首页> 外文期刊>Journal of Materials Engineering and Performance >Investigation of Mode I Notch Toughness of Zr41.2Ti13.8Cu10Ni12.5Be22.5 Metallic Glass under Dynamic Loading Conditions
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Investigation of Mode I Notch Toughness of Zr41.2Ti13.8Cu10Ni12.5Be22.5 Metallic Glass under Dynamic Loading Conditions

机译:ZR41.2Ti13.8cu10ni12.8cu10ni12.5be22.5在动态负载条件下的Zr41.2.512.5的韧性研究

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摘要

Based on dynamic three-point bending tests, the dynamic notch toughness (K-Q(d)) of Zr41.2Ti13.8Cu10Ni12.5Be22.5 (Vit 1) bulk metallic glass (BMG) was found to be sensitive to stress intensity factor rate (K-Q(d)), which varied from 5.21 to 31.90 MPa m(1/2). The number of shear bands (N-s) in the notch tip plastic zone was quantitatively analyzed. The phenomenon wherein N-s decreased with increasing loading rate was explained based on the theory of the shear transformation zone and the softening mechanism. Then, power law relationships were established among N-s, K-Q(d) and K-Q(d). The results showed that shear bands can affect K-Q(d) and K-Q(d) and act as a bridge connecting K-Q(d) and K-Q(d). The sensitivity of K-Q(d) to K-Q(d) in BMGs can be well explained by the variation of N-s with loading rate.
机译:基于动态三点弯曲试验,发现ZR41.2Ti13.8Cu10Ni12.5Be22.5(Vit 1)散装金属玻璃(BMG)的动态凹口韧性(KQ(D))对应力强度因子率敏感( kq(d)),其从5.21变化到31.90 mpa m(1/2)。 数量地分析了凹口尖端塑料区中的剪切带(N-S)的数量。 基于剪切变换区和软化机理的理论,解释了N-S降低的现象。 然后,在N-S,K-Q(D)和K-Q(D)之间建立了权力法关系。 结果表明,剪切带可以影响K-Q(D)和K-Q(D),并充当连接K-Q(D)和K-Q(D)的桥。 通过加载速率的N-S的变化可以很好地解释BMG中的K-Q(D)至K-Q(D)的敏感性。

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