Microstructure of Welded Joints of X5CrNiCuNb16-4 (17-4 PH) Martensitic Stainlees Steel After Heat Treatment

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Abstract

The paper presents rezults of microstructure (LM, TEM) investigation and hardness measurments of welded joints in martensitic precipitation hardened stainless steel containing copper, subjected to heat treatment. For the aging temperature up to 540 °C even for the very long times, the microstructure of the welded joints is similar to this one at lower temerature aging. After aging at 620 °C a distinct change of the microstructure was observed. Non-equilibrium solidification conditions of the weld metal, segregation and the diffusion of copper and the elements stablilizing the austenite cause the occurrence of the reverse transformation of the martensite into austenite as fast as just 1 hour at 620 °C. TEM investigations revealed the differences in dispersion of hardening copper precipitates after aging at temperature 620 °C for 1 and 4 hours.

[1] S. Kou, Welding Metallurgy Wiley Interscience, Hoboken NJ 2003.

[2] J. Lippold, D. Kotecki, Welding metallurgy and weld-ability of stainless steels. John Wiley & Sons, Inc., New Jersey, 2005.

[3] E. Tasak, Metalurgia spawania, wyd. Jak, Kraków, 2008.

[4] J.R. Davis, Alloy digest sourcebook: stainless steels, ASM International, 2000.

[5] M. Murayama, K. Hono, Y. Katayama, Microstructural evolution in a 17-4 PH stainless steel after aging at 400°C, Metallurgical and Materials Transactions A 30, 2, 345-353 (1999).

[6] C.R. Dasiin., Weldability of 17-4PH stainless steel in over-aged heat treated condition Science and Technology of Welding & Joining 11, 5, 502-508(7), (2006).

[7] C.N. Hsiao, C.S. Chiou, J.R. Yang, Aging reactions in a 17-4 PH stainless steel, Materials Chemistry and Physics 74, 134-142 (2002).

[8] H.J. Rack, D. Kalish, Metall. Transactions 5, 1595-1605 (1974).

[9] W.C. Leslie, The Physical Metallurgy of Steels, McGraw-Hill Inc., New York, 1981.

[10] K.C. Antony, J. Metall. 15, 1595-1605 (1963).

[11] B. Yerix, M. Guttmann, Materials Science Technology 9, 125-134 (1993).

[12] M.K. Miller, M.G. Burke, Proc. 5th Int. Symp. on the Environmental Degradation of Materials in Nuclear Power Systems- Water Reactors, September 1991 Monterey, ed. E.P. Simonen, American Nuclear Society, La Grange Park, 689-695 (1992). [13] http://www.sandmeyersteel.com/images/17-4PH-Spec-Sheet.pdf, 25.11.2011

[14] A. Ziewiec, E. Tasak, J. Czech, Cracking of welded joints of the 17-4PH stainless martensitic steel precipitation hardened with copper, Archives of Metallurgy and Materials 50, 3, 1055-1061 (2012).

[15] M. Witkowska, A. Zielińska-Lipiec, J. Kowalska, W. Ratuszek, Microstructures changes in a high – manganese austentic Fe-Mn-Al-C steel, Archives of Metallurgy and Materials 59, 3, 975-579 (2014).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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