预变形对Al-Cu-Li-Mn-Zr合金的第二相析出及力学性能的影响

doi:10.11896/j.issn.1005-023X.2018.04.012

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Abstract The effect of pre-deformation on the precipitation behavior and mechanical property of Al-Cu-Li-Mn-Zr alloy were investigated by Vickers hardness measurement, room-temperature tensile test and transmission electron microscopy (TEM) characterization. The results showed that in the peak aged Al-Cu-Li-Mn-Zr alloy without pre-deformation, the T₁ and θ' phases were usually dominant, while the amount of χ phase was very limited. When this alloy was subjected to the pre-deformation prior to aging, the formation of T₁ was promoted, and the nucleation of θ' was inhibited, while there was little influence on the formation of χ phase. Therefore, the T₁ phase was primary precipitate in the aged alloy with pre-strain. With the increase of pre-strain, although the diameter of the T₁ precipitates became smaller, the thickness and volume fraction of them kept almost the same. In addition, when larger pre-strain was applied, the alloy showed higher strength and lower plasticity.

Key words： Al-Cu-Li-Mn-Zr alloy pre-deformation T₁ precipitate precipitation strengthening

Published: 25 February 2018

CLC number:

TG166.3

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	Articles by authors
	DENG Yanjun
	HUANG Guangjie
	CAO Lingfei
	WU Xiaodong
	HUANG Li

Cite this article:

DENG Yanjun,HUANG Guangjie,CAO Lingfei, et al. Effect of Pre-deformation on the Precipitation Behavior and Mechanical Property of Al-Cu-Li-Mn-Zr Alloy[J]. Materials Reports, 2018, 32(4): 569-573.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.04.012 OR http://www.mater-rep.com/EN/Y2018/V32/I4/569

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