Stretch Formability of an AZ61 Alloy Plate Prepared by Multi-Pass Friction Stir Processing

Xicai Luo; Haolin Liu; Limei Kang; Jielin Lin; Yifei Liu; Datong Zhang; Dongyang Li; Daolun Chen

doi:10.3390/ma14123168

Stretch Formability of an AZ61 Alloy Plate Prepared by Multi-Pass Friction Stir Processing

Materials (Basel). 2021 Jun 9;14(12):3168. doi: 10.3390/ma14123168.

Authors

Xicai Luo¹, Haolin Liu¹, Limei Kang¹, Jielin Lin¹, Yifei Liu¹, Datong Zhang², Dongyang Li³, Daolun Chen⁴

Affiliations

¹ School of Electrical and Mechanical Engineering, Guangzhou Railway Polytechnic, Guangzhou 510430, China.
² National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
³ Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2H5, Canada.
⁴ Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.

Abstract

The stretch formability behavior of an AZ61 magnesium alloy plate produced by multi-pass friction stir processing (M-FSP) was investigated, with the applied load vs. displacement curves recorded during Erichsen cupping tests at different punching speeds at room temperature. The stretch formability of M-FSP AZ61 magnesium alloy was significantly enhanced, compared with that of its cast counterpart. The highest Erichsen index of 3.7 mm was obtained at a punching speed of 0.1 mm/min. The improved stretch formability was mainly attributed to the grain refinement stemming from the M-FSP and the presence of extension twinning to accommodate deformation during Erichsen cupping testing.

Keywords: Erichsen cupping test; microstructure evolution; multiple-pass friction stir processing; stretch formability.

Abstract

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