Microstructural and mechanical properties of gravity-die-cast A356 alloy inoculated with yttrium and Al-Ti-B grain refiner simultaneously

• Autorzy: Lim Y. P. , Ooi J. B. , Wang X.
• Języki publikacji: EN

Abstrakty

EN

In the present work, the effect of inoculating yttrium and Al-5Ti-1B simultaneously on A356 aluminum alloy has been studied. Gravity die casting process is used to cast the ASTM tensile test specimens for analysis. In each experiment, the Ti and B contents were maintained constantly at 0.1 and 0.02 wt% respectively. The addition of yttrium was manipulated at the amount of 0, 0.1, 0.2, 0.3, 0.4 and 0.5 wt%. Microstructural characterization of the as-cast A356 alloy was investigated by means of optical microscope and its phases are detected by XRD. The mechanical properties tested are tensile strength and hardness. The inoculation of yttrium was found to enhance the grain refinement effect of Al-5Ti-1B grain refiner and improve the mechanical properties. The optimal weight percentage of yttrium was found to be 0.3. The grain refining efficiency of combining yttrium and Al-5Ti-1B on A356 aluminum alloy was mainly attributed to the heterogeneous nucleation of TiB2 and TiAl3 particles which were dispersed more evenly in the presence of yttrium and the grain growth restriction effected by the accumulation of Al-Y compound at grain boundaries.

Słowa kluczowe

EN

A356; Al5Ti1B; yttrium; grain refinement; gravity dies casting; XRD (X ray diffraction)

PL

A356; Al5Ti1B; ITR; rozdrobnienie ziarna; odlewanie ciśnieniowe; XRD

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 4
• Strony: 77--82
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Lim Y. P.

autor

Ooi J. B.

autor

Wang X.

• Department of Mechanical Engineering, Universiti Tunku Abdul Rahman, Kuala Lumpur, 53300 Malaysia,

Bibliografia

• [1] Yücel Birol, "Production of Al-Ti-B master alloys from Ti sponge and KBF4", Journal of Alloys and Compounds 440 (2007), pp. 108-112.
• [2] T. R. Ramachandran, P. K. Sharma, K. Balasubramaniam, "Grain Refinement of Light Alloys", 68th WFC - World Foundry Congress, Feb 2008, pp. 189-193.
• [3] Moustafa M. A., Samuel F. H., Doty H. W., "Effect of solution heat treatment and additives on the microstructure of Al-Si automotive alloys", Journal of Materials Science 2003, Vol 38, pp. 4507-4022.
• [4] Miller W. S., Zhuang L., Bottema J., et al, "Recent development in aluminum alloys for the automotive industry", Materials Science and Engineering A: 2000; Vol 280(1): pp. 37-49.
• [5] Yücel Birol, "Grain refining efficiency of Al-Ti-C alloys", Journal of Alloys and Compounds 422 (2006), pp. 128-131.
• [6] W. O. Ngalaa, H. J. Maier, "Creep-fatigue interaction of the ODS superalloy: PM 1000 ", Materials Science and Engineering A, Vol 510-511, 15 June 2009, Pages 429-433.
• [7] P. J. Zhou, J. J. Yu, X. F. Sun, et al, "Role of yttrium in the microstructure and mechanical properties of a boron-modified nickel-based superalloy", Scripta Materialia 57 (2007), pp. 643-646.
• [8] Li Hui-zhong, Liang Xiao-peng, Li Fang-fang, et al, "Effect of Y content on microstructure and mechanical properties of 2519 aluminum alloy", Transaction of Nonferrous Metals Society of China, Vol 17, 2007, pp. 1194-1198.
• [9] Heat Treating, Metals Handbook, ninth edition, ASM International, Metals Park, OH, volume 4, 1981.
• [10] Xu Chunxiang, Lu Binfeng, Lü Zhengling, et al, Journal of Rare Earths, "Grain refinement of AZ31 magnesium alloy by Al-Ti-C-Y master alloy", Vol. 26, No. 4, Aug 2008, p. 604.
• [11] Chen Yu-yong, Si Yu-feng, Kong Fan-tao, et al, "Effects of yttrium on microstructures and properties of Ti-17Al-27Nb alloy", Transaction of Nonferrous Metals Society of China, Vol 16, 2006, pp. 316-320.