Effects of laser processing on the transformation characteristics of NiTi: A contribute to additive manufacturing

Abstract Laser additive manufacturing of NiTi generates complex microstructural features not fully understood yet. Thermal similarities between laser microjoining and laser additive manufacturing, enables correlating the effect of the laser on the material in both processes. To clarify them, a simplified yet accurate approach was employed: in-situ X-ray diffraction was used to determine the local transformation temperatures along the thermally affected regions in a laser processed NiTi thin sheet. The observed gradient of transformation temperatures is related to local chemical compositional changes through Ni depletion and residual stresses, explaining the peculiar microstructural and mechanical features observed in additive manufacturing of NiTi.

[1]  W. Brantley,et al.  Differential scanning calorimetry (DSC) analyses of superelastic and nonsuperelastic nickel-titanium orthodontic wires. , 1996, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[2]  X. Ren,et al.  Physical metallurgy of Ti–Ni-based shape memory alloys , 2005 .

[3]  Yufeng Zheng,et al.  The influence of laser welding parameters on the microstructure and mechanical property of the as-jointed NiTi alloy wires , 2008 .

[4]  P. Ochin,et al.  Martensite Reorientation after Thermal Cycling in NiTiCu Shape Memory Alloys Studied by EBSD Technique , 2016 .

[5]  G. Eggeler,et al.  Effect of low-temperature precipitation on the transformation characteristics of Ni-rich NiTi shape memory alloys during thermal cycling , 2010 .

[6]  Rosa Maria Mendes Miranda,et al.  Martensite stabilization during superelastic cycling of laser welded NiTi plates , 2016 .

[7]  Yinong Liu,et al.  Two-way shape memory effect developed by martensite deformation in NiTi , 1998 .

[8]  N. Zotov,et al.  Stress-induced phase transformations in thermally cycled superelastic NiTi alloys: in situ X-ray diffraction studies , 2015, Powder Diffraction.

[9]  N. Zotov,et al.  Change of transformation mechanism during pseudoelastic cycling of NiTi shape memory alloys , 2017 .

[10]  T. Yue,et al.  Effects of Process Parameters upon the Shape Memory and Pseudo-Elastic Behaviors of Laser-Welded NiTi Thin Foil , 2011 .

[11]  Hong Yang,et al.  Strain dependence of the Clausius–Clapeyron relation for thermoelastic martensitic transformations in NiTi , 2007 .

[12]  Chi Wai Chan,et al.  Laser welding of thin foil nickel–titanium shape memory alloy , 2011 .

[13]  Vasily Ploshikhin,et al.  Evolution of grain structure during laser additive manufacturing. Simulation by a cellular automata method , 2016 .

[14]  Carsten,et al.  SCR , 2020, Catalysis from A to Z.

[15]  Christ P. Paul,et al.  Investigations on the influence of composition in the development of Ni-Ti shape memory alloy using laser based additive manufacturing , 2015 .

[16]  Beth A. Bimber,et al.  Multi-scale shape memory effect recovery in NiTi alloys additive manufactured by selective laser melting and laser directed energy deposition , 2017 .

[17]  C. Maletta,et al.  Functional behaviour of a NiTi-welded joint: Two-way shape memory effect , 2008 .

[18]  Reginald F. Hamilton,et al.  Spatial characterization of the thermal-induced phase transformation throughout as-deposited additive manufactured NiTi bulk builds , 2015 .

[19]  J. S. Zuback,et al.  Additive manufacturing of metallic components – Process, structure and properties , 2018 .

[21]  W. Theisen,et al.  Laser welding of NiTi wires , 2008 .

[22]  P. Zeng,et al.  Experimental observations on mechanical response of three-phase NiTi shape memory alloy under uniaxial tension , 2016 .

[23]  G. Eggeler,et al.  The mechanism of multistage martensitic transformations in aged Ni-rich NiTi shape memory alloys , 2002 .

[24]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[25]  José Luis Ocaña,et al.  Residual stress analysis in laser welded NiTi sheets using synchrotron X-ray diffraction , 2016 .

[26]  Yong Liu,et al.  Criteria for pseudoelasticity in near-equiatomic NiTi shape memory alloys , 1997 .

[27]  F. T. Cheng,et al.  Fatigue behavior of laser-welded NiTi wires in small-strain cyclic bending , 2013 .

[28]  Horst Meier,et al.  On the development of high quality NiTi shape memory and pseudoelastic parts by additive manufacturing , 2014 .

[29]  Beth A. Bimber,et al.  Anisotropic microstructure and superelasticity of additive manufactured NiTi alloy bulk builds using laser directed energy deposition , 2016 .

[30]  Mohammad Elahinia,et al.  Texture, aging, and superelasticity of selective laser melting fabricated Ni-rich NiTi alloys , 2017 .

[31]  Ze Zhang,et al.  EBSD studies of the stress-induced B2–B19′ martensitic transformation in NiTi tubes under uniaxial tension and compression , 2010 .

[32]  Z. Zeng,et al.  Laser welded superelastic Cu–Al–Mn shape memory alloy wires , 2016 .

[33]  José Luis Ocaña,et al.  Effect of laser welding parameters on the austenite and martensite phase fractions of NiTi , 2016 .

[34]  M. Elahinia,et al.  Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting , 2016 .

[35]  W. Crone,et al.  In situ TEM observation of two-step martensitic transformation in aged NiTi shape memory alloy , 2004 .

[36]  O. Ojo,et al.  Numerical modeling of microstructure evolution during laser additive manufacturing of a nickel-based superalloy , 2014 .

[37]  N. Schell,et al.  On the Mechanisms for Martensite Formation in YAG Laser Welded Austenitic NiTi , 2016, Shape Memory and Superelasticity.

[38]  Metall , 1897 .

[39]  T. Mower,et al.  Mechanical behavior of additive manufactured, powder-bed laser-fused materials , 2016 .

[40]  A. Pelton,et al.  Optimisation of processing and properties of medical grade Nitinol wire , 2000 .

[41]  Rosa Maria Mendes Miranda,et al.  Welding and Joining of NiTi Shape Memory Alloys: A Review , 2017 .

[42]  M. Elahinia,et al.  The influence of heat treatment on the thermomechanical response of Ni-rich NiTi alloys manufactured by selective laser melting , 2016 .

[43]  G. Eggeler,et al.  Influence of Ni on martensitic phase transformations in NiTi shape memory alloys , 2007 .

[44]  T. Podder,et al.  X-ray Diffraction Investigations of Shape Memory NiTi Wire , 2015, Journal of Materials Engineering and Performance.

[45]  Wei Min Huang,et al.  The triple-shape memory effect in NiTi shape memory alloys , 2012 .

[46]  K. K. Mahesh,et al.  Effect of thermal cycling on the shape memory transformation behavior of NiTi alloy: Powder X-ray diffraction study , 2007 .

[47]  G. Barbieri,et al.  Fracture Behaviour of Nickel-Titanium Laser Welded Joints , 2009, Journal of Materials Engineering and Performance.

[48]  A. Tuissi,et al.  Effect of Nd-YAG laser welding on the functional properties of the Ni–49.6at.%Ti , 1999 .

[49]  Zach DeVito,et al.  Opt , 2017 .

[50]  A Sensory Material Approach for Reducing Variability in Additively Manufactured Metal Parts , 2017, Scientific Reports.

[51]  A. P. Hammersley,et al.  Two-dimensional detector software: From real detector to idealised image or two-theta scan , 1996 .

[52]  Y. Zhou,et al.  Mechanical and Functional Properties of Laser-Welded Ti-55.8 Wt Pct Ni Nitinol Wires , 2011 .

[53]  H. Wenk,et al.  Rietveld texture analysis from synchrotron diffraction images. II. Complex multiphase materials and diamond anvil cell experiments , 2014, Powder Diffraction.

[54]  N. Schell,et al.  High strain and long duration cycling behavior of laser welded NiTi sheets , 2016 .

[55]  Amirhesam Amerinatanzi,et al.  Fabrication of NiTi through additive manufacturing: A review , 2016 .