| MECHANICAL ENGINEERING |
|
|
|
|
|
Experimental research on real-time ultrasonic detection of pure metal creep |
| YUAN Keyi, HAN Zandong, ZHONG Yuexian, CHEN Yifang |
| Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract Stress-free, room temperature creep specimens are used in almost all ultrasonic creep testing experimental research. However, the ultrasonic testing parameters for this condition (stress-free and room temperature) will differ from those for realistic conditions with the creep stress and higher temperatures. These differences will influence the creep detection accuracy. Tests in more realistic conditions are conducted using pure lead for continuous creep experiments with real-time ultrasonic detection used during the creep process and then during the relaxation process. The real-time parameter variations are plotted versus creep time for some parameters such as the attenuation, acoustic velocity, and time attenuation. The results show that the detection sensitivities of the creep ultrasonic testing parameters for realistic conditions are higher than for stress-free conditions. Thus, if stress-free ultrasonic testing parameter measurements are used to assess the creep, the actual measured parameter values must be corrected to accurately assess the creep. In addition, the experiments show that the time-attenuation parameter has the same type of variations as the attenuation parameter with the increased creep time so the objective dimensions do not need to measure to calculate the time-attenuation parameter, which is much easier, especially in practical ultrasonic testing. This result shows that the time-attenuation parameter can be used in place of the attenuation parameter in metal creep ultrasonic testing.
|
| Keywords
ultrasonic testing
creep
attenuation
acoustic velocity
|
|
|
|
Issue Date: 15 July 2015
|
|
|
[1] 涂善东, 轩福贞, 王卫泽. 高温蠕变与断裂评价的若干关键问题 [J]. 金属学报, 2009, 45(7): 781-787.TU Shandong, XUAN Fuzhen, WANG Weize. Some critical issues in creep and fracture assessment at high temperature [J]. Acta Metallurgica Sinica, 2009, 45(7): 781-787.(in Chinese)
[2] Hong S, Lee S. Mechanism of dynamic strain aging and characterization of its effect on the low-cycle fatigue behavior in type 316L stainless steel [J]. Journal of Nuclear Materials, 2005, 340: 307-314.
[3] 席与珩, 刘丽梅, 崔雄华, 等. 锅炉导汽管材质状态和蠕变剩余寿命评估 [J]. 热力发电, 2011, 40(8): 8-11.XI Yuheng, LIU Limei, CUI Xionghua, et al. Evaluation of material state and creep residual life of steam conduit for boilers [J]. Thermal Power Generation, 2011, 40(8): 8-11. (in Chinese )
[4] 尚丽娟, 田素贵, 王晓亮, 等. 403Nb钢的组织特征与蠕变行为 [J]. 材料热处理学报, 2011, 32(8): 79-83.SHANG Lijuan, TIAN Sugui, WANG Xiaoliang, et al. Microstructure and creep behavior of 403Nb steel [J]. Transactions of Materials and Heat Treatment, 2011, 32(8): 79-83. (in Chinese)
[5] 高宏波, 谢守明, 赵杰, 等. 在役电站锅炉导汽管组织状态评估与剩余寿命预测 [J]. 热力发电, 2004, 33(6): 71-74.GAO Hongbo, XIE Shouming, ZHAO Jie, et al. Microstructure state evaluation and residual life prediction for steam conduit of boilers in service [J]. Thermal Power Generation, 2004, 33(6): 71-74. (in Chinese)
[6] 束国刚, 李益民, 梁昌乾, 等. 10CrMo910 钢薄壁主汽管θ法寿命评估及其应用研究 [J]. 热力发电, 2000, 29(4): 36-41.SU Guogang, LI Yimin, LIANG Changqian, et al. The experimental and theoretical study on the application of the modified θ projection equation to the remaining creep life assessment of 10CrMo910 steel in Niangziguan Power Plant [J]. Thermal Power Generation, 2000, 29(4): 36-41. (in Chinese)
[7] Neubauer B, Wedel U. NDT: Replication avoids unnecessary replacement of power plant components [J]. Power Engineering(Barrington, Illinois), 1984, 88(5): 44-47.
[8] DL/T652 1998. 金相复型技术工艺导则 [S]. 北京: 中华人民共和国电力工业部, 1998.DL/T652 1998. Technical Guidelines for Metallurgic Replica [S]. Beijing: Ministry of Power Industry of the People's Republic of China, 1998. ( in Chinese)
[9] Spostito G, Ward C, Cawley P, et al. A review of non-destructive techniques for the detection of creep damage in power plant steels [J]. NDT&E International, 2010, 43: 555-567.
[10] Hiroaki H, Nobukazu I, Takuya I, et al. Ultrasonic creep damage detection by frequency analysis for boiler piping [J]. Journal of Pressure Vessel Technology, 2007, 129: 713-718.
[11] Kim D Y, Kim H J, Song S J, et al. Ultrasonic method for prediction of residual life of creep damaged materials [C]//Thompson D O, Chimenti D E, eds. AIP Conference Proceedings. Melville, Canada: Amer Inst Physics, 2009, 1096: 1402-1409.
[12] Mannan S L, Mathew M D. Creep properties of service-exposed alloy 625 after resolution annealing treatment and microstructural assessment using ultrasonic waves [C]//Sih G C, Tu S T, Wang Z D, eds. Fracture Mechanics Symposium. Shanghai, China: East China Univ of Science and Technology Press, 2009: 23-30.
[13] Yoneyama H, Nakashiro H, Murakami M, et al. Assessment for creep damages by ultrasonic techniques [J]. IHI Engineering Review, 1989, 22(1): 1-6.
[14] Gomez A T, Riera-Franco S E, Gallego-Juarez J A. Ultrasonic evaluation of creep damage in steel [J]. Ultrasonics, 1993, 31(3): 155-159.
[15] Magnusson H. Creep Modeling of Particle Strengthened Steels [D]. Stockholm, Sweden: Department of Materials Science and Engineering, Royal Institute of Technology, 2007. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2015,
Vol. 55
