Effect of Cu content on quenching sensitivity of Al-Cu-Li alloy

被引：1

作者：

Liu J. ^{[1
]}

Li H. ^{[1
,2
]}

Yang H. ^{[1
]}

Lin H. ^{[3
]}

Zheng Z. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Central South University, Changsha

[2] State Key Laboratory of Lightweight High-Strength Structural Materials, Central South University, Changsha

[3] Southwest Aluminum (Group) Co., Ltd., Chongqing

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2024年 / 34卷 / 05期

关键词：

Al-Cu-Li alloy; Cu content; quenching sensitivity; quenching-induced phase; strength;

D O I：

10.11817/j.ysxb.1004.0609.2023-44600

中图分类号：

学科分类号：

摘要：

The effects of Cu content (3.15%, 3.63% and 3.88%) on the quenching sensitivity of Al-Cu-Li alloy were studied by means of strength test, continuous cooling transformation and time-temperature-transformation curves calculation and microstructure characterization methods such as X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Combined with theoretical analysis, the mechanism of Cu content affecting quenching sensitivity was analyzed from the perspective of precipitation driving force and nucleation site. The results show that, with the increase of Cu content, the lattice distortion energy increases, the solubility of Li decreases, the dislocations and residual second phases in the quenched alloy increase, the driving force of precipitation and sites of heterogeneous nucleation of Li-containing phase increase, and the quenching-induced phase increases. When the critical cooling rate increases, the incubation period of nose tip temperature is shortened, the strength residual rate decreases, and the quenching sensitivity of Al-Cu-Li alloy increases. The strength of T8 alloy is affected by Cu content and quenching rate. It is mainly affected by Cu content when the quenching rate is high, and the influence of Cu content decreases when the quenching rate is low. © 2024 Central South University of Technology. All rights reserved.

引用

页码：1506 / 1518

页数：12

共 27 条

[1]

LI J F, NING H, LIU D Y, Et al., Alloying and micro-alloying in Al-Cu-Li series alloys, The Chinese Journal of Nonferrous Metals, 31, 2, (2021)

[2]

ZHAO X Y, LIU W S, XIAO D H, Et al., A critical review: Crystal structure, evolution and interaction mechanism with dislocations of nano precipitates in Al-Li alloys, Materials & Design, 217, (2022)

[3]

GUO Y J, ZHANG L, WU G H, Et al., Research progress on effect of nano-precipitates on mechanical property anisotropy of Al-Li alloys, The Chinese Journal of Nonferrous Metals, 33, 8, pp. 2371-2384, (2023)

[4]

WANG Y X, WU G H, ZHANG L, Et al., A comparative study on precipitation behavior of a sand-cast Al-Li-Cu alloy with the different quenching rates[J], Journal of Materials Research and Technology, 21, pp. 4893-4907, (2022)

[5]

LU D D, NING H, DU Y, Et al., Detailed investigation of quench sensitivity of 2050 Al-Cu-Li alloy by interrupted quenching method and novel end quenching method, Journal of Alloys and Compounds, 888, (2021)

[6]

LIU D Y, MA Y L, LI J F, Et al., Quench sensitivity and microstructure evolution of the 2060 Al-Cu-Li alloy with a low Mg content, Materials Characterization, 177, (2021)

[7]

DENG Y L, WAN L, ZHANG Y Y, Et al., Influence of Mg content on quench sensitivity of Al-Zn-Mg-Cu aluminum alloys, Journal of Alloys and Compounds, 509, 13, (2011)

[8]

CAO L T, ZHANG M H, MA Z M, Et al., Effect of Zn content on quenching sensitivity relative to mechanical properties of Al-xZn-1.5Mg-1.0Cu alloy, The Chinese Journal of Nonferrous Metals, 33, 5, (2023)

[9]

ZHANG M H, LIU S D, JIANG J Y, Et al., Effect of Cu content on quenching sensitivity relative to mechanical properties of ultra-high strength aluminum alloy, The Chinese Journal of Nonferrous Metals, 33, 3, (2023)

[10]

BRYANT A J., The effect of composition upon the quench-sensitivity of some Al-Zn-Mg alloys, Inst Metals J, 94, 3, (1966)

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