Understanding the correlation of plastic zone size with characteristic dimple pattern length scale on the fracture surface of a bulk metallic glass

Understanding the correlation of plastic zone size with characteristic dimple pattern length scale on the fracture surface of a bulk metallic glass
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了解塑性区尺寸与大块金属玻璃断裂表面特征凹坑图案长度尺度的相关性

DOI:
10.1016/j.msea.2011.11.008
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发表时间:
2012-01
影响因子:
6.4
通讯作者:
Xi, X. K.
Xi, X. K.
中科院分区:
材料科学1区
文献类型:
--
作者:
Yuan, C. C.;Ma, J.;Xi, X. K.

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对铸态和退火状态下的zr61cu17 .3 ni12 .8 al7.9 . sn1玻璃进行了疲劳预裂韧性测试。塑性区尺寸对玻璃的内部状态非常敏感,并与断口表面的特征韧窝图案长度相关。讨论了塑性功耗散对裂纹尖端附近两个特征长度尺度的影响,并对多余自由体积和泊松比进行了分析。
Fatigue pre-crack toughness measurements following standard procedures for a model Zr61Cu17.3Ni12.8Al7.9Sn1glass in as-cast and annealed states were performed. Plastic zone size was found to be very sensitive to the internal states of this glass and be correlated with the characteristic dimple pattern length on fracture surfaces. Effect of plastic work energy dissipation on two characteristic length scales in the vicinity of a crack tip was discussed, in addition to the analyses of excess free volumes and Poisson's ratio.
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