压力对Al-5.0Cu-0.4Mn合金疲劳塑性应变能的影响

程佩; 汪先送; 林波; 范建磊; 张卫文

doi:10.15980/j.tzzz.2012.08.025

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压力对Al-5.0Cu-0.4Mn合金疲劳塑性应变能的影响
Influence of Pressure on the Elastic Strain Energy of Al-5.0Cu-0.4Mn Alloy in Low Cycle Fatigue
2012年32卷第8期页码：743-746
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.08.025

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[1]程佩,汪先送,林波,范建磊,张卫文.压力对Al-5.0Cu-0.4Mn合金疲劳塑性应变能的影响[J].特种铸造及有色合金,2012,32(08):743-746.

Cheng Pei, Wang Xiansong, Lin Bo, et al. Influence of Pressure on the Elastic Strain Energy of Al-5.0Cu-0.4Mn Alloy in Low Cycle Fatigue[J]. Special Casting & Nonferrous Alloys, 2012,32(8):743-746.
[1]程佩,汪先送,林波,范建磊,张卫文.压力对Al-5.0Cu-0.4Mn合金疲劳塑性应变能的影响[J].特种铸造及有色合金,2012,32(08):743-746. DOI： 10.15980/j.tzzz.2012.08.025.

Cheng Pei, Wang Xiansong, Lin Bo, et al. Influence of Pressure on the Elastic Strain Energy of Al-5.0Cu-0.4Mn Alloy in Low Cycle Fatigue[J]. Special Casting & Nonferrous Alloys, 2012,32(8):743-746. DOI： 10.15980/j.tzzz.2012.08.025.

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。

Abstract

Influence of applied pressure on the elastic strain energy of Al-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 pressure

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.