Stainless steel to titanium bimetallic structure using LENS

Abstract Laser Engineered Net Shaping (LENS™) is a commercially available additive manufacturing technique that was used for one step manufacturing of bimetallic structures of stainless steel and Ti6Al4V (Ti64) alloy. Two approaches were adopted for manufacturing these bimetallic structures. In the first approach, direct deposition of Ti64 on SS410 substrate and compositionally graded bimetallic structures were attempted without any intermediate bond layer. In the second approach, an intermediate NiCr bond layer (of thickness ∼750 μm) was deposited to minimize thermal and residual stresses for these bimetallic structures. Direct deposition of Ti64 was successful only for a couple of layers before the structures were delaminated. Compositionally graded bonding was unsuccessful with the formation of brittle intermetallics and related residual stresses causing delamination. Using an intermediate NiCr layer, bimetallic structures were successfully fabricated. Our work is focused on LENS™ based processing approach and related microstructural evolution towards bimetallic structures.

[1]  K. Bhanumurthy,et al.  Reactive diffusion between titanium and stainless steel , 1993 .

[2]  K. Bhanumurthy,et al.  Diffusion bonding of commercially pure titanium to 304 stainless steel using copper interlayer , 2005 .

[3]  S. Chatterjee,et al.  Characterization of diffusion bonded joint between titanium and 304 stainless steel using a Ni interlayer , 2008 .

[4]  G. Madhusudhan Reddy,et al.  Friction welding of dissimilar pure metals , 2007 .

[5]  H. Fraser,et al.  Laser deposition of compositionally graded titanium–vanadium and titanium–molybdenum alloys , 2003 .

[6]  Ashish Kumar Nath,et al.  Direct laser cladding of Co on Ti–6Al–4V with a compositionally graded interface , 2009 .

[7]  Jung G. Lee,et al.  Interlayer engineering for dissimilar bonding of titanium to stainless steel , 2010 .

[8]  Yulei Wang,et al.  Relative slipping of interface of titanium alloy to stainless steel during vacuum hot roll bonding , 2009 .

[9]  R. Karppi,et al.  The application of electron beam welding for the joining of dissimilar metals: an overview , 1996 .

[10]  S. Kashani-Bozorg,et al.  Joining of CP-Ti to 304 stainless steel using friction stir welding technique , 2010 .

[11]  R. Shiue,et al.  Infrared brazing of Ti-6Al-4V and 17-4 PH stainless steel with (Ni)/Cr barrier layer(s) , 2008 .

[12]  Amit Bandyopadhyay,et al.  Application of Laser Engineered Net Shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants , 2009, Journal of materials science. Materials in medicine.

[13]  Jinglong Li,et al.  Diffusion bonding titanium to stainless steel using Nb/Cu/Ni multi-interlayer , 2012 .

[14]  M. Ghosh,et al.  Diffusion bonded transition joints of titanium to stainless steel with improved properties , 2003 .

[15]  S. A. Mousavi,et al.  Experimental investigation of explosive welding of cp-titanium/AISI 304 stainless steel , 2009 .

[16]  J. W. Huang,et al.  Phase transformation diffusion bonding of titanium alloy with stainless steel , 2006 .

[17]  M. Ghosh,et al.  Effect of interface microstructure on the bond strength of the diffusion welded joints between titanium and stainless steel , 2005 .

[18]  B. Mishra,et al.  The effect of intermetallics on the strength properties of diffusion bonds formed between Ti–5.5Al–2.4V and 304 stainless steel , 2003 .

[19]  W. Tillmann,et al.  Solid state diffusion bonding of titanium to steel using a copper base alloy as interlayer , 2009 .

[20]  X. Yue,et al.  Hot pressing diffusion bonding of a titanium alloy to a stainless steel with an aluminum alloy interlayer , 2008 .

[21]  S. Chatterjee,et al.  Interfacial microstructure and mechanical properties of diffusion-bonded titanium–stainless steel joints using a nickel interlayer , 2006 .

[22]  S. A. Mousavi,et al.  Effect of post-weld heat treatment on the interface microstructure of explosively welded titanium–stainless steel composite , 2008 .

[23]  Jung G. Lee,et al.  High strength bonding of titanium to stainless steel using an Ag interlayer , 2009 .

[24]  Amit Bandyopadhyay,et al.  Functionally graded Co-Cr-Mo coating on Ti-6Al-4V alloy structures. , 2008, Acta biomaterialia.

[25]  Andrew A. Shapiro,et al.  Developing Gradient Metal Alloys through Radial Deposition Additive Manufacturing , 2014, Scientific Reports.

[26]  B. Mishra,et al.  Effects of Intermetallic Phases on the Bond Strength of Diffusion-Bonded Joints between Titanium and 304 Stainless Steel Using Nickel Interlayer , 2007 .

[27]  P. He,et al.  Diffusion Bonding Technology of a Titanium Alloy to a Stainless Steel Web With an Ni Interlayer , 1999 .

[28]  M. Domack,et al.  Development of nickel‐titanium graded composition components , 2005 .

[29]  M. Eroglu,et al.  Diffusion Bonding of a Microduplex Stainless Steel to Ti-6Al-4V , 2001 .

[30]  S. Richter,et al.  Roll‐Bonded Titanium/Stainless‐Steel Couples, Part 1: Diffusion and Interface‐Layer Investigations , 2009 .

[31]  Jung G. Lee,et al.  Microstructure and bonding strength of titanium-to-stainless steel joints brazed using a Zr–Ti–Ni–Cu–Be amorphous filler alloy , 2010 .