Flow and Densification Behaviors of Sintered P/F-10C50 Steel under Hot Compression

Abstract:

The hot deformation and densification behaviors of sintered P/F-10C50 steel were investigated by hot compression tests on Gleeble-1500 thermal mechanical simulator at the temperature ranging from 900 °C to 1000 °C and the strain rate ranging from 0.1 s^-1 to 10 s^-1. The flow and densification characteristics of the tested specimens at different deformation temperatures and strain rates were studied. The flow stress of the sintered steel persistently increases until the end of the test as the result of matrix and geometric work hardening. The higher deformation temperature and strain rate are conductive to the healing of the pores and promote the densification of the sintered steel, while the higher deformation temperature and lower strain rate impede the densification. The constitutive equation of the sintered steel is established by the means of stepwise regression. The flow stresses predicted by the established constitutive equation are in good agreement with the experimental values, and the correlation coefficient (R) and the average absolute relative error (AARE) are 0.9931 and 3.52%, respectively. These results demonstrate the hot deformation behaviors of the sintered P/F-10C50 steel are excellently predicted by the established constitutive equation.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 811-818
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.811
• Online since: March 2016
• Authors: Biao Guo, Chang Chun Ge*, Yi Xu, Qiu Yan Lu, Sui Cai Zhang
• Keywords: Constitutive Equation, Densification, Flow, Hot Compression, P/F-10C50, Powder Forging

References

[1] W. David, PM structural parts move to higher density and performance, Powder Metall. 50 (2007)99-105.

DOI: 10.1179/174329007x209114

[2] E. Ilia, The effect of copper precipitation on mechanical properties at operating temperature of the materials used to manufacture powder forged connecting rods, The 2014 Powder Metallurgy World Congress & Exhibition, Orlando, United States, 2014, May, 18-22.

[3] V. A. Maslyuk, A. A. Mamonova, A. I. Danilenko, Effect of fine structure on mechanical properties of hot-forged powder steels, Powder Metall. Met. Ceram. 46 (2007) 385-391.

DOI: 10.1007/s11106-007-0060-2

[4] C. Menapace, N. Vicente Jr, A. Molinari, Hot forging of Ti-6Al-4V alloy performs produced by spark sintering of powders, Powder Metall. 56 (2013) 102-110.

DOI: 10.1179/1743290112y.0000000003

[5] D. W. Wolla, M. J. Davidson, A. K. Khanra, Studies on the formability of powder metallurgical aluminum-copper composite, Mater. Des. 59 (2014) 151-159.

DOI: 10.1016/j.matdes.2014.02.049

[6] T. C. Joshi, U. Prakash, V. V. Dabhade, Microstructure development during hot forging of Al 7075 powder, J. Alloy. Compd. 639 (2015) 123-130.

DOI: 10.1016/j.jallcom.2015.03.099

[7] Y. C. Lin, X. M. Chen, A critical review of experimental results and constitutive descriptions for metals and alloys in hot working, Mater. Des. 32 (2011) 1733-1759.

DOI: 10.1016/j.matdes.2010.11.048

[8] M. A. Taleghani Jabbari, E. M. Navas Ruiz, M. Salehi, J. M. Torralba, Hot deformation behavior and flow stress prediction of 7075 aluminium alloy powder compacts during compression at elevated temperatures, Mater. Sci. Eng. A 534 (2012) 624-631.

DOI: 10.1016/j.msea.2011.12.019

[9] R. Bhattacharya, Y. J. Lan, B. P. Wynne, B. Davis, W. M. Rainforth, Constitutive equations of flow stress of magnesium AZ31 under dynamically recrystallizing conditions, J. Mater. Process. Technol. 214 (2014) 1408-1417.

DOI: 10.1016/j.jmatprotec.2014.02.003

[10] A. Rajeshkannan, K. S. Pandey, S. Shanmugam, R. Narayanasamy, Deformation behavior of sintered high carbon alloy powder metallurgy steel in powder preform forging, Mater. Des. 29 (2008) 1862-1867.

DOI: 10.1016/j.matdes.2007.02.006

[11] T. K. Kandavel, R. Chandramouli, D. Shanmugasundaram, Experimental study of the plastic deformation and densification behavior of some sintered low alloy P/M steels, Mater. Des. 30 (2009) 1768-1776.

DOI: 10.1016/j.matdes.2008.07.027

[12] K. M. Xue, X. X. Wang, P. Li, C. Wang, X. Zhang, Numerical simulation and experiment of pure molybdenum powder sintered material with porosities during ECAP, Chin. J. Nonferrous Met. 21 (2011) 198-204.

[13] D. W. Wolla, M. J. Davidson, A. K. Khanra, Constitutive modeling of powder metallurgy processed Al-4%Cu performs during compression at elevated temperature, Mater. Des. 65 (2015) 83-93.

DOI: 10.1016/j.matdes.2014.08.069

[14] K. S. Narasimhan, Sintering of powder mixtures and the growth of ferrous powder metallurgy, Mater. Chem. Phys. 67 (2001) 56-65.

DOI: 10.1016/s0254-0584(00)00420-x

[15] A. Basaran, N. Kurgan, R. Varol, Investigation of fatigue properties of shot peened and plasma nitrocarburized P/M FC0205 steel, J. Mech. Sci. Technol. 27(2013) 2315-2322.

DOI: 10.1007/s12206-013-0615-8

[16] R. Narayanasamy, V. Anandakrishnan, K. S. Pandey, Effect of carbon content on instantaneous strain-hardening behavior of powder metallurgy steels, Mater. Sci. Eng. A, 497 (2008) 505-511.

DOI: 10.1016/j.msea.2008.07.053

[17] Y. C. Lin, M. X. Chen, D. X. Wen, M. S. Chen, A physically-based constitutive model for a typical nickel-based superalloy, Comput. Mater. Sci. 84 (2014) 282-289.

DOI: 10.1016/j.commatsci.2013.11.003