控制挤压比制备的AZ91异构镁合金的组织与力学性能

doi:10.11896/cldb.21050132

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Abstract AZ91 bars with heterogeneous or uniform structure were prepared by controlling the extrusion ratio, using commercial hot-rolled AZ91 as experimental materials. The microstructure and tensile properties of the bars were studied by optical microscope (OM), scanning electron microscope (SEM), electron backscattering diffraction (EBSD) and universal testing machine. The results show that the strength and ductility of the extruded alloy (AE7, AE11, AE17 and AE26) are significantly improved, compared with the original rolled (R) and rolled annealed (RA) alloy. In addition, AE7 presents a uniform fine-grain structure with the highest strength but the worst ductility, while AE26 obtains a uniform coarse-grain structure with the highest ductility but the lowest strength. Differently, AE11 and AE17 show heterogeneous structure with a mixture of coarse and fine grains, and AE11 has the best combination of strength and ductility, which is not only attributed to the fine grain strengthening and hard orientation of grains. Also, the heterogeneous deformation induced (HDI) strengthening plays an important role in the deformation process.

Key words： magnesium alloy microstructure heterostructure heterogeneous deformation induced (HDI) strengthening mechanical property

Published: Online: 2022-10-26

CLC number:

TG379

Fund:National Natural Science Foundation of China (52071035,U1764253).

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	Articles by authors
	LIU Ke
	ZHANG Baoxuan
	HUANG Guangsheng
	JIANG Bin
	TANG Aitao
	PAN Fusheng

Cite this article:

LIU Ke,ZHANG Baoxuan,HUANG Guangsheng, et al. Microstructure and Mechanical Properties of Heterogeneous AZ91 Magnesium Alloy Prepared by Controlling Extrusion Ratio[J]. Materials Reports, 2022, 36(20): 21050132-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21050132 OR http://www.mater-rep.com/EN/Y2022/V36/I20/21050132

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