Effects of La2O3 on Microstructure and Properties of Laser Clad Fe-Based Amorphous Composite Coatings

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Abstract:

The Fe-Cr-Si-P amorphous powder with various La2O3 contents was cladded on 304L substrates by laser technology. The effects of La2O3 contents on microstructure and properties of the coatings were investigated. The results showed that the coating mainly consisted of amorphous, Fe3P and Fe2Si phases. A small amount of La2O3 addition could inhibit the epitaxial growth, and refine the dendrite crystals. When the content of La2O3 was 0.1%, the amorphous content of the coating was up to about 55%, and the maximum microhardness was about 900HV0.2.

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583-588

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March 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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[1] J. Fornell, S. González, E. Rossinyol, Enhanced mechanical properties due to structural changes induced by devitrification in Fe-Co-B-Si-Nb bulk metallic glass, Acta Materialia. 58 (2010) 6256-6266.

DOI: 10.1016/j.actamat.2010.07.047

Google Scholar

[2] Y.F. Wang, J. Wu, Q. Wang, et al., The bulk metallic glass formation in Zr-Al-Ni-Ti quaternary system, Materials Letters. 61 (2007) 2066-(2070).

DOI: 10.1016/j.matlet.2006.08.017

Google Scholar

[3] P. l. Zhang, H. Yan, C.W. Yao, et al., Synthesis of Fe-Ni-B-Si-Nb amorphous and crystalline composite coatings by laser cladding and remelting, Surface & Coatings Technology. 206(2011) 1229-1236.

DOI: 10.1016/j.surfcoat.2011.08.039

Google Scholar

[4] C. Suryanarayana, I. Seki, A. Inoue, A critical analysis of the glass-forming ability of alloys, Journal of Non-Crystalline Solids. 355 (2009) 355-360.

DOI: 10.1016/j.jnoncrysol.2008.12.009

Google Scholar

[5] M. Iqbal, J.I. Akhter, H.F. Zhang, et al., Synthesis and characterization of a multicomponent Fe-based bulk amorphous alloy, Journal of Non-Crystalline Solids. 354 (2008) 5363-5367.

DOI: 10.1016/j.jnoncrysol.2008.09.027

Google Scholar

[6] H. Yoshioka, K. Asami, A. Kawashima, et al., Laser-processed corrosion-resistant amorphous Ni-Cr-P-B surface alloys mild steel, Corrosion Science. 27 (1987) 98l-995.

DOI: 10.1016/0010-938x(87)90064-3

Google Scholar

[7] X. Wu, B. Xu, Y. Hong, Synthesis of thick Ni66Cr5Mo4Zr6P15B4 amorphous alloy coating and large glass-forming ability by laser cladding, Materials Letters. 56 (2002) 838-841.

DOI: 10.1016/s0167-577x(02)00624-9

Google Scholar

[8] F. Wang, G. Li, C. S. Wang, et al., Microstructure and properties of laser clad Zr-based alloy coatings on Ti substrates, Surface and Coatings Technology. 176 (2004) 284-289.

DOI: 10.1016/s0257-8972(03)00771-0

Google Scholar

[9] A. Basu, A.N. Samant, S.P. Harimkar, et al., Laser surface coating of Fe-Cr-Mo-Y-B-C bulk metallic glass composition on AISI 4140 steel, Surface & Coatings Technology. 202 (2008) 2623-2631.

DOI: 10.1016/j.surfcoat.2007.09.028

Google Scholar

[10] C.S. Wang, Y.Z. Chen, T. Li, et al., Composition design and laser cladding of Ni-Zr-Al alloy coating on the magnesium surface, Applied Surface Science. 256 (2009) 1609-1613.

DOI: 10.1016/j.apsusc.2009.09.029

Google Scholar

[11] K.J. Huang, C.S. Xie, T.M. Yue, Microstructure of Cu-based amorphous composite coatings oil AZ91D magnesium alloy by laser cladding, Material Science Technical. 25 (2009) 492-498.

Google Scholar

[12] V.K. Balla, A. Bandyopadhyay, Laser Processing of Fe Based Bulk Amorphous Alloy, Surface & Coatings Technology. 10 (2010) 1-26.

DOI: 10.1016/j.surfcoat.2010.10.029

Google Scholar

[13] P.L. Zhang, H. Yan, C.W. Yao, et al., Synthesis of Fe-Ni-B-Si-Nb amorphous and crystalline composite coatings by laser cladding and remelting, Surface & Coatings Technology. 206(2011) 1229-1236.

DOI: 10.1016/j.surfcoat.2011.08.039

Google Scholar

[14] Z.P. Chen, J.E. Gao, Y. Wu, et al., Role of rare-earth elements in glass formation of Al-Ca-Ni amorphous alloys, Journal of Alloys and Compounds. 513 (2012) 387-392.

DOI: 10.1016/j.jallcom.2011.10.054

Google Scholar

[15] X.K. Xi, R.J. Wang, D.Q. Zhao, et al., Glass-forming Mg-Cu-RE (RE=Gd, Pr, Nd, Tb, Y, and Dy) alloys with strong oxygen resistance in manufacturability, Journal of Non-Crystalline Solids. 344 (2004) 105-109.

DOI: 10.1016/j.jnoncrysol.2004.07.056

Google Scholar

[16] X. Xu, L.Y. Chen, G.Q. Zhang, et al., Formation of bulk metallic glasses in Cu45Zr48-xAl7REx (RE=La, Ce, Nd, Gd and 0≤x≤5 at. %), Intermetallics. 15 (2007) 1066-1070.

DOI: 10.1016/j.intermet.2006.12.010

Google Scholar