航空铝合金材料低温疲劳研究进展

Research Progress on Cryogenic Fatigue of Aeronautic Aluminium Alloy

铝合金材料由于具有强度高和易加工等优势,被广泛应用于航空工程领域。低温是航空铝合金材料使用中不可避免的环境因素,低温下航空铝合金材料的疲劳行为也受到国内外学者和工程界的高度关注。综述了近年来航空铝合金材料的低温疲劳试验研究,分析了低温疲劳失效机理,归纳了航空铝合金材料的低温疲劳模型表征和寿命评估方法,并展望了需要在试验、失效机理、模型表征和寿命预测方面进一步研究的问题,为航空铝合金材料的工程设计和应用提供帮助。

Aluminium alloys have been widely used in aeronautical engineering due to the advantages of high strength and easy processing.Low temperature is an inevitable environmental factor in using of aluminium alloys,and the cryogenic fatigue of aeronautic aluminium alloys has been greatly concerned by the engineering and academics overseas and domestically.The experiment researches on cryogenic fatigue of aeronautic aluminium alloys in recent years were generally reviewed here,meanwhile,the cryogenic fatigue failure mechanisms were analyzed.After that,the characterization model and life evaluation methodology on cryogenic fatigue of aeronautic aluminium alloys were summarized,and further research problems in experiment,failure mechanism,characterization model and life prediction were pointed out,which provides a technical support for engineering design and application of aeronautic aluminium alloys.