摘要
采用低周疲劳性能测试研究了不同压力对Al-5.0Cu-0.4Mn合金低周疲劳塑性应变能的影响。结果表明,不同压力下挤压铸造Al-5.0Cu-0.4Mn合金的塑性应变能密度均随着循环周次的增加而减小,并且压力越大,合金的塑性应变能密度下降的幅度越大;合金的塑性应变能密度跟循环应变幅的大小相关,同一应变幅下,压力下成形的合金塑性应变能密度更大;压力下塑性应变能密度差别在低寿命区比高寿命区大;压力越大,合金抵抗低周疲劳破坏的能力越好。
Influence of applied pressure on the elastic strain energy of A1-5.0Cu-0.4Mn alloys prepared by squeeze casting was examined by low cycle fatigue testing. The results show that the elastic strain energy density of the alloys are decreased during the cycle process, and with the increase of applied pres- sure, elastic strain energy density is decreased. The strain energy density of the alloy is closely related to the degree of strain amplitude. The alloy prepared under pressure exhibits a larger strain energy density at the same strain amplitude. The difference of strain energy density in low fatigue life zone is larger than that in high fatigue life zone. Meanwhile, the low cycle fatigue life is longer with a higher pressure.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第8期743-746,共4页
Special Casting & Nonferrous Alloys
基金
GD-NSFC联合基金项目(U1034001)
国家科技支撑计划项目(2011BAE21B00)
省部产学研重点专项(2009A090100026)
广东省科技攻关项目(2008A010300003)
关键词
铝合金
低周疲劳
挤压铸造
塑性应变能
Aluminum Alloys, Low Cycle Fatigue, Squeeze Casting, Elastic Strain Energy Density
