GTA remelting of surface spot defects

• Autorzy: Klimpel A. , Luksa K. , Kik T.
• Języki publikacji: EN

Abstrakty

EN

Purpose: A statistical model that explains the interaction between cross-section dimensions of a GTA remelted spot area and remelting parameters is presented. It will be utilized in the repair of an investment casting made of nickel-based superalloys. Design/methodology/approach: An experimental design of response surface was used to elaborate the model of GTA remelting. Results of experiments were verified experimentally. Findings: The dimensions and volume of a remelted area are a linear function of the GTA welding process parameters. It is possible to remelt small surface defects and keep a smooth surface. Research limitations/implications: Research results are limited to the tested range of parameters and base material properties. Changes in thermal conductivity can strongly influence the presented results. Crack sensitivity of material can restrict the range of parameters. Practical implications: Results of the research will help in the repair of surface spot defects of nickel-based superalloys. The proposed method of repair can help to minimize the number of rejected parts. Originality/value: A new approach to welding technology is presented. A statistical model of GTA remelting process could be a useful tool for the precise selection of process parameters.

Słowa kluczowe

EN

welding; GTA welding; remelting; cast repair

PL

spawanie; spawanie GTA; przetapianie; naprawa uszkodzeń powierzchni odlewu

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 25, nr 2
• Strony: 73--76
• Opis fizyczny: Bibliogr. 15 poz., fot., rys., tab.

Twórcy

autor

Klimpel A.

autor

Luksa K.

autor

Kik T.

• Welding Department, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland,

Bibliografia

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• [2] A. Klimpel, A. Lisiecki, D. Janicki, The influence of the shielding gas on the properties of a laser-melted surface of austenitic stainless steel, Journal of Engineering Manufacture 218/B9 (2004) 1137-1144.
• [3] H.K.D.H. Bhadeshia, Nickel Based Superalloys, http://www.msm.cam.ac.uk/phase-trans/2003/nickel.html .
• [4] D.J. Tillack, Welding superalloys for aerospace application, Welding Journal 1 (2007) 28-32.
• [5] M.B. Henderson, D. Arrell, M. Heobel, R. Larsson, G. Marchant, Nickel-Based Superalloy Welding Practices for Industrial Gas Turbine Application, Science and Technology of Welding and Joining 9 (2002) 13-21.
• [6] O.A. Ojo, M.C. Chaturvedi, On the role of liquated γ’ precipitates in weld heat affected zone microfissuring of a nickel-based superalloy, Materials Science and Engineering A403 (2005) 77-86.
• [7] D. Dye, O. Hunziker, R.C. Reed, Numerical analysis of the weldability of superalloys, Acta Materialia 49 (2001) 683-697.
• [8] O.A. Ojo, N.L. Richards, M.C. Chaturvedi, Microstructural study of weld fusion zone of TIG welded IN 738LC nickel-based superalloy, Scripta Materialia 51 (2004) 683-688.
• [9] M. Qian, J.C. Lippod, The effect of Multiple Postweld Heat Treatment Cycles on the Weldability of Waspalloy, Welding Journal 11 (2002) 233-238.
• [10] N.E. Glover, C.L. Davis, Thermal cycle simulation of a Ni-base superalloy, Scripta Materialia 34/5 (1996) 675-684.
• [11] A. Koren, M. Roman, I. Weisshaus, A. Kaufman, Improving the Weldability of Ni-Base Superalloy 713C, Welding Journal 11 (1982) 348-351.
• [12] H. Li, R.H. Jones, Effect of pre-welding heat treatments on welding a two-phase Ni3Al alloy, Materials Science and Engineering A192/193 (1995) 563-569.
• [13] J.M. Kalinowski, Weldability of a Nickel-based superalloys, NASA Contractor Report 195376, August (1994).
• [14] A.A. Shirali, K.C. Mills, The Effect of Welding Parameters on Penetration in GTA Welds, Welding Journal 7 (1993) 352-347.
• [15] A. Klimpel, K. Luksa, D. Janicki, A. Lisiecki, A.St. Klimpel, GTA and plasma GTA welding of X6CrNiTi18-10 thin plates Proceedings of the Worldwide Congress on Material an: Manufacturing Engineering and Technology COMMENT, Gliwice-Wisła, 2005, 929-944 (in Polish).