Advertisement

Effects of Ag on microstructure and mechanical properties of 2519 aluminum alloy

  • Li Hui-zhong Email author
  • Zhang Xin-ming 
  • Chen Ming-an 
  • Zhou Zhuo-ping 
Article

Abstract

The effects of Ag on the microstructure and mechanical properties of 2519 aluminum alloy were investigated by means of tensile test, micro-hardness test, transmission electron microscope and scanning electron microscope. The results show that the addition of 0.3% (mass fraction) Ag accelerates 2519 aluminum alloy’s age-hardening, increases its peak hardness and reduces 4 h of peak aged time at 180 °C. The addition of 0.3% (mass fraction) Ag increses the tensile strength at room temperature and elevated temperature. This increment at room temperature and 200 °C is 24 MPa and 78 MPa, respectively. In contrast, the elongation of 2519 aluminum alloy is decreased with Ag addition. The increase of tensile strength of 2519 aluminum alloy with Ag addition is attributed to the high volume fraction of Ω phase.

Key words

2519 aluminum alloy Ag ageing mechanical properties microstructure 

CLC number

TG146 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Fisher J, James J. Aluminum alloy 2519 in military vehicles[J]. Advanced Materials and Processes, 2002, 160(9): 43–46.Google Scholar
  2. [2]
    Carter H B, David H E, Ashok S, et al. Creep crack growth behavior of aluminum alloy 2519: Part I—experimental analysis [J]. ASTM Special Technical Publication, 1997, 1297(1): 3–18.Google Scholar
  3. [3]
    Carter H B, David H E, Ashok S, et al. Transient crack growth behavior in aluminum alloys C415 — T8 and 2519 — T87[J]. Engineering Fracture Mechanics, 1999, 62(1): 1–22.CrossRefGoogle Scholar
  4. [4]
    Kramer L S, Blair T P, Blough S D, et al. Stress-corrosion cracking susceptibility of various product forms of aluminum alloy 2519[J]. Journal of Materials Engineering and Performance, 2002, 11(6):645–650.CrossRefGoogle Scholar
  5. [5]
    CHEN Xian-feng, PENG Da-shu, ZHANG hui, et al. Influence of heat treatment on mechanical properties and stress corrosion sensitivity of 2519 aluminum alloy plate[J]. The Chinese Journal of Nonferrous Metals, 2003, 13(4): 934–938. (in Chinese)Google Scholar
  6. [6]
    Dymek S, Dollar M. TEM investigation of age-hardenable 2519 Al alloy subjected to stress corrosion cracking tests[J]. Materials Chemistry and Physics, 2003, 81(2–3): 286–288.CrossRefGoogle Scholar
  7. [7]
    LI Hui-zhong, ZHANG Xin-ming, CHEN Ming-an, et al. Microstructures and properties of welded joint of 2519 aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(6): 956–960. (in Chinese)Google Scholar
  8. [8]
    ZHANG Xin-ming, GONG Min-ru, LI Hui-zhong, et al. Effect of ageing tempers of aluminum alloy 2519 sheet on intergranular corrosion[J]. Journal of Central South University: Science and Technology, 2004, 35(3): 349–352. (in Chinese)Google Scholar
  9. [9]
    JIANG Da-ming, ZHANG Yu-ping. Effect of trace elements on structures and properties of aluminum alloys [J]. Light Alloy Fabrication Technology, 2001, 29(3): 1–5. (in Chinese)Google Scholar
  10. [10]
    Vietz J T, Polmear I J. The influence of small additions of silver on the ageing of aluminum alloys[J]. Journal of Institute of Metals, 1966, 94(12): 410–418.Google Scholar
  11. [11]
    Murayama M, Hono K. Role of Ag and Mg on precipitation of T1 phase in an Al-Cu-Li-Mg-Ag alloy [J]. Scripta Mater, 2001, 44(4): 701–706.CrossRefGoogle Scholar
  12. [12]
    ZHENG Zi-qiao, YIN Den-feng, TAN Chen-yu. Age-hardening behaviour of a weldable 049 type Al-Li alloy[J]. Journal of Central South University of Technology: Natural Science, 1996, 27(6): 695–698. (in Chinese).Google Scholar
  13. [13]
    ZHENG Zi-qiao, HUANG Bi-ping, YIN Den-feng. Alloying role of Ag and Mg in 2159 alloy[J]. Journal of Central South University of Technology: Natural Science, 1998, 29(1): 42–45. (in Chinese).Google Scholar
  14. [14]
    YI Hong-kun, ZHENG Zi-qiao. The influence of small additions of silver and magnesium on microstructure and properties of Al-Li-Cu system alloys [J]. Journal of Central South University of Technology(Natural Science), 1999, 30(3): 292–294. (in Chinese).Google Scholar
  15. [15]
    Hutchinson C R, Fan X, Pennycook S J, et al. On the origin of the high coarsening resistance of Ω plates in Al-Cu -Mg-Ag alloys[J]. Acta Mater, 2001, 49(14): 2827–2841.CrossRefGoogle Scholar
  16. [16]
    Gablee B M, Fax X, Pennycook S J, et al. The effect of Si additions on precipitation in Al-Cu-Mg-(Ag) alloy[J]. Scripta Mater, 2004, 50(1): 149–153.CrossRefGoogle Scholar
  17. [17]
    Hutchinson C R, Fax X, Pennycook S J, et al. On the origin of the high resistance to coarsening of Ω plates in Al-Cu-Mg-(Ag) alloy using Z-contrast microscopy[J]. Materials Forum, 2000, 331(2): 965–970.CrossRefGoogle Scholar
  18. [18]
    Ringer S P, Yeung W, Muddle B C, et al. Precipitate stability in Al-Cu-Mg-Ag alloys aged at high temperatures[J]. Acta Mater, 1994, 42(5): 1715–1725.CrossRefGoogle Scholar
  19. [19]
    Talyor J A, Parter B A. Precipitation in Al-Cu-Mg-Ag casting alloy [J]. Met Sci, 1978, 12(10): 478–482.CrossRefGoogle Scholar
  20. [20]
    Kerry K, Scott V D. Structure and orientation relationship of precipitates formed in Al-Cu-Mg-Ag alloys [J]. Met Sci, 1984, 18(6): 289–294.CrossRefGoogle Scholar
  21. [21]
    Huang B P, Zheng Z Q. Independent and combined role of trace Mg and Ag additions in properties precipitation process and precipitation kinetics of Al-Cu-Li-(Mg)-(Ag)-Zr-Ti alloys[J]. Acta Mater, 1998, 46(12): 4381–4393.CrossRefGoogle Scholar
  22. [22]
    Murayama M, Hono K. Three dimensional atom probe analysis of pre-precipitate clustering in an Al-Cu-Mg-Ag alloy[J]. Scripta Mater, 1998, 38(8): 1315–1321.CrossRefGoogle Scholar

Copyright information

© Central South University 2006

Authors and Affiliations

  • Li Hui-zhong 
    • 1
    Email author
  • Zhang Xin-ming 
    • 1
  • Chen Ming-an 
    • 1
  • Zhou Zhuo-ping 
    • 1
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina

Personalised recommendations