The high cycle fatigue property of Mg-Gd-Y-Zn-Mn alloy enhanced by LPSO phase

The high cycle fatigue property of Mg-Gd-Y-Zn-Mn alloy enhanced by LPSO phase
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LPSO相增强Mg-Gd-Y-Zn-Mn合金的高周疲劳性能

DOI:
10.1016/j.matlet.2021.130367
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发表时间:
2021-12
期刊:
影响因子:
3
通讯作者:
Liu Shijie
Liu Shijie
中科院分区:
材料科学3区
文献类型:
--
作者:
Su Chen;Wang Jingfeng;Zeng Linjie;Hu Hao;Liu Shijie

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研究了长周期堆积有序相(LPSO)强化挤压镁合金的高周疲劳性能。结果表明,在高周拉伸疲劳试验和旋转弯曲疲劳试验中,无论是在光滑表面还是在V型缺口试件中,LPSO相都能迫使疲劳裂纹的扩展方向发生改变,从而有效地阻止疲劳裂纹的扩展,因此LPSO相增强的镁合金具有较高的疲劳疲劳强度。本文研究的光滑表面的疲劳强度可超过220 Mpa,接近铝合金的疲劳强度。
In this study, the high cycle fatigue (HCF) performance of the extruded Mg-Gd-Y-Zn-Mn alloy reinforced by Long-period stacking ordered (LPSO) phase was researched. The results show that the Mg alloy enhanced by LPSO phase can have higher HCF strength, because the LPSO phase can effectively hindering the fatigue crack growth by force them to change the growth direction both in the high cycle tensile fatigue tests and rotating bending fatigue tests whether in smooth surfaces and V-notched samples. The fatigue strength of the smooth surface in this study can exceed 220 Mpa, which is close to the fatigue strength of Al alloy.
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