化学铣切铝合金的疲劳性能  

Fatigue feature of chemical milling on aluminium alloy

作　　者：岳俊[1] 李娜[1] 

机构地区：[1]成都飞机工业(集团)公司制造工程部,四川成都610092

出　　处：《中国测试》2009年第4期115-117,共3页China Measurement & Test

摘　　要：铝合金的化学铣切已经成为航空与航天工业零件成形的可靠加工方法,尤其是在加工飞机蒙皮时要比用传统的机械加工方法优越得多。但化学铣切在一定程度上会降低材料的疲劳寿命,是由于存在于金属板材表面抗疲劳的残余压应力在化铣过程中释放后造成的。因此有必要考虑化铣工艺对飞机疲劳寿命的影响。通过对化学铣切的2024-T3包铝疲劳性能的研究,以及对大型薄形试片疲劳试验方法的探讨,确定该化学铣切工艺完全能满足民用飞机疲劳寿命的要求。Chemical milling on aluminium alloys has become a credible machining method for machining parts in the aviation and spaceflight industry. It is better than the tradition mechanism machining method in milling plane skin especially. However, the chemical milling can drop the fatigue life of materials, since residual compress stress on metal surface is released in this miffing. Thus, the effect of the chemical milling on the plane fatigue life must be understood. The fatigue capability of chemical milling clad 2024-T3 has been studied, and some fatigue experiment methods on big and thin samples have been also investigated. The results ascertained that this chemical miUing can satisfy the requirement of the civil aviation fatigue life.

关 键 词：疲劳 化学铣切 铝合金 断裂 WOHLER曲线 

分 类 号：TQ050.91[化学工程] TG113.2[金属学及工艺—物理冶金]