Magnetic Memory Testing of Elastic-Plastic Deformation State of Low-Alloy Steel
-
摘要: 采用压力容器常用钢Q345R制作拉伸试件。在拉伸过程中分别进行在线检测和离线检测，研究试件表面磁场强度HP、磁场梯度K及强屈评价因子最大值mmax是否可用来判断试件的弹塑性状态。结果表明，在线检测时，可利用HP曲线形状和mmax大小来判断试件的弹塑性状态;离线检测时，HP信号强度和Kmax大小在屈服前后有较大差别，可作为试件弹塑性状态的判据。Abstract: The tensile samples were made of Q345R steel which was used commonly in stress vessel. The variation of low-alloy steels surface magnetic field intensity HP, magnetic field gradient K and mmax according to tensile stress and plastic strain were studied during online and offline tensile testing, so as to examine whether these parameters could be utilized to determine their deformation state. The results suggested that the deformation state could be identified by the shape of HP signals and the magnitude of mmax during online inspection, while the intensity of HP signals and Kmax could be used during offline inspection.
-
-
[1] Kostin V N, Kadrov A V, Kuskov A E. Magnetic properties of a material used to estimate elastic and plastic strains of ferrite-pearlite steels［J］. Russian Journal of Nondestructive Testing,2005,41(10):632-639. [2] 董丽虹，徐滨士，董世运，等.金属磁记忆信号表征铁磁材料变形的基础研究［J］.装甲兵工程学院学报,2010,24(3):68-71. [3] 陈星，刘昌奎，陶春虎，等.金属材料拉伸损伤的磁记忆表征［J］.无损检测,2009,31(5):345-348. [4] Li L M, Yang E, Chen X. Magnetic field aberration induced by cycle stress［J］. Journal of Magnetism and Magnetic Materials,2007,312:72-77. [5] Shi C L, Dong S Y, Xu B S. Magnetic memory testing of static-tension steel sample for life evaluation in component remanufacturing［C］. Introduction for the 4th World Congress on Maintenance, China, Hainan,2008. [6] 王丹，董世运，徐滨士，等.静载拉伸45钢材料的金属磁记忆信号分析［J］.材料工程,2008(8):77-80. [7] Anatoly D.金属磁记忆法诊断管路、设备和结构［C］.闫家魁，张友人，李廷高，等，译.莫斯科：动力诊断公司,2003. [8] 尹大伟，董世运，徐滨士，等.特种钢的磁记忆检测研究［J］.仪器仪表学报,2006,27(11):1483-1488.
计量
- 文章访问数: 3
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
