A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool

Zhang, Changqing; Wang, Weijie; Jin, Xin; Rong, Chen; Qin, Zhuo

doi:10.3390/met9050507

Open AccessArticle

A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool

by

Changqing Zhang

^1,2,*,

Weijie Wang

²,

Xin Jin

²,

Chen Rong

² and

Zhuo Qin

²

¹

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou 730050, China

²

School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

^*

Author to whom correspondence should be addressed.

Metals 2019, 9(5), 507; https://doi.org/10.3390/met9050507

Submission received: 8 April 2019 / Revised: 27 April 2019 / Accepted: 28 April 2019 / Published: 30 April 2019

(This article belongs to the Special Issue Advanced Process Technologies Based on Friction Stir Welding and Linear Friction Welding)

Download

Browse Figures

Versions Notes

Abstract

The welding tool is the key of micro friction stir welding (μFSW), which affects the heat input and the plastic forming of weld metal. In this paper, 0.8-mm-thick ultra-thin 1060-H24 aluminum sheets μFSW butt joints were used to compare and analyze the influence of the conventional tool and shoulderless tool on weld shaping, microstructure and mechanical properties. Besides, by measuring the axial force, transverse force and weld temperature in μFSW process, the influence of these two different tools on the heat input and metal flow mechanism of the weld were analyzed. The results show that the weld generated by the shoulderless tool has narrower width, less heat input and metal involved in plastic forming resulting in smaller HAZ (heat affected zone). The hardness of NZ (nugget zone) is obviously increased compared with that of the base metal. The highest tensile strength can reach 108.6 MPa, accounting for 78.6% of the base metal and 117.3% of the joint by the conventional tool. But the welding defects have to be overcome for industrial application of the shoulderless tool.

Keywords: ultra-thin aluminum sheet; micro friction stir welding; shoulderless tool; microstructure; mechanical properties

Share and Cite

MDPI and ACS Style

Zhang, C.; Wang, W.; Jin, X.; Rong, C.; Qin, Z. A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool. Metals 2019, 9, 507. https://doi.org/10.3390/met9050507

AMA Style

Zhang C, Wang W, Jin X, Rong C, Qin Z. A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool. Metals. 2019; 9(5):507. https://doi.org/10.3390/met9050507

Chicago/Turabian Style

Zhang, Changqing, Weijie Wang, Xin Jin, Chen Rong, and Zhuo Qin. 2019. "A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool" Metals 9, no. 5: 507. https://doi.org/10.3390/met9050507

APA Style

Zhang, C., Wang, W., Jin, X., Rong, C., & Qin, Z. (2019). A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool. Metals, 9(5), 507. https://doi.org/10.3390/met9050507

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

A Study on Microstructure and Mechanical Properties of Micro Friction Stir Welded Ultra-Thin Al-1060 Sheets by the Shoulderless Tool

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI