(1. 太原工業(yè)學(xué)院 機(jī)械工程系，太原 030008；
2. 太原理工大學(xué) 材料科學(xué)與工程學(xué)院，太原 030024)
摘 要: 利用聲發(fā)射技術(shù)對AZ31鎂合金在不同環(huán)境(腐蝕、疲勞載荷)下進(jìn)行實(shí)時(shí)監(jiān)測分析，研究表明：腐蝕疲勞耦合作用下與疲勞載荷作用下相比，鎂合金聲發(fā)射波形都表現(xiàn)出周期性、臺(tái)階性及瞬斷突發(fā)型等特點(diǎn)，但不同的是二者周期性波形形狀不同，腐蝕疲勞耦合作用下鎂合金聲發(fā)射周期性波形平均波幅降低50%、波幅臺(tái)階性現(xiàn)象趨緩。這主要是由于周圍腐蝕環(huán)境的存在有助于緩解疲勞損傷的累積。
關(guān)鍵字: AZ31鎂合金；聲發(fā)射波形；腐蝕環(huán)境；疲勞載荷
（1. Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China;
2. College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China）
Abstract:AE technology, which is known for nondestructive and in-service monitoring through corrosive environment, was used to monitor the AZ31 magnesium alloy under different environment (corrosion, fatigue loading) real-timely. The results show that, under the coupled action of corrosion fatigue, compared with that under fatigue loading only, the AE waveforms displays some characteristics, such as cyclicity, steps and transient breaking. But their shapes are different. Due to the presence of the ambient corrosive environment, which helps to mitigate the accumulation of fatigue damage, the average amplitude of periodic waveform under the coupled action reduces by 50%, and the step characteristic becomes slow.
Key words: AZ31 magnesium alloy; acoustic emission waveform; corrosive environment; fatigue loading
