Stress Measurement of Ferromagnetic Materials by using Magnetoacoustic Emission (MAE)
Magnetoacoustic emission (MAE) is a newly developed magnetic nondestructive testing (NDT) method with a short history of 30 years. MAE is promising in the early characterization of damage and the evaluation of the residual stress of ferromagnetic materials in engineering. However,this technique is still in its early stage and requires further development. The mechanism of MAE and its influence factors are still under investigation. Quantitative NDT is difficult because of the lack of robust theoretical bases and models. In this paper, we investigated the influence factors of MAE signals systematically and established a mathematical model to describe these influences. The special design of the specimen and the precise control of experimental conditions are the key points for obtaining reasonable experimental results and for developing the model. A methodology for stress assessment was then developed on the basis of the proposed model and was verified by using the pure bending test.Results show that the stress within a measureable depth of 4 mm can be evaluated and that the maximum testing error is 30%.
Ferromagnetic material Magnetoacoustic emission nondestructive stress assessment mathematical model
Fei Su Yonghui Gong
Beijing University of Aeronautics and Astronautics, P.R.China, 100191
国际会议
北京
英文
383-383
2014-10-19（万方平台首次上网日期，不代表论文的发表时间）