当前位置: X-MOL 学术Int. J. Miner. Metall. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A comparative study between friction stir processing and friction stir vibration processing to develop magnesium surface nanocomposites
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-020-1993-4
Behrouz Bagheri , Mahmoud Abbasi , Amin Abdollahzadeh , Amir Hossein Kokabi

Friction stir processing (FSP) can be used to improve surface composites. In this study, a modified method of FSP called friction stir vibration processing (FSVP) was applied to develop a surface composite on AZ91 magnesium alloy. In this technique, the workpiece is vibrated normal to the processing direction. The results illustrated that compared with the FSP method, the FSVP caused a better homogeneous distribution of SiC particles in the microstructure. The results also showed that matrix grains of friction stir vibration processed (FSV-processed) samples ((26.43 ± 2.00) µm) were finer than those of friction stir processed (FS-processed) specimens ((39.43 ± 2.00) µm). The results indicated that the ultimate tensile strength (UTS) of FSV-processed specimens (361.82 MPa) was higher than that of FS-processed specimens (324.97 MPa). The higher plastic strain in the material during FSVP, due to workpiece vibration, resulted in higher dynamic recrystallization, and consequently, finer grains were developed. The elongation and formability index of the FSV-processed specimen (16.88% and 6107.52 MPa%, respectively) were higher than those of the FS-processed sample (15.24% and 4952.54 MPa%, respectively). Moreover, the effects of FSVP were also found to intensify as the vibration frequency increased.



中文翻译:

搅拌摩擦与搅拌振动振动制备镁表面纳米复合材料的比较研究。

搅拌摩擦加工(FSP)可用于改善表面复合材料。在这项研究中,一种称为摩擦搅拌振动处理(FSVP)的FSP改进方法被用于在AZ91镁合金上开发表面复合材料。在这种技术中,工件垂直于加工方向振动。结果表明,与FSP方法相比,FSVP可以使SiC颗粒在组织中更好地均匀分布。结果还显示,经摩擦搅拌处理(FSV处理)的样品((26.43±2.00)μm)的基体晶粒比经摩擦搅拌处理(FS处理)样品((39.43±2.00)μm)的基体晶粒细。结果表明,FSV处理的试样(361.82 MPa)的极限抗拉强度(UTS)高于FSF处理的试样(324.97 MPa)的极限抗拉强度。由于工件振动,FSVP期间材料中较高的塑性应变会导致较高的动态重结晶,因此会产生更细的晶粒。经FSV处理的样品(分别为16.88%和6107.52 MPa%)的伸长率和可成形性指数高于经FSV处理的样品(分别为15.24%和4952.54 MPa%)。此外,还发现随着振动频率的增加,FSVP的作用也会增强。

更新日期:2020-08-15
down
wechat
bug