Effect of Friction Stir Processing on Hardness and Microstructure in La-Based Bulk Metallic Glass Composites
Effect of Friction Stir Processing on Hardness and Microstructure in La-Based Bulk Metallic Glass Composites
复制标题
搅拌摩擦加工对镧基大块金属玻璃复合材料硬度和微观结构的影响
DOI：
10.2320/matertrans.m2019004
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发表时间：
2019
影响因子：
1.2
通讯作者：
Yuan Zizhou
中科院分区：
文献类型：
--
作者：
Zhang Xiangyun;Jiao Dong;Li Shixia;Li Chunyan;Yuan Zizhou
对2.5mm厚的La 66 Al 14 Cu 20块体非晶复合材料（BMGCs）进行了搅拌摩擦加工。研究了FSP对BMGCs的影响。显微组织观察表明，FSP后的结晶颗粒被拉长，并平行于旋转方向的针。显微硬度测试表明，搅拌区硬度较铸态下降约50 Hv。采用纳米压痕法研究了FSP前后非晶基体的力学性能。结果表明，用聚合物材料常用的广义Kelvin模型可以较准确地拟合FSP前后BMGCs的蠕变位移-时间曲线。蠕变柔量和蠕变延迟谱表明铸态试样处于较松弛状态。[doi：10.2320/matertrans.M2019004]
Friction stir processing (FSP) was conducted on a 2.5mm thick La66Al14Cu20 bulk metallic glass composites (BMGCs) plate. Effects of FSP on the BMGCs have been investigated. Microstructural observations indicated that the crystalline particles were elongated and parallel to the rotating direction of the pin after FSP. Micro-hardness measurement showed that hardness of the stirred zone drops down approximately 50Hv compared with the as-cast sample. The mechanical properties of the amorphous matrix before and after FSP have been investigated using nanoindentation test. Results shown that creep displacement-time curves of the BMGCs before and after FSP can be accurately fitted by the generalized Kelvin model which was usually used in polymeric materials. The creep compliance and creep retardation spectrum shown that the as-cast specimen is in a more relaxed state. [doi:10.2320/matertrans.M2019004]