Effect of Zr Contents on Mechanical Properties of Cast AlSi7Mg0.4 Alloys

doi:10.11901/1005.3093.2020.228

Chinese Journal of Materials Research

2021, Vol. 35

Issue (3): 209-220 DOI: 10.11901/1005.3093.2020.228

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Effect of Zr Contents on Mechanical Properties of Cast AlSi7Mg0.4 Alloys

ZHANG Yunxiang¹, ZHAO Haidong¹(

), ZHU Lin², LI Changhai², WU Hanqi²

^1.National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China
^2.CITIC Dicastal Co. Ltd. , Qinhuangdao 066011, China

Cite this article:

ZHANG Yunxiang, ZHAO Haidong, ZHU Lin, LI Changhai, WU Hanqi. Effect of Zr Contents on Mechanical Properties of Cast AlSi7Mg0.4 Alloys. Chinese Journal of Materials Research, 2021, 35(3): 209-220.

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Abstract

Ingots of AlSi7Mg0.4 alloys with 0.06%, 0.14% and 0.20% Zr addition respectively were fabricated with gravity casting method. The microstructure analysis of the as-cast alloys shows that (Al, Si)₃(Zr, Ti) and π-Fe phases formed in these alloys. Compared with the AlSi7Mg0.4 alloys without Zr, the grain size of the alloys containing Zr is smaller. Strengthening phase (Al, Si)₃(Zr, Ti) precipitated in the alloys containing Zr during the solution treatment. After T6 heat treatment, a small amount of Mg in the Fe-rich intermetallics and a little part of coarse (Al, Si)₃(Zr, Ti) phases re-dissolved into the matrix, which decreased the intermetallics sizes. The tensile strength and elongation of the alloys containing Zr are 332 MPa and 8.7%, which are 10% and 90% higher than the alloy without Zr, respectively.

Key words: metallic materials AlSi7Mg0.4 alloy microstructure mechanical properties Zr contents (Al, Si)₃(Zr, Ti)

Received: 11 June 2020

ZTFLH:

TG166.3

Fund: Guangdong Province Key Field R & D Program Project(2020B010186002)

About author: ZHAO Haidong, Tel: (020)87112948-302, E-mail: hdzhao@scut.edu.cn

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	Yunxiang ZHANG
	Haidong ZHAO
	Lin ZHU
	Changhai LI
	Hanqi WU

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.228 OR https://www.cjmr.org/EN/Y2021/V35/I3/209

Fig.1 Casting and dimensions of tensile specimen (mm)

Table 1 Chemical composition of the experimental alloys (mass fraction, %)

Fig.2 Age hardening curve of alloys

Fig.3 Microstructures of as-cast alloys (a) alloy 1, (b) alloy 2, (c) alloy 3 and (d) alloy 4

Table 2 Effect of Zr contents on size and SDAS of α-Al grains

Fig.4 Phase diagram of Al-Zr binary alloy

Fig.5 SEM micrograph of the as-cast alloys (a) alloy 1, (b) alloy 2, (c) alloy 3 and (d) alloy 4

Table 3 EDS analyses of the intermetallic phases measured in as-cast alloys (atomic fraction, %) and area fraction

Fig.6 Area-scan maps of the distribution of studied alloys (a~c) alloy 3, (d~f) alloy 4

Fig.7 SEM micrograph of the T6 heat-treated alloys (a) alloy 1, (b) alloy 2, (c) alloy 3 and (d) alloy 4

Table 4 EDS analyses of the intermetallic phases measured in T6 treated alloys (atomic fraction, %) and area fraction

Fig.8 The bright field TEM (BF-TEM) micrographs of the T6 treated alloys (a) alloy 1, (b) alloy 2, (c) alloy 3 and (d) alloy 4

Table 5 Average length, cross-section and number density for the β’’ precipitates derived from TEM results of T6 treated alloys

Fig.9 Bright field TEM images of alloy 3 (a) Al-Si-Zr-Ti precipitates and (b) corresponding SADP along [010] Al axis

Fig.10 TEM images of alloy 4 (a) the Al-Si-Zr-Ti precipitate, (b) fast Fourier transformation (FFT) of Al-Si-Zr-Ti phase along [001] Al axis and (c) TEM-EDS analysis of the Al-Si-Zr-Ti precipitate

Table 6 Average length, aspect and number density for the Al-Si-Zr-Ti precipitates derived from TEM results of T6 treated alloys

Fig.11 HRTEM micrographs (a) semicoherent and (c) coherent interfaces of the Al-Si-Zr-Ti precipitate with α-Al matrix, (b) and (d) corresponding IFFT

Table 7 Mechanical properties of as-cast alloys and T6 heat treated alloys with different Zr content

Fig.12 Tensile fracture morphology (a, b) and SEM-EDS analysis (c, d) of as cas state and T6 heat treatment state of alloy 2 and Tensile fracture morphology (e, f) and SEM-EDS analysis (g, h) of as cas and T6 heat treatment of alloy 4

1	Baradarani B, Raiszadeh R. Precipitation hardening of cast Zr-containing A356 aluminium alloy [J]. Mater. Des., 2011, 32: 935
2	Liu Y Q, Jie W Q, Wang S N, et al. Investigation of rotary bending gigacycle fatigue properties of Al-7Si-0.3Mg alloys [J]. Chin. J. Mater. Res., 2012, 26: 284
	刘永勤, 介万奇, 王善娜等. Al-7Si-0.3Mg铸造合金的旋转弯曲疲劳性能研究 [J]. 材料研究学报, 2012, 26: 284
3	Prach O, Trudonoshyn O, Randelzhofer P, et al. Effect of Zr, Cr and Sc on the Al-Mg-Si-Mn high-pressure die casting alloys [J]. Mater. Sci. Eng., 2019, 759A: 603
4	Teng G B, Liu C Y, Li J, et al. Effect of Sc on microstructure and mechanical property of 7055 Al-alloy [J]. Chin. J. Mater. Res., 2018, 32: 112
	滕广标, 刘崇宇, 李剑等. 添加Sc对7055铝合金微观结构和力学性能的影响 [J]. 材料研究学报, 2018, 32: 112
5	Xu C, Xiao W L, Zheng R X, et al. The synergic effects of Sc and Zr on the microstructure and mechanical properties of Al-Si-Mg alloy [J]. Mater. Des., 2015, 88: 485
6	Colombo M, Gariboldi E, Morri A. Influences of different Zr additions on the microstructure, room and high temperature mechanical properties of an Al-7Si-0.4Mg alloy modified with 0.25% Er [J]. Mater. Sci. Eng., 2018, 713A: 151
7	Mahmudi R, Sepehrband P, Ghasemi H M. Improved properties of A319 aluminum casting alloy modified with Zr [J]. Mater. Lett., 2006, 60: 2606
8	Huang H L, Dong Y H, Xing Y, et al. Low cycle fatigue behaviour at 300℃ and microstructure of Al-Si-Mg casting alloys with Zr and Hf additions [J]. J. Alloy. Compd., 2018, 765: 1253
9	Jia Z H, Huang H L, Wang X L, et al. Hafnium in aluminum alloys: A review [J]. Acta Metall. Sin. (Engl. Lett.), 2016, 29: 105
10	Rahimian M, Amirkhanlou S, Blake P, et al. Nanoscale Zr-containing precipitates; a solution for significant improvement of high-temperature strength in Al-Si-Cu-Mg alloys [J]. Mater. Sci. Eng., 2018, 721A: 328
11	Yuan W H, Liang Z Y. Effect of Zr addition on properties of Al-Mg-Si aluminum alloy used for all aluminum alloy conductor [J]. Mater. Des., 2011, 32: 4195
12	Meng Y, Cui J Z, Zhao Z H, et al. Effect of Zr on microstructures and mechanical properties of an Al-Mg-Si-Cu-Cr alloy prepared by low frequency electromagnetic casting [J]. Mater. Charact., 2014, 92: 138
13	Zhao Q, Wang S X. Aluminum Alloy Selection and Design [M]. Beijing: Chemical Industry Press, 2017: 53
	赵晴, 王帅星. 铝合金选用与设计 [M]. 北京: 化学工业出版社, 2017: 53
14	Wang F, Liu Z L, Qiu D, et al. The influence of the effect of solute on the thermodynamic driving force on grain refinement of Al alloys [J]. Metall. Mater. Trans., 2015, 46A: 505
15	Wang F, Liu Z L, Qiu D, et al. Revisiting the role of peritectics in grain refinement of Al alloys [J]. Acta Mater., 2013, 61: 360
16	Wang F, Qiu D, Liu Z L, et al. The grain refinement mechanism of cast aluminium by zirconium [J]. Acta Mater., 2013, 61: 5636
17	Zhang Y, Gao K Y, Wen S P, et al. The study on the coarsening process and precipitation strengthening of Al3Er precipitate in Al-Er binary alloy [J]. J. Alloy. Compd., 2014, 610: 27
18	Quested T E, Dinsdale A T, Greer A L. Thermodynamic modelling of growth-restriction effects in aluminium alloys [J]. Acta Mater., 2005, 53: 1323
19	Ceschini L, Morri A, Morri A, et al. Correlation between ultimate tensile strength and solidification microstructure for the sand cast A357 aluminium alloy [J]. Mater. Des., 2009, 30: 4525
20	Knipling K E, Dunand D C, Seidman D N. Criteria for developing castable, creep-resistant aluminum-based alloys-A review [J]. Z. Metallkd., 2006, 97: 246
21	Gustafsson G, Thorvaldsson T, Dunlop G L. The influence of Fe and Cr on the microstructure of cast Al-Si-Mg alloys [J]. Metall. Trans., 1986, 17A: 45
22	Beroual S, Boumerzoug Z, Paillard P, et al. Effects of heat treatment and addition of small amounts of Cu and Mg on the microstructure and mechanical properties of Al-Si-Cu and Al-Si-Mg cast alloys [J]. J. Alloy. Compd., 2019, 784: 1026
23	Marioara C D, Andersen S J, Zandbergen H W, et al. The influence of alloy composition on precipitates of the Al-Mg-Si system [J]. Metall. Mater. Trans., 2005, 36A: 691
24	Gao T, Ceguerra A, Breen A, et al. Precipitation behaviors of cubic and tetragonal Zr-rich phase in Al-(Si-) Zr alloys [J]. J. Alloy. Compd., 2016, 674: 125
25	Gao T, Liu X F. Replacement with Each Other of Ti and Zr in the Intermetallics of Al-(Si-)Ti-Zr alloys [J]. J. Mater. Sci. Technol., 2013, 29: 291
26	Lityñska L, Abou-Ras D, Kostorz G, et al. TEM and HREM study of Al₃Zr precipitates in an Al-Mg-Si-Zr alloy [J]. J. Microsc., 2006, 223: 182
27	Huang H L. The effects of Zr and Hf additions on microstructure and high temperature mechanical properties of Al-Si-Mg casting alloy [D]. Chongqing: Chongqing University, 2018
	黄惠兰. Zr和Hf元素对Al-Si-Mg铸造合金微观组织和高温力学性能的影响 [D]. 重庆: 重庆大学, 2018

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