Paper Titles
Robust Design of UOE Forming Process Based on Support Vector Machine
p.523
Extrusion Simulation and Texture Study on Mg-Y Alloy
p.531
Simulation of the Extrusion Texture of Magnesium Alloy AZ31 Using Crystal Plasticity Finite Element Method
p.538
Influence of Electromagnetic Force on Solidification of Cu-Cr-Zr Alloy
p.545
The Extrusion Cracks of Inconel 625 Superalloy Tubes Caused by the Primary MC Carbides
p.550
Differential Scanning Calorimetry Studies on Ni-Ni3B Alloys
p.556
Effect of Mo on Transformation, Microstructure and Property of Hot-Rolled DP600 Steel
p.560
Influence of FeCrAl Coating Arc Sprayed on Aluminum Corrosion Resistance of H13 Steel
p.565
Wear Resistance of Cu10Al5Fe5Ni Alloy
p.571

The Extrusion Cracks of Inconel 625 Superalloy Tubes Caused by the Primary MC Carbides

Article Preview

Abstract:

Inconel 625 superalloy tubes were hot extruded using a horizontal extruder. Optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) technique were employed to investigate the extrusion defects mainly caused by the primary MC carbides. The results showed that a lot of surface cracks, internal cracks, grooves and shrinkage cavity defects existed in the outer surface and internal of the Inconel 625 superalloy tube after hot extrusion. However, the inner surface of the tube was smooth and no cracks were observed. In addition to the external factors during hot extrusion, the cracks are mainly caused by the primary MC carbides or large dimension of C particles formed due to a relatively short smelting time and large dimension of C particles during smelting with the decreasing plasticity of the grain boundary. This kind of cracks can be avoided through improving the uniformity of the chemical composition by reducing the size of C particles and extending the diffusion time during the smelting of Inconel 625 superalloy.

You might also be interested in these eBooks
Basic Research of Materials View Preview

Info:

Periodical:

Materials Science Forum (Volume 817)

Pages:

550-555

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.817.550

Citation:

Cite this paper

Online since:

April 2015

Authors:

Qing Miao Guo*, Zhen Lei Tang, Guo Liang Xie, Jie Hu, De Fu Li

Keywords:

Cracks, Extrusion Defects, Inconel 625 Superalloy, Primary MC Carbides

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2015 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

References

[1] J. Mittra, J.S. Dubey, S. Banerjee, Acoustic emission technique used for detecting early stages of precipitation during aging of Inconel 625, Scripta Mater. 49 (2003) 1209–1214.

DOI: 10.1016/s1359-6462(03)00488-3

Google Scholar

[2] V. Shankar, K. Bhanu Sankara Rao, S.L. Mannan, Microstructure and mechanical properties of Inconel 625 superalloy, J. Nucl. Mater. 288 (2001) 222–232.

DOI: 10.1016/s0022-3115(00)00723-6

Google Scholar

[3] G.P. Dinda, A.K. Dasgupta, J. Mazumder, Laser aided direct metal deposition of Inconel 625 superalloy: Microstructural evolution and thermal stability, Mater. Sci. Eng. A 509 (2009) 98–104.

DOI: 10.1016/j.msea.2009.01.009

Google Scholar

[4] D.Y. Cai, L.Y. Xiong, W.C. Liu, G.D. Sun, M. Yao, Characterization of hot deformation behavior of a Ni-base superalloy using processing map, Mater. Des. 30 (2009) 921–925.

DOI: 10.1016/j.matdes.2008.05.006

Google Scholar

[5] M. Ahmad, J.I. Akhter, M. Shahzad, M. Akhtar, Cracking during solidification of diffusion bonded Inconel 625 in the presence of Zircaloy-4 interlayer, J. Alloys Compd. 457(2008) 131–134.

DOI: 10.1016/j.jallcom.2007.02.137

Google Scholar

[6] D.C. Chen, C.P. Chen, Investigation into equal channel angular extrusion process of billet with internal defects, J. Mater. Process. Tech. 204 (2008) 419–424.

DOI: 10.1016/j.jmatprotec.2007.11.066

Google Scholar

[7] I. Balasundar, T. Raghu. Investigations on the extrusion defect-Axial hole or funnel. Mater. Des. 31 (2010) 2994–3001.

DOI: 10.1016/j.matdes.2010.01.027

Google Scholar

[8] T Hsu, C. Huang, The friction modeling of different tribological interface in extrusion process, J. Mater. Process. Tech. 140(2003)49–53.

Google Scholar

[9] K. Saanouni, J.F. Mariage, A. Cherouat, P. Lestriez, Numerical prediction of discontinuous central bursting in axisymmetric forward extrusion by continuum damage mechanics, Comput. Struct. 82 (2004) 2309–2332.

DOI: 10.1016/j.compstruc.2004.05.018

Google Scholar

[10] S.J. Yuan, F. Li, Z.B. He, Effects of Guiding Angle on Plastic Metal Flow and Defects in Extrusion of Aluminum Alloy, J. Mater. Sci. Technol. 24(2008) 256-260.

Google Scholar

[11] S. O Onuh, M Ekoja, M. B Adeyemi, Effects of die geometry and extrusion speed on the cold extrusion of aluminium and lead alloys, J. Mater. Process. Tech. 132(2003)274-285.

DOI: 10.1016/s0924-0136(02)00941-x

Google Scholar

[12] L.J. Matienzo, K.J. Holub, An investigation on surface defects produced during the extrusion of some aluminum alloys. HYPERLINK http: /www. sciencedirect. com/science/journal/03785963/15/1, J. Mater. Process. Tech. 15(1983) 307–320.

DOI: 10.1016/0378-5963(83)90025-9

Google Scholar

[13] J.Y. Zhuang, J.H. Du , et al, Wrought Superalloy of GH4169, Chemical composition of GH4169 alloy: Metallurgical Industry Press, Beijing, 2006, pp.5-6.

Google Scholar