AA1050铝合金搅拌摩擦加工与焊接工艺参数优化

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-06-10 DOI:10.22068/IJMSE.2016

Mahdi Alishavandi, M. Ebadi, A. Kokabi

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引用次数: 4

摘要

对AA1050铝合金(AA)进行了搅拌摩擦加工(FSP)，在28种旋转和横移速度(800-2000 rpm和50-200 mm.min-1)和4种不同的刀具探头形状(螺纹、柱状、方形和三角形)组合中发现了最高的力学性能。为了达到这个目的，AA标准片通过了一次FSP。选择1600 rpm和100 mm.min-1带螺纹工具探头作为旋转和导线速度的最佳组合。利用光学显微镜(OM)研究了搅拌区(SZ)的晶粒尺寸。结果表明:在FSP过程中，由于动态再结晶，SZ的晶粒尺寸由30 μm细化到12 μm左右;与退火后的AA试样相比，处理后的试样硬度、屈服应力、极限抗拉强度和伸长率分别提高了65%、80%、66%和14%。通过OM和场发射扫描电镜(FESEM)研究断口特征，发现其断裂行为以韧性为主。

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Optimization of Parameters for the Friction Stir Processing and Welding of AA1050 Aluminum Alloy

Friction-Stir Processing (FSP) was applied on AA1050 Aluminum Alloy (AA) to find the highest mechanical properties among 28 combinations of the rotational and traverse speed (800-2000 rpm and 50-200 mm.min-1) and four different tool probe shapes (threaded, columnar, square and triangle). To this aim, the AA standard sheet went through a single pass of FSP. The 1600 rpm and 100 mm.min-1 with threaded tool probe was chosen as the best combination of rotational and traverse speed. Grain size at the Stirred Zone (SZ) was studied using Optical Microscopy (OM). The results showed that the SZ’s grain size was refined from 30 μm down to about 12 μm due to dynamic recrystallization during FSP. The processed sample exhibited improved hardness, yield stress, ultimate tensile strength, elongation up to 65, 80, 66, and 14%, respectively, compared to the annealed AA sample. Studying fractographic features by OM and field emission scanning electron microscope (FESEM) revealed a dominantly ductile fracture behavior.

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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.