Abstract
The appearance of carbon migration in the 9% Cr-CrMoV dissimilar welded joint was resulted from the sharp content transition of the strong carbide -forming element Cr between the weld (~2.3 wt%) and the base metal (~10.6 wt%). The width of the carbon-enriched zone (CEZ) under original state was about 46 μm, and the width of CEZ increased and then kept in 65 μm during the 10,000 h aging treatment. The microhardness test showed that the carbon-depleted zone (CDZ) exhibited low hardness value (~220 HV) compared with that (~340 HV) in CEZ. The significant difference in carbide content was the crucial factor in the sharp change of hardness adjacent to the fusion line. Thus, it is important to understand the evolution of the CEZ to experience a long-term aging to avoid its negative influence on the impact toughness and fatigue performance.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Gupta SK, Pandey KN, Kumar R (2015) Comparison of ANN and regression modeling for predicting the responses of friction stir welded dissimilar AA5083-AA6063 aluminum alloys joint. Appl Mech Mater 813–814:415–419
Shang YB, Shi HJ, Wang ZX, Zhang GD (2015) In-situ SEM study of short fatigue crack propagation behavior in a dissimilar metal welded joint of nuclear power plant. Mater Des 88:598–609
Ding K, Wang P, Liu X, Li XH, Zhao BG, Gao YL (2018) Formation of lamellar carbides in alloy 617-HAZ and their role in the impact toughness of alloy 617/9%Cr dissimilar welded joint. J Mater Eng Perform 27(11):6027–6039
Ding K, Zhao BG, Huo X, Fan MJ, Li XH, Zhang YH, Wei T, Wu GZ, Gao YL (2019) Failure transition mechanism of stress rupture performance of the Inconel 625/9 pct Cr steel dissimilar welded joint. Metall Mater Trans A. https://doi.org/10.1007/s11661-019-05372-0
Dehaghi EM, Moshayedi H, Sattari-Far I, Arezoodar A (2017) Residual stresses due to cladding, buttering and dissimilar welding of the main feed water nozzle in a power plant reactor. Int J Press Vessels Pip 152:56–64
Guo Q, Lu FG, Liu X, Yang RJ, Cui HC, Gao YL (2015) Correlation of microstructure and fracture toughness of advanced 9Cr/CrMoV dissimilarly welded joint. Mater Sci Eng A 638:240–250
Rahmani M, Eghlimi A, Shamanian M (2014) Evaluation of microstructure and mechanical properties in dissimilar austenitic/super duplex stainless steel joint. J Mater Eng Perform 23(10):3746–3753
Liu LM, Wang SX, Zhao LM (2008) Study on the dissimilar magnesium alloy and copper lap joint by TIG welding. Mater Sci Eng A 476(1–2):206–209
Ramachandran KK, Murugan N, Shashi Kumar S (2015) Effect of tool axis offset and geometry of tool pin profile on the characteristics of friction stir welded dissimilar joints of aluminum alloy AA5052 and HSLA steel. Mater Sci Eng A 639:219–233
Hosseini HS, Alishahi M, Shamanian M (2012) Zonular evaluation of inconel 617/310 SS dissimilar joint by shear punch test. Mater Lett 67(1):259–262
Bouché K, Barbier F, Coulet A (1998) Intermetallic compound layer growth between solid iron and molten aluminium. Mater Sci Eng A 249(1–2):167–175
Chen SH, Huang JH, Ma K, Zhang HQ, Zhao XK (2012) Influence of a Ni-foil interlayer on Fe/Al dissimilar joint by laser penetration welding. Mater Lett 79:296–299
Wang YQ, Cui HC, Fan MJ, Chen YX, Lu FG (2019) Characterization on the gradient microstructure near the fusion interface of dissimilar metal between high Cr heat-resistant steel and Ni-based Alloy 617. Mater Charact 151:227–236
Ding K, Ji HJ, Liu X, Wang P, Zhang QL, Li XH, Gao YL (2018) Prevention of carbon migration in 9% Cr/CrMoV dissimilar welded joint by adding tungsten inert gas overlaying layer. J Iron Steel Res Int 25:847–853
Wu QJ, Lu FG, Cui HC, Liu X, Wang P, Gao YL (2015) Soft zone formation by carbon migration and its effect on the high-cycle fatigue in 9% Cr-CrMoV dissimilar welded joint. Mater Lett 141:242–244
Abe F (2008) Precipitate design for creep strengthening of 9% Cr tempered martensitic steel for ultra-supercritical power plants. Sci Technol Adv Mater 9(1):1–15
Wei YH, Qiao SF, Lu FG, Liu W (2016) Failure transition mechanism in creep rupture of modified casting 9Cr-1.5Mo-1Co welded joint. Mater Des 97:268–278
Liu X, Cai ZP, Deng XL, Lu FG (2017) Investigation on the weakest zone in toughness of 9Cr/NiCrMoV dissimilar welded joint and its enhancement. J Mater Res 32(16):3117–3127
Rahman S, Priyadarshan G, Raja KS, Nesbitt C, Misra M (2008) Investigation of the secondary phases of alloy 617 by scanning kelvin probe force microscope. Mater Lett 62(15):2263–2266
Kang JH, Rivera-Díaz-Del-Castillo PEJ (2013) Carbide dissolution in bearing steels. Comput Mater Sci 67:364–372
Sandberg N, Henriksson KOE, Wallenius J (2008) Carbon impurity dissolution and migration in bcc Fe-Cr: first-principles calculations. Phys Rev B 78(9):1–7
Lin RQ, Cui HC, Lu FG, Huo X, Wang P (2016) Study on the microstructure and toughness of dissimilarly welded joints of advanced 9Cr/CrMoV. J Mater Res 31(22):3597–3609
Wen T, Hu XF, Song YY, Yan DS, Rong LJ (2013) Carbides and mechanical properties in a Fe–Cr–Ni–Mo high-strength steel with different V contents. Mater Sci Eng A 588:201–207
Liu W, Liu X, Lu FG, Tang XH, Cui HC, Gao YL (2015) Creep behavior and microstructure evaluation of welded joint in dissimilar modified 9Cr-1Mo steels. Mater Sci Eng A 644:337–346
Acknowledgements
The authors gratefully acknowledge the National Natural Science Foundation of China (Grant no. U1760102) and the financial support by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning and Shanghai Science and Technology Committee (Grant no. 13DZ1101502).
Author information
Authors and Affiliations
Corresponding authors
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Ding, K. et al. (2020). Formation of the Carbon-Enriched Zone and Its Evolution During the Long-Term Aging Process for 9% Cr-CrMoV Dissimilar Welded Joint. In: Li, J., et al. Characterization of Minerals, Metals, and Materials 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36628-5_27
Download citation
DOI: https://doi.org/10.1007/978-3-030-36628-5_27
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-36627-8
Online ISBN: 978-3-030-36628-5
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)