Effects of Changes in Chemistry on Flex Bending Fatigue Behavior of Al-Based Amorphous Alloy Ribbons
Effects of Changes in Chemistry on Flex Bending Fatigue Behavior of Al-Based Amorphous Alloy Ribbons
复制标题
化学变化对铝基非晶合金带弯曲疲劳行为的影响
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Lewandowski
中科院分区：
文献类型：
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作者：
Chun;J. Lewandowski
在室温1hz下，测定了成分变化对Al-Gd-Ni-X （X = Fe或Co）非晶态合金带的流动行为和弯曲疲劳行为的影响。结果表明，在这些材料中加入Fe、Co和Fe/Co组合，除了提高结晶活化能外，还提高了材料的强度、Tg和Tx1。最低强度（880 MPa）的基体合金Al87Gd6Ni7表现出最佳的低周疲劳（LCF）和最差的高周疲劳（HCF）行为，而较高强度（~1100 MPa）的Al85Gd6Ni7Fe2和Al85Gd6Ni7Fe1Co1表现出较差的LCF和较好的HCF行为。1 × 106次循环疲劳极限应力幅值与单轴破坏强度之比为0.25 ~ 0.37 (240 ~ 397 MPa)，远高于常规铝合金。这些结果也与其它非晶合金带的结果进行了比较。
The effects of changes in composition on the flow behavior and flex bending fatigue behavior of a series of Al-Gd-Ni-X (X = Fe or Co) amorphous alloy ribbons have been determined at 1 Hz at room temperature. It has been shown that the addition of Fe, Co, and Fe/Co combination into these materials increases the strength, Tg, and Tx1 in addition to the activation energy for crystallization. The lowest strength (i.e., 880 MPa) base alloy Al87Gd6Ni7 exhibited the best low-cycle fatigue (LCF) and worst high-cycle fatigue (HCF) behavior, whereas the higher strength alloys (~1100 MPa) Al85Gd6Ni7Fe2 and Al85Gd6Ni7Fe1Co1 exhibited worse LCF and better HCF behavior. The ratio of the stress amplitude at the fatigue limit at 1 × 106 cycles to uniaxial failure strength ranged from 0.25 to 0.37 (240 to 397 MPa), much higher than conventional aluminum alloys. These results are also compared with those obtained on other amorphous alloy ribbons.