AZ31镁合金板材单双杆连续挤压变形过程及组织性能的对比

doi:10.11896/cldb.21040305

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Abstract In this work, numerical simulations of the continuous extrusion extending forming process were performed for AZ31 magnesium(Mg) alloy sheet by HyperXtrude software. The effect of feeding mode on distributions of the temperature, strain and stress of the sheet during the continuous extrusion were investigated in the single-rod and double-rod extrusion. Additionally, the microstructure and mechanical properties of the extruded Mg alloy sheets were examined under the two feeding modes as well. The results show that when the 160 mm×8 mm AZ31 Mg alloy sheet is extruded under the condition of 3 r/min (63 mm/s), the strain value of the billet in the double-rod extrusion process is less than that in the single-rod extrusion. Consequently, the temperature of the metal in the double-rod extrusion is about 10 ℃ lower than that in the single-rod feeding mode during continuous extrusion. The local stress inside the cavity during the double-rod extrusion reaches 800 MPa, which is significantly greater than that during the single-rod extrusion. The overall average grain size under the condition of double-rod feeding is 17.8 μm, which is smaller and more uniform. The average tensile strength of the product obtained by double-rod feeding reaches 209 MPa, which is higher than that of the single-rod extrusion product. The tensile strength of the middle weld zone is 218 MPa, indicating that the property of the welding zone has exceeded that of the base material.

Key words： AZ31 Mg alloy continuous extrusion numerical simulation microstructure

Received: 25 September 2022 Published: 25 September 2022 Online: 2022-09-26

CLC number:

TG376

Fund:The Natural Science Foundation of Liaoning Province (2019-MS-035).

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	Articles by authors
	ZHAO Hongfei
	GUO Lili
	ZHAO Ying
	YUAN Jingru
	YUN Xinbing

Cite this article:

ZHAO Hongfei,GUO Lili,ZHAO Ying, et al. Comparison of Deformation Process, Microstructure and Properties of AZ31 Mg Sheet Fabricated by Single and Double Rods Continuous Extrusion[J]. Materials Reports, 2022, 36(18): 21040305-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21040305 OR http://www.mater-rep.com/EN/Y2022/V36/I18/21040305

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