Microstructures and properties of TiN reinforced Co-based composite coatings modified with Y2O3 by laser cladding on Ti–6Al–4V alloy

Abstract In this study, TiN reinforced composite coatings were fabricated on Ti–6Al–4V substrate by laser cladding with Co42 self-fluxing alloy, TiN and Y 2 O 3 mixed powders. Microstructures and wear resistance of the cladding coatings with and without Y 2 O 3 addition were investigated comparatively. Results showed that the coatings were mainly comprised of γ-Co/Ni, TiN, CoTi, CoTi 2 , NiTi, TiC, Cr 7 C 3 , TiB, Ti 5 Si 3 and TiC 0.3 N 0.7 phases. The coatings showed metallurgical bonding free of pores and cracks with the substrate. Compared with the Ti–6Al–4V substrate, the microhardness and wear resistance of the coatings was enhanced by 3–4 times and 9.5–11.9 times, respectively. With 1.0 wt.% Y 2 O 3 addition, the microstructure of the coating was refined significantly, and the microhardness and dry sliding wear resistance were enhanced further. The effects of Y 2 O 3 were attributed to the residual Y 2 O 3 and decomposed Y atoms.

[1]  F. Weng,et al.  Microstructures and wear properties of laser cladding Co-based composite coatings on Ti–6Al–4V , 2015 .

[2]  Ming-xi Li,et al.  Laser cladding Co-based alloy/SiCp composite coatings on IF steel , 2004 .

[3]  B. Gülenç,et al.  Corrosion and mechanical-microstructural aspects of dissimilar joints of Ti-6Al-4V and Al plates , 2007 .

[4]  Kun Liu,et al.  Investigation on cored-eutectic structure in Ni60/WC composite coatings fabricated by wide-band laser cladding , 2015 .

[5]  G. Frommeyer,et al.  Creep mechanisms in particle strengthened α-Titanium–Ti2Co alloys , 1998 .

[6]  Hongxi Liu,et al.  Corrosion and wear behavior of Ni60CuMoW coatings fabricated by combination of laser cladding and mechanical vibration processing , 2015 .

[7]  T. Squartini,et al.  Phase constituents and microstructure of laser cladding Al2O3/Ti3Al reinforced ceramic layer on titanium alloy , 2011 .

[8]  Hua-ming Wang,et al.  Dry sliding wear property of a laser melting/deposited Ti2Ni/TiNi intermetallic alloy , 2008 .

[9]  R. Kovacevic,et al.  Laser cladding assisted by induction heating of Ni–WC composite enhanced by nano-WC and La2O3 , 2014 .

[10]  Chia-Chieh Shen,et al.  Effects of hydrogen loading and type of titanium hydride on grain refinement and mechanical properties of Ti–6Al–4V , 2014 .

[11]  Hua-ming Wang,et al.  Microstructure and dry sliding wear resistance of CoTi intermetallic alloy , 2009 .

[12]  Kaidong Xu,et al.  Microstructure and interfacial evaluation of Co-based alloy coating on copper by pulsed Nd:YAG multilayer laser cladding , 2010 .

[13]  Y. Lin,et al.  Evolution of the microstructure and tribological performance of Ti–6Al–4V cladding with TiN powder , 2012 .

[14]  T. Cho,et al.  Laser clad Ni-base alloy added nano- and micron-size CeO2 composites , 2008 .

[15]  H. M. Wang,et al.  Microstructure and wear properties of laser clad TiCo/Ti2Co intermetallic coatings on titanium alloy , 2005 .

[16]  Lei Wang,et al.  Tribo-layer and its role in dry sliding wear of Ti–6Al–4V alloy , 2013 .

[17]  W. Yuhang,et al.  Microstructure and Wear Resistance of Laser Clad Cobalt-based Composite Coating on TA15 Surface , 2014 .

[18]  J. Hosson,et al.  Sliding wear resistance of metal matrix composite layers prepared by high power laser , 2005 .

[19]  R. González,et al.  Effect of actual WC content on the reciprocating wear of a laser cladding NiCrBSi alloy reinforced with WC , 2015 .

[20]  Chuanzhong Chen,et al.  Surface modification of titanium alloy with laser cladding RE oxides reinforced Ti3Al–matrix composites , 2012 .

[21]  J. Lackner,et al.  Large-area high-rate pulsed laser deposition of smooth TiCxN1−x coatings at room temperature—mechanical and tribological properties , 2004 .

[22]  Yuling Yang,et al.  Phase constituents and mechanical properties of laser in-situ synthesized TiCN/TiN composite coating on Ti-6Al-4V , 2010 .

[23]  C. Chen,et al.  Improvement in surface performance of Al3Ti+TiB2/(Ni coated WC) laser cladded coating with Al2O3/nano-Y2O3 , 2011 .

[24]  Hua-ming Wang,et al.  Effect of TiNi in dry sliding wear of laser melt deposited Ti2Ni/TiNi alloys , 2008 .

[25]  D. Przestacki,et al.  Laser surface alloying of commercially pure titanium with boron and carbon , 2014 .

[26]  F. Weng,et al.  Research status of laser cladding on titanium and its alloys: A review , 2014 .

[27]  Xian‐Cheng Zhang,et al.  Microstructure and wear resistance of one-step in-situ synthesized TiN/Al composite coatings on Ti6Al4V alloy by a laser nitriding process , 2015 .

[28]  Li Mingxi,et al.  Effect of nano-Y2O3 on microstructure of laser cladding cobalt-based alloy coatings , 2006 .

[29]  A. Clare,et al.  Cladding of pre-blended Ti–6Al–4V and WC powder for wear resistant applications , 2011 .

[30]  Jun Li,et al.  Effect of Y2O3 on the sliding wear resistance of TiB/TiC-reinforced composite coatings fabricated by laser cladding , 2014 .

[31]  D. Yi,et al.  Calculation of glass forming ranges in Al–Ni–RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model , 2010 .

[32]  Yibo Wang,et al.  Microstructure and properties of laser cladding FeCrBSi composite powder coatings with higher Cr content , 2014 .

[33]  Kun Liu,et al.  In-situ synthesized Ni–Zr intermetallic/ceramic reinforced composite coatings on zirconium substrate by high power diode laser , 2015 .

[34]  A. Wang,et al.  Laser alloying of Ti–Si compound coating on Ti–6Al–4V alloy for the improvement of bioactivity , 2014 .

[35]  F. Weng,et al.  Effect of CeO2 and Y2O3 on microstructure, bioactivity and degradability of laser cladding CaO-SiO2 coating on titanium alloy. , 2015, Colloids and surfaces. B, Biointerfaces.

[36]  M. Shamanian,et al.  Microstructure and wear behavior of stellite 6 cladding on 17-4 PH stainless steel , 2011 .

[37]  Hanguang Fu,et al.  Mechanical properties and toughening mechanism of TiB2/NiTi reinforced titanium matrix composite coating by laser cladding , 2015 .

[38]  Minlin Zhong,et al.  Microstructural evolution in high power laser cladding of Stellite 6+ WC layers , 2002 .