Influence of shot peening on the mechanical properties of bulk amorphous Vitreloy 105
Influence of shot peening on the mechanical properties of bulk amorphous Vitreloy 105
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DOI：
10.1080/02670844.2017.1282712
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发表时间：
2017-01-01
影响因子：
2.8
通讯作者：
Kerscher, Eberhard
中科院分区：
文献类型：
--
作者：
Grell, Daniel;Gibmeier, Jens;Kerscher, Eberhard
研究了Zr52.5Cu17.9Al10Ni14.6Ti5大块非晶合金（Vitreloy 105）在两种不同喷丸表面状态下三点弯曲的准静态和循环性能。残余应力分析和纳米压痕测量揭示了喷丸后在近表面层中存在压缩残余应力和增强的硬度。通过光学显微镜和扫描电子显微镜对机械测试试样的纵向横截面的进一步调查显示，在断裂表面附近沿着剪切带传播的小裂纹。结果是根据改进的塑性喷丸状态下准静态加载条件下相比，作为铸造参考状态。所有机械测试的目的都是为了找到具有改善的机械性能的材料状态，特别关注Vitreloy 105大块金属玻璃的疲劳寿命和疲劳极限的改善。
The quasi-static and cyclic properties of bulk glassy Zr52.5Cu17.9Al10Ni14.6Ti5 alloy (Vitreloy 105) were investigated under three-point bending conditions for two different shot-peened surface states. Residual stress analysis and nanoindentation measurements revealed the presence of compressive residual stresses and an enhanced hardness in the near surface layer after shot peening. Further investigations of the longitudinal cross-sections of the mechanically tested specimens by optical and scanning electron microscopy showed small cracks propagating along shear bands in the vicinity of the fracture surface. The results are in accordance with the improved plasticity of the shot-peened states under quasi-static loading conditions compared to the as-cast reference state. All mechanical testing was carried out with the aim to find a material's state with improved mechanical properties with a special focus on the improvement of the fatigue lifetime and the endurance limit of Vitreloy 105 bulk metallic glass.