摘要
High cyclic fatigue(HCF)behavior of an AA2139alloy belonging to Al-Cu-Mg-Ag system in T6and T840conditionswas examined.The T840treatment involving cold rolling with a40%reduction prior to peak ageing provides an increase in tensilestrength compared with the T6condition.However,fatigue lifetime for two material conditions was nearly the same since there isweak effect of thermomechanical processing on micro-mechanisms of crack initiation and growth.
研究Al-Cu-Mg-Ag合金系AA2139合金在T6和T840条件下的高周疲劳行为。T840处理是在峰时效前进行压下量为40%的冷轧。与T6态相比,T840可提高合金的拉伸强度。但是两种条件下的疲劳寿命基本相同,因为热力加工过程对裂纹的萌生和扩展的影响较小。
基金
a joint project between USATU (Ufa State Aviation Technical University) and UMPO (Ufa Engine Industrial Association), which is entitled “Elaboration and industrial development of high-precision shaping coordinated technologies and superficial hardening of responsible details from Al-alloys with heightened constructional energy efficiency”. This project was implemented under contract No. 40/10-30976/NCh-NCh01-13-KhG
the Ministry of Education and Science of the Russian Federation (contract No.02.G25.31.0010 between UMPO and the Ministry of Education and Science of the Russian Federation) via the Resolution of the Russian Federation Government No.218 from April 9,2010
