航空铝合金材料低温裂纹扩展研究现状与展望

铝合金材料由于具有强度高和易加工等优势,已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裂纹扩展行为得到国内外学者和工程界的广泛关注和大 量研究。本文综述航空铝合金材料的低温裂纹扩展进展,梳理航空铝合金材料的低温裂纹扩展试验研究状况, 归纳低温断裂失效机理,总结低温裂纹扩展模型表征和寿命评估方法,并展望进一步研究方向,为航空铝合金 材料工程设计和应用提供帮助。

Research Status and Prospect on Cryogenic Crack Propagation of Aeronautic Aluminium-Alloys

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 cryogenic crack propagation of aeronautic aluminium-alloys has been greatly concerned by the engineering and academics overseas and domestically. The experiment researches on cryogenic crack growth of aeronautic aluminium-alloys in recent years were generally reviewed here, meanwhile, the cryogenic fracture failure mechanisms were analyzed. After that, the characterization model and life evaluation methodology on cryogenic crack growth of aeronautic aluminium-alloys were summarized and further research problems were clarified, which provides a technical support for engineering design and application of aeronautic aluminium-alloys.