单级时效处理对2A97铝锂合金组织、力学性能和腐蚀性能的影响

doi:10.19976/j.cnki.43-1448/TF.2022030

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Abstract In order to determine the effects of single-stage aging regime on the microstructures, mechanical properties and corrosion properties of 2A97 Al-Li alloys, the methods of room temperature tensile, intergranular corrosion, exfoliation corrosion, electrochemical corrosion and TEM observation were used to investigate the microstructure, mechanical properties and corrosion properties of 2A97 Al-Li alloys after different single-stage aging treatments. The alloys were tested and characterized. The results show that with increasing the aging temperature, the aging time for 2A97 Al-Li alloys to obtain the best mechanical properties decreases. With increasing the aging temperature and aging time, the corrosion resistance of the alloys decreases. After aging at 165 ℃ for 60 h, the tensile strength, yield strength and elongation of the alloys are 549 MPa, 484 MPa, and 8.8%, respectively, the intergranular corrosion is grade 4, and the exfoliation corrosion grade is EC.

Key words： 2A97 Al-Li alloys single-stage aging microstructure mechanical property corrosion property

Received: 22 March 2022 Published: 14 September 2022

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TG146.21

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	Articles by authors
	YOU Renxuan
	MA Yunzhu
	TANG Ya
	ZHAO Xinyue
	LIU Wensheng

Cite this article:

YOU Renxuan,MA Yunzhu,TANG Ya, et al. Effects of single-stage aging treatment on microstructure, mechanical properties and corrosion properties of 2A97 Al-Li alloys[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(4): 398-408.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022030 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I4/398

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