Advertisement

Journal of Central South University

, Volume 26, Issue 10, pp 2651–2660 | Cite as

Effect of complex modification of Al-5Ti and Al-3P on hypereutectic Al-18Si alloys

  • Jian-hua Wang (王建华)
  • Wei Yang (杨威)
  • Hao Tu (涂浩)
  • Ya Liu (刘亚)
  • Hao-ping Peng (彭浩平)
  • Xu-ping Su (苏旭平)Email author
Article
  • 15 Downloads

Abstract

The solidification microstructure, fracture morphologies, and mechanical properties of an Al-18Si alloy and alloys modified with Al-5Ti and Al-3P master alloys were investigated using an optical microscope, scanning electron microscope, and an electronic universal testing machine. The results show that additions of Al-5Ti and Al-3P have significant effects on the size and area fraction of the primary Si and the mechanical properties of the Al-18Si alloy. Compared to the Al-18Si alloy modified with 0.6 wt% Al-5Ti at 850 °C, when the Al-18Si alloy was modified with 0.3 wt% Al-5Ti and 0.5 wt% Al-3P at the same temperature, the average size of the primary Si decreased from 39 to 14 μm and the area fraction increased from 9.5% to 11.6%. The biggest influencing factor on the tensile strength and elongation of the Al-18Si alloy is the addition of Al-3P, followed by the modification temperature and the addition of Al-5Ti. At a modification temperature of 850 °C, the tensile strength and elongation of the Al-18Si alloy modified with 0.3 wt% Al-5Ti+0.5 wt% Al-3P increased by 19.6% and 88.6%, respectively compared to that of the Al-18Si alloy modified with 0.6 wt% Al-5Ti.

Key words

hypereutectic Al-Si alloy modification solidification structure mechanical properties 

Al-5Ti 和Al-3P 对过共晶Al-18Si 合金的复合变质效果

摘要

本文采用光学显微镜、扫描电子显微镜和电子万能试验机等仪器,研究了Al-5Ti 和Al-3P 变质 Al-18Si 合金的凝固组织、断口形貌和力学性能。结果表明,与0.6%Al-5Ti 变质Al-18Si 合金相比, 在850 °C 温度下采用0.3wt%Al-5Ti 和0.5wt%Al-3P 对Al-18Si 合金进行复合变质处理,使合金中初晶 硅平均尺寸从39 μm 减小到14 μm,其面积分数从9.5%增加到11.6%。对合金抗拉强度和延伸率影响 最大的因素是Al-3P,其次是变质温度和Al-5Ti。0.3wt%Al-5Ti 和0.5wt%Al-3P 变质Al-18Si 合金的抗 拉强度和延伸率分别比0.6%Al-5Ti 变质Al-18Si 合金的提高19.6%和88.6%。w

关键词

过共晶铝硅合金 变质处理 凝固组织 力学性能 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    LIANG Song-mao, SCHMIDF-FETZER R. Phosphorus in Al-Si cast alloys: Thermodynamic prediction of the AlP and eutectic (Si) solidification sequence validated by microstructure and nucleation undercooling data [J]. Acta Materialia, 2014, 72: 41–56. DOI: 10.1016/j.actamat.2014.02.042.CrossRefGoogle Scholar
  2. [2]
    LI Da-kui, ZUO Min, ZHANG Qian, LIU Xiang-fa. The investigation of continuous nucleation and refinement of primary Si in Al-30Si mushy zone [J]. Journal of Alloys and Compounds, 2010, 502(2): 304–309. DOI: 10.1016/j.jallcom.2010.04.165.CrossRefGoogle Scholar
  3. [3]
    WANG Shou-ren, MA Ru, WANG Ying-zi, WANG Yong, YANG Li-ying. Growth mechanism of primary silicon in cast hypoeutectic Al-Si alloys [J]. Transactions of Nonferrous Metals Society of China, 2012, 22(6): 1264–1269. DOI: 10.1016/S1003-6326(11)61314-9.CrossRefGoogle Scholar
  4. [4]
    STADLER F, ANTREKOWITSCH H, FRAGNER W, KAUFMANN H, PINATEL E R, UGGOWITZER P J. The effect of main alloying elements on the physical properties of Al-Si foundry alloys [J]. Materials Science and Engineering A, 2013, 560(2): 481–491. DOI: 10.1016/j.msea.2012.09.093.CrossRefGoogle Scholar
  5. [5]
    ZHU Jian-bin, YAN Hong, YE He-yuan, AI Fan-rong. Corrosion behavior of SiC foam ceramic reinforced Al-23Si composites in NaCl solution [J]. Journal of Central South University, 2017, 24(9): 1934–1940. DOI: 10.1007/s11771-017-3601-y.CrossRefGoogle Scholar
  6. [6]
    SUN Jian-feng, ZHANG Liang, WU Guo-hua, LIU Wen-cai, HU Zhao-hua, CHEN An-tao. Refinement of primary Si in Al-20%Si alloy by MRB through phosphorus additions [J]. Journal of Materials Processing Technology, 2015, 225: 485–491. DOI: 10.1016/j.jmatprotec.2015.06.031.CrossRefGoogle Scholar
  7. [7]
    CAMPBELL J, TIRYAKIOĞLU M. Review of effect of P and Sr on modification and porosity development in Al-Si alloys [J]. Materials Science and Technology, 2015, 26(3): 262–268. DOI: 10.1179/174328409X425227.CrossRefGoogle Scholar
  8. [8]
    CAO Fu-yang, JIA Yan-dong, PRASHANTH K G, MA Pan, LIU Jing-shun, SCUDINO S, HUANG Feng, ECKERT J, SUN Jian-fei. Evolution of microstructure and mechanical properties of as-cast Al-50Si alloy due to heat treatment and P modifier content [J]. Materials & Design, 2015, 74(7): 150–156. DOI: 10.1016/j.matdes.2015.03.008.CrossRefGoogle Scholar
  9. [9]
    ZHANG Qian, LIU Xiang-fa, DAI Hong-shang. Re-formation of AlP compound in Al-Si melt [J]. Journal of Alloys and Compounds, 2009, 480(2): 376–381. DOI: 10.1016/j.jallcom.2009.02.080.CrossRefGoogle Scholar
  10. [10]
    ZUO Min, LIU Xiang-fa, DAI Hong-shang, LIU Xiang-jun. Al-Si-P master alloy and its modification and refinement performance on Al-Si alloys [J]. Rare Metals, 2009, 28(4): 412–417. DOI: 10.1007/s12598-009-0080-9.CrossRefGoogle Scholar
  11. [11]
    YU Li-na, LIU Xiang-fa, DING Hai-min, BIAN Xiu-fang. A new nucleation mechanism of primary Si by like-peritectic coupling of AlP and Al4C3, in near eutectic Al-Si alloy [J]. Journal of Alloys and Compounds, 2007, 429(1, 2): 119–125. DOI: 10.1016/j.jallcom.2006.04.011.CrossRefGoogle Scholar
  12. [12]
    ZHOU Xiao-lu, WU Yu-ying, LI Yi-fan, WU Long, GAO Tong, LI Hui, LIU Xiang-fa. Absorbing formation mechanism of AlP on TiB2 substrate and their application as high-efficiency nucleating agent in Al-45Si alloy [J]. Journal of Alloys and Compounds, 2017, 693: 853–858. DOI: 10.1016/j.jallcom.2016.09.274.CrossRefGoogle Scholar
  13. [13]
    LIU Wen-yi, XIAO Wen-long, XU Cong, LIU Mao-wen, MA Chao-li. Synergistic effects of Gd and Zr on grain refinement and eutectic Si modification of Al-Si cast alloy [J]. Materials Science and Engineering A, 2017, 693: 93–100. DOI:10.1016/j.msea.2017.03.097.CrossRefGoogle Scholar
  14. [14]
    SUN Yu-jie, WANG Qing-lei, GENG Hao-ran. Effects of complex modificating technique on microstructure and mechanical properties of hypereutectic Al-Si alloys [J]. Journal of Materials Science, 2012, 47(5): 2104–2109. DOI: 10.1007/s10853-011-6010-x.CrossRefGoogle Scholar
  15. [15]
    XU Cong, XIAO Wen-long, ZHENG Rui-xiao, HANADA S, YAMAGATA H, MA Chao-li. The synergic effects of Sc and Zr on the microstructure and mechanical properties of Al-Si-Mg alloy [J]. Materials & Design, 2015, 88: 485–492. DOI: 10.1016/j.matdes.2015.09.045.CrossRefGoogle Scholar
  16. [16]
    WANG Q L, GENG H R, ZUO M, LONG F, PENG X. Effects of melt thermal rate treatment and modification of P and RE on hypereutectic Al-Si-Cu-Mg alloy [J]. Materials Science and Technology, 2013, 29(10): 1233–1240. DOI: 10.1179/1743284713Y.0000000267.CrossRefGoogle Scholar
  17. [17]
    CHEN Chong, LIU Zhong-xia, REN Bo, WANG Ming-xing, WENG Yong-gang, LIU Zhi-yong. Influences of complex modification of P and Re on microstructure and mechanical properties of hypereutectic Al-20Si alloy [J]. Transactions of Nonferrous Metals Society of China, 2007, 17(2): 301–306. DOI: 10.1016/S1003-6326(07)60089-2.CrossRefGoogle Scholar
  18. [18]
    XU C L, JIANG Q C. Morphologies of primary silicon in hypereutectic Al-Si alloys with melt overheating temperature and cooling rate [J]. Materials Science and Engineering A, 2006, 437(2): 451–455. DOI: 10.1016/j.msea.2006.07.088.MathSciNetCrossRefGoogle Scholar
  19. [19]
    JIANG Q C, XU C L, WANG H Y, WANG J G, YANG Y F. Estimation of the shifting distance of the eutectic point in hypereutectic Al-Si alloys by the lever rule [J]. Scripta Materialia, 2007, 56(5): 329–332. DOI: 10.1016/j.scriptamat.2006.11.023.CrossRefGoogle Scholar
  20. [20]
    WANG Jian-hua, HUANG Jian-feng, SU Xu-ping, WU Chang-jun. Effect of reverse modification of Al-5Ti-B master alloy on hypoeutectic ZnAl4Y alloy [J]. Materials & Design, 2012, 38: 133–138. DOI: 10.1016/j.matdes.2012.01.044.CrossRefGoogle Scholar
  21. [21]
    GONG Chun-jie, TU Hao, WU Chang-jun, WANG Jian-hua, SU Xu-ping. Study on microstructure and mechanical properties of hypereutectic Al-18Si alloy modified with Al-3B. [J]. Materials, 2018, 11(3): 456. DOI: 10.3390/ ma11030456.CrossRefGoogle Scholar
  22. [22]
    LIU Liang, LI Kai-liang, LIU Ya, WU Chang-jun, SU Xu-ping, WANG Jian-hua. Effect of Al-5Ti-B alloy on hypereutectic Al-18Si alloy modification [J]. Materials Science and Engineering of Powder Metallurgy, 2016, 21(1): 59–64. https://www.researchgate.net/publication/316561685. (in Chinese)Google Scholar
  23. [23]
    GHADIMI H, NEDJHAD S H, EGHBALI B. Enhanced grain refinement of cast aluminum alloy by thermal and mechanical treatment of Al-5Ti-B master alloy [J]. Transactions of Nonferrous Metals Society of China, 2013, 23(6): 1563–1569. DOI: 10.1016/S1003-6326(13)62631-X.CrossRefGoogle Scholar
  24. [24]
    CHEN Xu, ZHONG Yun-bo, ZHENG Tian-xiang, SHEN Zhe, WANG Jiang, FAN Li-jun, ZHAI Yong, PENG Ming-hu, ZHOU Bang-fei, REN Wei-li, LEI Zuo-sheng, REN Zhong-ming, HE Qiong. Refinement of primary Si in the bulk solidified Al-20 wt.%Si alloy assisting by high static magnetic field and phosphorus addition [J]. Journal of Alloys and Compounds, 2017, 714: 39–46. DOI: 10.1016/j.jallcom. 2017.04.085.CrossRefGoogle Scholar
  25. [25]
    WANG Shuo, FU Min, LI Xia-zhang, WANG Jian-hua, SU Xu-ping. Microstructure and mechanical properties of Al-Si eutectic alloy modified with Al-3P master alloy [J]. Journal of Materials Processing Technology, 2018, 255: 105–109. DOI: 10.1016/j.jmatprotec.2017.12.008CrossRefGoogle Scholar
  26. [26]
    WANG Shuo, LIU Ya, PENG Hao-ping, LU Xiao-wang, WANG Jian-hua, SU Xu-ping. Microstructure and mechanical properties of Al-12.6Si eutectic alloy modified with Al-5Ti master alloy [J]. Advanced Engineering Materials, 2017, 19(12): 1700495. DOI: 10.1002/adem. 201700495.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Jiangsu Key Laboratory of Materials Surface Science and Technology, School of Materials Science and EngineeringChangzhou UniversityChangzhouChina
  2. 2.Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringChangzhou UniversityChangzhouChina
  3. 3.National Experimental Teaching Demonstration Center of Materials Science and EngineeringChangzhou UniversityChangzhouChina

Personalised recommendations