Fatigue Behavior of Semi-solid Rheo-die Casting Aluminum Alloy Parts

Yang Yimin; Zhao Junwen; Wu Guoqiang; Wang Haibo

doi:10.15980/j.tzzz.2021.01.017

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Fatigue Behavior of Semi-solid Rheo-die Casting Aluminum Alloy Parts
Vol. 41, Issue 1, Pages: 83-87(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.01.017

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[1]杨依珉,赵君文,巫国强,王海波.半固态流变压铸铝合金件疲劳性能研究[J].特种铸造及有色合金,2021,41(01):83-87.

Yang Yimin, Zhao Junwen, Wu Guoqiang, et al. Fatigue Behavior of Semi-solid Rheo-die Casting Aluminum Alloy Parts. [J]. Special Casting & Nonferrous Alloys 41(1):83-87(2021)
[1]杨依珉,赵君文,巫国强,王海波.半固态流变压铸铝合金件疲劳性能研究[J].特种铸造及有色合金,2021,41(01):83-87. DOI： 10.15980/j.tzzz.2021.01.017.

Yang Yimin, Zhao Junwen, Wu Guoqiang, et al. Fatigue Behavior of Semi-solid Rheo-die Casting Aluminum Alloy Parts. [J]. Special Casting & Nonferrous Alloys 41(1):83-87(2021) DOI： 10.15980/j.tzzz.2021.01.017.

摘要

对比研究了液态压铸和半固态流变压铸对ZL114A铝合金铸件疲劳性能的影响。结果表明

半固态流变压铸件相较于传统液态压铸件疲劳性能更好而且更稳定。液态压铸件的疲劳寿命主要受孔洞尺寸影响

孔洞尺寸越大

疲劳寿命越低。半固态压铸件的疲劳寿命主要受密度（孔隙率）影响

与密度成正比。半固态压铸ZL114A铝合金试样在密度大于2.62g/cm3时

疲劳性能表现良好。在70MPa应力下

疲劳寿命可达107次。液态压铸件裂纹萌生于大的气缩孔

半固态压铸件的裂纹萌生是于中心缩松多孔的综合作用结果。

Abstract

The effects of liquid die casting and semi-solid rheo-die casting on the fatigue behavior of ZL114 Aaluminum alloy parts were investigated.The results indicate that semi-solid rheo-die castings have better and more stable fatigue performance than traditional liquid die castings.The fatigue life of liquid die-casting parts is mainly affected by the size of holes.With increasing in the hole size

the fatigue life of the castings is decreased.The fatigue life of semi-solid die-casting parts is mainly affected by the density and proportional to the density.The semi-solid die-casting ZL114 Aaluminum alloy samples have a satisfied fatigue performance when the density is more than 2.62 g/cm3.At 70 MPa

the fatigue life can reach 107 cycles.Cracks of liquid die-casting parts are mainly initiated from gas holes while those of semi-solid die-casting parts tend to be initiated from multiple shrinkages porosity.