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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of microstructural feature on the tensile properties and vibration fracture resistance of friction stirred 5083 Alloy
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Effect of microstructural feature on the tensile properties and vibration fracture resistance of friction stirred 5083 Alloy

机译：显微组织特征对搅拌摩擦5083合金拉伸性能和抗振动断裂性能的影响

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摘要

In this study, 5083 Al-Mg plates were friction stirred at optimal rotation speeds to investigate the tensile properties and vibration fracture resistance. As a result, grain refinement could be observed at the stir zone with 7 μm average grain size and fine particles could be observed as well. The tensile strain-elongation curves reveal that the tensile strength and elongation tended to increase as the microstructure was refined in the friction stirred sample. The D-N curves of the specimens recorded under an identical initial deflection show that there was a slight difference between the parent metal and the friction stirred sample. A refined grain size is partially responsible for an improvement in vibration fracture resistance; however there is another factor which plays a role too. It should be noted that the deterioration of vibration fracture resistance is a consequence of fine particles stirred into a softened matrix. From the crack propagation results, an intergranular crack propagation feature can be recognized in the friction stirred specimen, and it is reasonable to suggest that the fine particles played an important role in the deterioration of the vibration fracture resistance.
机译：在这项研究中，以最佳转速摩擦搅拌了5083个Al-Mg板，以研究其拉伸性能和抗振动断裂性能。结果，可以在平均粒径为7μm的搅拌区域观察到晶粒细化，并且还可以观察到细颗粒。拉伸应变-伸长曲线表明，随着摩擦搅拌样品中的微观结构的细化，拉伸强度和伸长率趋于增加。在相同的初始挠度下记录的样品的D-N曲线表明，母体金属和搅拌摩擦的样品之间存在细微差异。细化的晶粒尺寸部分地导致抗振动断裂性的提高。但是还有另一个因素也起作用。应该注意的是，抗振动断裂性的下降是由于细颗粒被搅拌成软化的基体的结果。从裂纹扩展结果可以看出，在搅拌摩擦试样中存在晶间裂纹扩展特征，可以合理地认为细颗粒在抗振断裂性能的降低中起着重要的作用。

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