] Bouyne E, Flower H M, Lindley T C, et al. Use of EBSD technique to examine microstructure and cracking in a bainitic steel[J]. Scripta Materialia, 1998, 39(3):295-300.[DOI: 10.1016/S1359-6462(98)00170-5] [7] 温永红, 唐荻, 武会宾, 等. F40级船板低温韧性机理[J]. 北京科技大学学报, 2008, 30(7):724-729. Wen Yonghong, Tang Di, Wu Huibin, et al. Low-temperature toughness characteristics of F40 hull structure steel[J]. Journal of University of Science and Technology Beijing, 30(7):724-729.[DOI: 10.3321/j.issn:1001-053X.2008.07.005] [8] 蒋金星, 唐荻, 武会宾, 等. E550海洋平台用钢二次裂纹扩展机理研究[J]. 材料工程, 2013, 6:35-39. Jiang Jinxing, Tang Di, Wu Huibin, et al. Analysis of propagation behavior of secondary cracks in the E550 offshore platform steel[J]. Journal of Materials Engineering, 2013, 6:35-39.[DOI: 10.3969/j.issn.1001-4381.2013.02.007] [9] 雷家峰, 刘羽宴, 杨锐, 等. 一种亚稳β钛合金中疲劳短裂纹穿晶扩展晶体学特征的EBSD研究[J]. 金属学报, 2002, 38(S1):272-276. Lei Jiafeng, Liu Yuyan, Yang Rui, et al. EBSD study on the crystallographic characteristics of fatigue crack propagation through a grain boundary in a metastable beta titanium alloy[J]. Acta Metallurgica Sinica, 2002, 38(S1):272-276. -
期刊类型引用(20)
1. 李碧晗,王亦奇,汪瑞军. 微弧离子沉积技术研究现状与应用进展. 焊接. 2025(02): 55-65 . 百度学术
2. 王明伟,高磊,郭昊亮,张文超. 纳米碳化钨涂层电火花沉积工艺参数试验研究. 热加工工艺. 2024(18): 74-78 . 百度学术
3. 李梦楠,韩红彪,李世康,侯玉杰. 旋转电极接触力对电火花沉积放电过程参数和材料转移的影响. 焊接学报. 2023(01): 71-77+132-133 . 本站查看
4. 李忠盛,吴护林,陈海涛,丛大龙,张敏,何庆兵,彭冬. 钢表面电火花沉积合成W-Mo高熔点复合涂层. 表面技术. 2023(10): 250-258 . 百度学术
5. 张孟卓,姚利松,何星. 电火花沉积在金属耐磨防腐领域的应用研究进展. 材料保护. 2023(11): 102-117 . 百度学术
6. 王彦芳,潘辰妍,石志强,何艳玲,韩彬. 块体高熵非晶合金的制备与表征综合实验教学探索与实践. 实验技术与管理. 2022(04): 142-146 . 百度学术
7. 郝丽敏,葛志宏,都宇. 内圆表面的电火花合金化强化修复装置研究. 现代制造工程. 2022(06): 63-67+84 . 百度学术
8. 何艳玲,王彦芳,斯佳佳,石志强. 电火花沉积Invar/非晶复合涂层的组织与性能. 金属热处理. 2022(11): 238-244 . 百度学术
9. 田芳,纪秀林,严春妍,赵建华. 循环气压结合超声辅助封孔剂封孔处理对铁基非晶合金涂层摩擦磨损性能的影响. 腐蚀与防护. 2022(11): 1-6+53 . 百度学术
10. 张勇,李丽,常青,王晓明,赵阳,朱胜,徐安阳,高宪伟. 电火花沉积技术研究现状与展望. 表面技术. 2021(01): 150-161 . 百度学术
11. 高继文,李永彬,黄晓望. 超声波冲击法对微弧火花沉积涂层性能的影响. 焊接. 2021(02): 52-56+64 . 百度学术
12. 王顺,童金钟,韩红彪. 一种电火花沉积接触力自动控制装置和沉积试验. 焊接学报. 2021(03): 42-47+100 . 本站查看
13. 王顺,韩红彪,李世康,李梦楠. 基于正交试验的圆柱电极参数对电火花沉积质量影响分析. 焊接学报. 2021(07): 37-43+100 . 本站查看
14. 刘宇,刘国良,苏全宁,曲嘉伟,王紫光,张生芳. 钛合金表面电火花沉积NiCr-3涂层性能的工艺规律研究. 电加工与模具. 2021(06): 26-30 . 百度学术
15. 赵航,高畅,伍晓宇,徐斌,雷建国. 超声辅助电火花粉末沉积WC-Ni金属陶瓷涂层的微观结构及摩擦学性能. 机械工程学报. 2021(23): 252-261 . 百度学术
16. 张建斌,张雷雷,刘航,容煜,焦凯,石玗. 电火花沉积修复铝合金组织与可降解性能. 表面技术. 2020(10): 224-232 . 百度学术
17. 葛志宏,邓静. 用于回转体外表面的电火花强化修复装置研究. 电加工与模具. 2020(06): 29-31+47 . 百度学术
18. 王彦芳,闫晗,李娟,孙胜越,宋增金,石志强. 电火花沉积FeCoCrNiCu高熵合金涂层的组织结构与耐蚀性. 表面技术. 2019(06): 144-149 . 百度学术
19. 马焰议,王海燕,张宇鹏,易耀勇,董福宇. Zr_(67.8)Cu_(24.7)Al_(3.43)Ni_(4.07)非晶合金激光焊接晶化控制及组织性能分析. 焊接学报. 2019(12): 138-142+167 . 本站查看
20. 钟鹏,司爽爽,宋增金,孙旭,石志强,王彦芳. 工艺参数对电火花沉积非晶层表面质量的影响. 热加工工艺. 2018(18): 125-128 . 百度学术
其他类型引用(10)
计量
- 文章访问数: 614
- HTML全文浏览量: 10
- PDF下载量: 105
- 被引次数: 30