刀具肩销直径比(D/ D)对搅拌摩擦加工Mg-Micro Al₂O₃复合材料力学性能的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-12-28 DOI:10.15282/ijame.19.4.2022.07.0781

M. R. A. Mohd Reduan, Z. Zulkfli, Z. Hamedon, N. Fatchurrohman

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引用次数: 0

摘要

工程行业使用镁，因为它是一种低密度轻量化的材料，能够取代较重的材料。搅拌摩擦加工是一种适用于改变工件结构性能的方法。H13钢刀具被加工成不同肩径与销径(D/ D)比的几种刀具参数。主轴转速为1040 rpm，横移速度为17 mm/min。工具和工件之间的接触产生摩擦热，使材料软化。通过将镁合金制备成金属基复合材料(MMC)，在FSP过程中对微尺寸氧化铝粉末(Al2O3)进行强化，提高AZ91A镁合金的力学性能。本研究的目的是分析并获得加工Mg-Micro - Al2O3的最佳刀具参数。用光镜观察了FSPed Mg-Micro Al2O3的微观组织，特别是晶粒尺寸。硬度测试是利用洛氏硬度计来验证硬度的变化。结果表明，12mm的肩径是Mg-Micro Al2O3最适合的加工参数，因为它产生的缺陷较少，晶粒尺寸更细。

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Effect of Tool Shoulder-to-Pin Diameter Ratio (D/d) on the Mechanical Properties of Friction Stir Processed Mg-Micro Al₂O₃ Composite

The engineering industry uses magnesium as it is a low density to lightweight ratio material and able to replace the heavier material. Friction stir processing is an applicable method to modify the structural properties of the workpiece. H13 steel tools are produced into several tool parameters with different shoulder diameters to pin diameters (D/d) ratios. A fixed machining parameter of 1040 rpm for spindle speed and 17 mm/min for traverse speed was used throughout this study. Contact between the tool and workpiece produces frictional heat that softens the material. By creating magnesium alloys into metal matrix composites (MMC), microsized aluminum oxide powder (Al2O3) was reinforced during FSP to enhance the mechanical properties of the magnesium alloy AZ91A. The aim of this study is to analyze and obtain the optimal tool parameter to process Mg-Micro Al2O3. The microstructure of FSPed Mg-Micro Al2O3 was observed using a light microscope, specifically on the grain size. The hardness test was done utilizing the Rockwell Hardness Tester to validate the changes in the hardness. The shoulder diameter of 12 mm was found to be the most suitable parameter for processing Mg-Micro Al2O3 as it produced fewer defects and finer grain size.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.