Microstructure, Mechanical Properties and Corrosion Behaviour of Iron - Manganese PM Materials Pressed and Sintered Once and Twice

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Abstract

Elemental iron and manganese powders were blended to form mixtures containing 25, 30 and 35wt.% Mn. Mixtures were compressed into prismatic bars and sintered. Some of the bars were repressed and resintered. Compared to a bar pressed and sintered once, the bar pressed and sintered twice possessed a higher relative density, a higher bending stiffness, and a grid microindentation data set with a lower variance. Bars were immersed in Hank's solution for eight weeks. After this procedure, the bending stiffness were found reduced for all bars except for those pressed, sintered and only repressed, the bending stiffness of which remained unchanged. The repressing has most likely closed up throats connecting the clusters of pores with the free surface of a bar, reducing thus a surface area exposed to a corrosive attack. The resintering has opened up those throats, the electrolyte could fill accessible pores and corrosion weakened the near-surface material, reducing thus a bar's bending stiffness.

[1] Hermawan, H., Dubé, D., Mantovani, D.: Acta Biomaterialia, vol. 6, 2010, p. 1693

[2] Moravej, M., Purnama, A., Fiset, M., Couet, J., Mantovani, D.: Acta Biomaterialia, vol. 6, 2010, p. 1843

[3] Xu, Z., Hodgson, MA., Cao, PA.: Materials Science and Engineering: A, vol. 630, 2015, p. 116

[4] Hermawan, H.: Biodegradable Metals. From Concept to Application. Heidelberg : Springer, 2012

[5] Wegener, B., Sievers, B., Utzschneider, S., Müller, P., Jansson, V., Rößler, S., Nies, B., Stephani, G., Kieback, B., Quadbeck, P.: Materials Science and Engineering: B, vol. 176, 2011, p. 1789

[6] Witte, F.: Acta Biomaterialia, vol. 6, 2010, p. 1680

[7] Xu, Z., Hodgson, MA., Cao, P.: Metals, vol. 6, 2016, p. 309

[8] Kupková, M., Hrubovčáková, M., Kupka, M., Oriňaková, R., Morovská Turoňová, A.: International Journal of Electrochemical Science, vol. 10, 2015, p. 9256

[9] Kupková, M., Hrubovčáková, M., Zeleňák, A., Sulowski, M., Cias, A., Oriňáková, R., Morovská Turoňová, A., Žáková, K., Kupka, M.: Arch. Metall. Mater., vol. 60, 2015, p. 639

[10] Kupková, M., Hrubovčáková, M., Kupka, M.: Mater. Sci. Forum, vol. 844, 2016, p. 46

[11] Peng, Q., Song, Ch., Xia, W., Zhai, Q. In: TMS 2013 Annual Meeting Supplemental Proceedings. New Jersey : John Wiley & Sons, 2013, p. 869

[12] Lee, YK., Jun, JH., Choi, CS.: ISIJ Int., vol. 37, 1997, p. 1023

[13] Danninger, H., Gierl, C.: Science of Sintering, vol. 40, 2008, p. 33

[14] Hryha, E., Dudrová, E., Nyborg, L.: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 41, 2010, p. 2880

[15] German, RM.: Sintering: From Empirical Observations to Scientific Principles. Oxford: Elsevier Butterworth-Heinemann, 2014

[16] Soboyejo, W.: Mechanical Properties of Engineered Materials. New York : Marcel Dekker, 2003

[17] Su, D., He, YL., Liu, JQ., Lu, XG. In: 1st Int. Conference on Information Science, Machinery, Materials and Energy. Eds. X. Ching, V. Dvorik. Chongquing : Atlantis Press, Curran Associates, Inc, 2015, p. 1840

[18] Hosford, WF.: Iron and Steel. New York : Cambridge University Press, 2012

[19] Kupková, M., Kupka, M., Strobl, S., Černý, M., Khatibi, G., Gierl, C.: Scripta Materialia, vol. 57, 2007, p. 639

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