Modeling of phase transformations of Ti6Al4V during laser metal deposition

Abstract The low density, excellent high temperature mechanical properties and good corrosion resistance of titanium and its alloys have led to a diversified range of successful applications. As a consequence, there is a demand of increasing the capabilities of processing such alloys. The laser cladding technique allows direct metal deposition with an excellent metallurgical bond and a pore free fine grained microstructure. A nonlinear transient thermo-metallurgical model was developed to study the technique with titanium alloys to get a better understanding of the thermal and metallurgical underlying aspects. The calculated temperatures and phase transformations are compared with experimental tests.

[1]  M. Lima.  Laser beam welding of titanium nitride coated titanium using pulse-shaping , 2005 .

[2]  Chun-hua Xu,et al.  Temperature and stress fields of multi-track laser cladding , 2009 .

[3]  Imre Felde,et al.  Handbook of thermal process modeling of steels , 2009 .

[4]  F. Prinz,et al.  Thermal stresses and deposition patterns in layered manufacturing , 2001 .

[5]  T. Liub,et al.  A study on the hardness variation of-and-pure titanium with different grain sizes , 2005 .

[6]  Yun Peng,et al.  Melt pool shape and dilution of laser cladding with wire feeding , 2000 .

[7]  J. Planell,et al.  Influence of tempering temperature and time on the α′-Ti-6Al-4V martensite , 1996 .

[8]  Z. Yang,et al.  Effect of phase transformations on laser forming of Ti-6Al-4V alloy , 2005 .

[9]  A. Gasser,et al.  Hard coatings based on thermal spray and laser cladding , 2009 .

[10]  Jack Beuth,et al.  Process Maps for Laser Deposition of Thin-Walled Structures , 1999 .

[11]  N. Järvstråt,et al.  Development of a Microstructure Model for Metal Deposition of Titanium Alloy Ti-6Al-4V , 2007 .

[12]  A. M. Deus,et al.  Rapid tooling by laser powder deposition : Process simulation using finite element analysis , 2005 .

[13]  Miss A.O. Penney.  (b) , 1974, The New Yale Book of Quotations.

[14]  Qi Wang,et al.  Properties, and Applications , 2005 .

[15]  K. Mills.  Recommended Values of Thermophysical Properties for Selected Commercial Alloys , 2001 .

[16]  Jiansheng Pan,et al.  Handbook of Thermal Process Modeling Steels , 2008 .

[17]  N. Järvstråt,et al.  Modelling Ti-6Al-4V microstructure by evolution laws implemented as finite element subroutines: : Application to TIG metal deposition , 2008 .

[18]  B. Basu,et al.  Electrochemical Behavior of Ti-Based Alloys in Simulated Human Body Fluid Environment , 2005 .

[19]  E. Toyserkani,et al.  3-D finite element modeling of laser cladding by powder injection: effects of laser pulse shaping on the process , 2004 .

[20]  Giuseppe Casalino,et al.  Investigation on Ti6Al4V laser welding using statistical and Taguchi approaches , 2005 .

[21]  Chongdu Cho,et al.  Computational mechanics of laser cladding process , 2004 .

[22]  Subhransu Roy,et al.  Development of theoretical process maps to study the role of powder preheating in laser cladding , 2006 .

[23]  Yun Peng,et al.  Time-dependent FEM simulation of dilution control of laser cladding by adaptive mesh method , 2000 .

[24]  Wei Sha,et al.  Titanium Alloys: Modelling of Microstructure, Properties and Applications , 2009 .

[25]  Chongdu Cho,et al.  Application of 3-D finite element method using Lagrangian formulation to dilution control in laser cladding process , 2003 .

[26]  M. Peel,et al.  Study of residual stresses generated inside laser cladded plates using FEM and diffraction of synchrotron radiation , 2010 .

[27]  Valentin N. Moiseyev,et al.  Titanium Alloys: Russian Aircraft and Aerospace Applications , 2005 .