高Cu含量Al-Cu-Li-Sc合金中W(Al8Cu4Sc)相的形成机制

doi:10.13251/j.issn.0254-6051.2020.02.012

金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 61-65.DOI: 10.13251/j.issn.0254-6051.2020.02.012

高Cu含量Al-Cu-Li-Sc合金中W(Al₈Cu₄Sc)相的形成机制

孔德斌, 李彩琼

烟台南山学院工学院, 山东烟台 265713

收稿日期:2019-08-25 出版日期:2020-02-25 发布日期:2020-04-03
通讯作者: 李彩琼,讲师,硕士,联系电话:13963830191,E-mail:licaiqiong666@163.com
作者简介:孔德斌(1981—),男,副教授,硕士,主要从事材料设计与热力学相图计算研究,发表论文5篇,联系电话:18562258561,E-mail:kongdebin1981@qq.com。
基金资助:
山东省高等学校科技计划项目(J18KA053)

Formation mechanism of W(Al₈Cu₄Sc) phase in Al-Cu-Li-Sc alloy with high Cu content

Kong Debin, Li Caiqiong

College of Engineering, Yantai Nanshan University, Yantai Shandong 265713, China

Received:2019-08-25 Online:2020-02-25 Published:2020-04-03

摘要/Abstract

摘要：

采用光学显微镜(OM)、扫描电镜(SEM)、电子探针显微分析(EPMA)、X射线衍射(XRD)以及扫描透射电镜(STEM),研究了一种高Cu含量Al-2.35Cu-4.6Li-0.12Sc(at%)合金在均匀化热处理过程中微观组织演变以及W(Al₈Cu₄Sc)相的形成机制。结果表明:铸态时,合金中的主要凝固相为T_B(Al₇Cu₄Li)相,Sc主要以过饱和固溶体的形式存在于基体中;均匀化后,T_B相完全溶解,基体中的Cu含量增加,Sc含量减少,稳定的W相形成。分析表明,由于T_B相与基体界面是非共格的,W相优先在此界面形核将有利于其形核能的降低。W相形核后通过不断消耗其附着的T_B相上的Cu原子和Al基体中的过饱和Sc原子而逐渐长大,直至形成尺寸1 μm左右的稳定粒子。

关键词: Al-Cu-Li合金, Sc, W相, 微观组织

Abstract:

The microstructural evolution of an Al-2.35Cu-4.6Li-0.12Sc(at%) alloy with high Cu content and the formation mechanism of W(Al₈Cu₄Sc) phase during homogenization were studied by means of OM、SEM、EPMA、XRD and STEM. The results show that the main solidification phase is T_B (Al₇Cu₄Li) phase in as-cast, and Sc mainly exists in the form of supersaturated solid solution. After homogenization, the T_B phase dissolves completely, the content of Cu in the matrix increases and that of Sc decreases, the stable W phase forms at the same time. The analysis shows that the interface of T_B phase and Al matrix must be a preferred nucleation site for the W phase because of the incoherent interface of T_B phase and Al matrix. So the W phase nucleates preferentially here, and then transforms into the stable phases with a size of 1 μm by consuming the Sc atoms fixed in the supersaturate solid solution and Cu atoms in T_B phase.

Key words: Al-Cu-Li alloy, Sc, W phase, microstructure

中图分类号:

TG146.2

孔德斌, 李彩琼. 高Cu含量Al-Cu-Li-Sc合金中W(Al₈Cu₄Sc)相的形成机制[J]. 金属热处理, 2020, 45(2): 61-65.

Kong Debin, Li Caiqiong. Formation mechanism of W(Al₈Cu₄Sc) phase in Al-Cu-Li-Sc alloy with high Cu content[J]. HTM, 2020, 45(2): 61-65.

参考文献

[1]郑子樵, 李劲风, 李红英, 等. 新型铝锂合金的研究进展与应用[C]//中国有色金属学会材料科学与合金加工学术年会. 2011.
[2]马思图, 车欣, 王莹, 等. 固溶+时效态Al-8Zn-2.5Mg-1.5Cu(-0.15Y)合金的室温和低温拉伸性能[J]. 金属热处理, 2019, 44(2): 167-171.
Ma Situ, Chen Xin, Wang Ying, et al. Tensile properties at room and low temperatures of solid-solution treated and aged Al-8Zn-2.5Mg-1.5Cu(-0.15Y) alloys[J]. Heat Treatment of Metals, 2019, 44(2): 167-171.
[3]卢少康, 尹登峰, 潘康观, 等. Al-Cu-Li-Mg-Ag-Ce-Zr合金的强化机制[J]. 金属热处理, 2017, 42(5): 9-14.
Lu Shaokang, Yin Dengfeng, Pan Kangguan, et al. Strengthening mechanism of Al-Cu-Li-Mg-Ag-Ce-Zr alloy[J]. Heat Treatment of Metals, 2017, 42(5): 9-14.
[4]陈志国, 周娴, 舒军, 等. 稀土在铝合金中微合金化研究进展[J]. 矿冶工程, 2010, 30(2): 102-106.
Chen Zhiguo, Zhou Xian, Shu Jun, et al. Progress in research on microalloying of rare earth in aluminum alloy[J]. Mining and Metallurgical Engineering, 2010, 30(2): 102-106.
[5]Starink M J, Gao N, Kamp N, et al. Relations between microstructure, precipitation, age-formability and damage tolerance of Al-Cu-Mg-Li (Mn, Zr, Sc) alloys for age forming[J]. Materials Science and Engineering A, 2006, 418(1/2): 241-249.
[6]Zakharov V V. Special features of crystallization of scandium-alloyed aluminum alloys[J]. Metal Science and Heat Treatment, 2012, 53(9/10): 414-419.
[7]Deng Y, Xu G, Yin Z, et al. Effects of Sc and Zr microalloying additions on the recrystallization texture and mechanism of Al-Zn-Mg alloys[J]. Journal of Alloys and Compounds, 2013, 580: 412-426.
[8]Deng Y, Peng B, Xu G, et al. Effects of Sc and Zr on mechanical property and microstructure of tungsten inert gas and friction stir welded aerospace high strength Al-Zn-Mg alloys[J]. Materials Science and Engineering A, 2015, 639: 500-513.
[9]Rodgers B I, Prangnell P B. Corrigendum to quantification of the influence of increased pre-stretching on microstructure-strength relationships in the Al-Cu-Li alloy AA2195[J]. Acta Materialia, 2016, 108: 55-67.
[10]Kharakterova M L, Eskin D G, Toropova L S. Precipitation hardening in ternary alloys of the Al-Sc-Cu and Al-Sc-Si systems[J]. Acta Metallurgica et Materialia, 1994, 42(7): 2285-2290.
[11]Jia M, Zheng Z, Gong Z. Microstructure evolution of the 1469 Al-Cu-Li-Sc alloy during homogenization[J]. Journal of Alloys and Compounds, 2014, 614: 131-139.
[12]Han J, Zhu Z, Li H, et al. Microstructural evolution, mechanical property and thermal stability of Al-Li 2198-T8 alloy processed by high pressure torsion[J]. Materials Science and Engineering A, 2016, 651: 435-441.
[13]Shen Y F, Guan R G, Zhao Z Y, et al. Ultrafine-grained Al-0.2Sc-0.1Zr alloy: The mechanistic contribution of nano-sized precipitates on grain refinement during the novel process of accumulative continuous extrusion[J]. Acta Materialia, 2015, 100: 247-255.

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高Cu含量Al-Cu-Li-Sc合金中W(Al₈Cu₄Sc)相的形成机制

Formation mechanism of W(Al₈Cu₄Sc) phase in Al-Cu-Li-Sc alloy with high Cu content

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