بررسی تجربی و عددی ایجاد دانه‌ سرگردان در فرآیند رشد تک‌بلور سوپرآلیاژ پایه نیکل

مهندسی متالورژی و مواد

مقاله 2، دوره 28، شماره 2 - شماره پیاپی 16، شهریور 1396، صفحه 13-26   

نوع مقاله: علمی و پژوهشی

شناسه دیجیتال (DOI): 10.22067/ma.v28i2.35238

نویسندگان

محسن قنبری حقیقی^* ؛ سعید شبستری؛ محمدرضا ابوطالبی

علم و صنعت ایران

چکیده

جوانه‌زنی دانه‌های سرگردان در فرآیند رشد تک‌بلور به روش بریجمن در سرعت رشد 3، 5 و 7 میلی‌متر بر دقیقه مورد ارزیابی قرار گرفت. بررسی‌ها نشان‌دهنده کاهش گرادیان دمایی در اثر افزایش سرعت حرکت نمونه از کوره و جوانه‌زنی دانه‌های سرگردان در جلوی جبهه رشد دانه-های ستونی است. بررسی‌های عملی رشد تک‌بلور سوپرآلیاژ پایه نیکل نشان داد که سرعت رشد 3 میلی‌متر بر دقیقه منجر به ایجاد ساختار تک‌بلور با جهت بلوری نزدیک به >001< در راستای خروج حرارت می‌شود. در سرعت‌های رشد بیش از 3 میلی‌متر بر دقیقه، جوانه‌زنی دانه هم‌محور رخ می‌دهد.

کلیدواژه‌ها

رشد تک‌بلور؛ دانه‌های سرگردان؛ گرادیان دمایی؛ سرعت رشد؛ شبیه‌سازی عددی

سایر فایل های مرتبط با مقاله

2-ghanbari_AK_EDITS.pdf

مراجع

1. Reed R.C., "The Superalloys: Fundamentals and Applications", Cambridge University Press, Cambridge, (2006).

2. Ross E.W., Sims C.T., "Superalloy", John Wiley & Sons, New York, (1987).

3. Gell M., Duhl D.N., Giamei A.F., “Superalloys”, American Society for Metals, Metals Park, OH, (1980).

4. McLean M., "Directionally Solidified Materials for High Temperature Service", The Metals Society, (1983).

5. Versnyder F., Shank F.E., "The Development of Columnar Grain and Single Crystal High Temperature Materials through Directional Solidification", Materials Science and Engineering, Vol. 6, pp. 213-247, (1970).

6. Zhou Y.Z., Green N.R., "Mechanism of Competitive Grain Growth In Directional Solidification Of A Nickel-Base Superalloy", Acta Materialia, Vol. 56, pp. 2631–263, (2010).

7. Meng X.B., Lua Q., Zhang X.L., Li J.G., Chen Z.Q, Wang Y.H., Zhou Y.Z., Jin T., Sun X.F., Hu Z.Q., "Mechanism Of Competitive Growth During Directional Solidification Of A Nickel-Based Superalloy In A Three-Dimensional Reference Frame", Acta Materialia, Vol. 60, pp. 3965–3975, (2012).

8. Xinbao Zh., Lin L., Weiguo Zh., Min Q., Jun Zh., Hengzhi F., "Analysis of Competitive Growth Mechanism of Stray Grains of Single Crystal Superalloys during Directional Solidification Process", Rare Metal Materials and Engineering, Vol. 40, 9 -13, (2011).

9. Zhou Y.Z., Green N.R., "Mechanism of Competitive Grain Growth in Directional Solidification of A Nickel-Base Superalloy", Acta Materialia, Vol. 56, pp. 2631–2637, (2011).

10. Zhou Y., Volek A., "Effect Of Carbon Additions On Hot Tearing Of A Second Generation Nickel-Base Superalloy", Materials Science and Engineering A, Vol. 479, pp. 324-332, (2009).

11. Cutler E.R., Wasson A.J., Fuchs G.E., "Effect Of Minor Alloying Additions On The Solidification Of Single-Crystal Ni-Base Superalloys", Journal of Crystal Growth, Vol. 311, pp. 3753–3760., (2009).

12. Gunduz M., Adirli E.C., "Directional Solidification of Aluminium–Copper Alloys", Materials Science and Engineering A, Vol. A327, pp. V, (2002).

13. Ares A.E., Gueijman S.F., Schvezov C.E., "An Experimental Investigation of The Columnar-To-Equiaxed Grain Transition In Aluminium–Copper Hypoeutectic And Eutectic Alloys", Journal of Crystal Growth, Vol. 312, pp. 2154–2170, (2010).

14. Willers B., Eckert S., Michel B., Haase I., Zouhar G., "The Columnar-To-Equiaxed Transition In Pb–Sn Alloys Affected By Electromagnetically Driven Convection", Materials Science and Engineering A, Vol. 402, pp. 55-65, (2005).

15. Dong Q., Zhang J., Dong J., Xie H., Li Zh., Dai Y., Liu Y., Sun B., "In Situ Observation of Columnar-To-Equiaxed Transition In Directional Solidification Using Synchrotron X-Radiation Imaging Technique", Materials Science and Engineering A, Vol. 530, pp. 271-276, (2011).

16. Dantzig J.A., Rappaz M., "Solidification", EPFL Press, (2009).

17. Rappaz M., "Probabilistic Modeling of Microstructure Formation in Solidification Processes", Acta Metallurgica Materialia, Vol. 41, pp. 345-360, (1993).

18. Lin Zh., Cai-bei Zh., "Two-Dimensional Cellular Automaton Model for Simulation Structure Evolution of Binary Alloys during Solidification", Transactions of nonferrous metals society of China, Vol. 16, pp. 1410-1416, (2006).

19. Ying L., Qingyan L., Baicheng L., "A Modified Cellular Automaton Method for The Modelling Of Dendritic Morphology Of Binary Alloys", Tsinghua Science and Technology, Vol. 11, pp. 495-500, (2006).

20. Gandin Ch., Rappaz M., "a coupled finite element cellular automaton model for the prediction of the dendritic grain structure in solidification processes", Acta Metallurgica Materialia, Vol. 42, No. 7, pp. 2233-2246, (1994).

21. Gandin Ch., Desbioles J., Rappaz M., Thevez Ph., "A three-dimensional cellular automaton-finite element model for prediction of solidification grain structures", Metallurgical and Materials Transactions A, Vol. 30A, pp. 3153-3165, (1999).

22. Toloraiy, V.N., Orekhov N.G., Kablov E.N., "Advanced Method for Single Crystal Casting Of Turbine Blades For Gas Turbine Engines And Plants", Metal Science and Heat Treatment, Vol. 44, No. 7 – 8, pp.11-16 (2002).

23. Poirier D.R, "Transport phenomena in materials processing", ed. TMS. (1994).

24. Kurz W., Fischer D.J., "Fundamentals of Solidification", Trans Tech Publications, (1986).

25. Kurz W., Giovanola B., Trivedi R., "Theory of Microstructural Development during Rapid Solidification", Acta Metallurgica Materialia, Vol. 34, No. 5, pp. 823.-830, (1986).

26. Elliott, A.J., Tin S., King W.T., Huang S.C, Gigliotti M.F., Pollock T.M., "Directional Solidification of Large Superalloy Castings with Radiation and Liquid-Metal Cooling: A Comparative Assessment", Metallurgical and Materials Transactions A, Vol. 35A, pp. 3221-3231, (2004).

27. Li, X., Fautrelle Y., Ren Zh., Gagnoud A., Zhang Y., Esling C., "Morphological instability of interface, cell and dendrite during directional solidification under strong magnetic field", Journal of Crystal Growth, Vol. 318, pp. 23–27, (2011).

28. Zhou, Y., "Formation of stray grains during directional solidification of a nickel-based superalloy", Scripta Materialia, Vol. 65, pp. 281–284, (2011).