Ratchetting deformation of super-elastic and shape-memory NiTi alloys

Abstract The ratchetting deformation of super-elastic NiTi alloy was first observed by uniaxial stress-controlled cyclic tests, and the dependence of ratchetting upon the applied stress and loading type was discussed. The evolutions of responded peak/valley strain, nominal elastic modulus and transformation stress, as well as dissipation energy of the alloy during the stress-controlled cyclic loading were investigated. It is shown that the super-elastic NiTi alloy presents significant “transformation ratchetting” which is mainly caused by the cyclic accumulation of remained martensite due to the incomplete reverse transformation from the stress-induced martensite to original austenite, and the transformation ratchetting and its evolution depend greatly upon the applied stress amplitude, mean stress and loading chart. For comparison, the ratchetting deformation of shape-memory NiTi alloy and its dependence upon the loading condition were also observed. It is seen that the ratchetting deformation of shape-memory NiTi alloy under the stress-controlled cyclic loading differs greatly from that of super-elastic NiTi alloy, since no reversible transformation from the austenite to the stress-induced martensite occurs in the shape-memory NiTi alloy during the stress-controlled cyclic loading at room temperature. It means that no transformation ratchetting occurs in the shape-memory NiTi alloy, and the ratchetting deformation of the alloy occurred during the asymmetrical stress-controlled cyclic loading is mainly caused by the cyclic accumulation of visco-plastic deformation of re-oriented martensite, which is similar to the ratchetting deformation of ordinary metals. For both the super-elastic and shape-memory NiTi alloys, a nearly stable stress–strain response with small dissipation energy occurs after certain cycles. Some significant conclusions are obtained, which are useful to establish a constitutive model describing the ratchetting deformation of the NiTi alloys.

[1]  Huseyin Sehitoglu,et al.  Stress dependence of the hysteresis in single crystal NiTi alloys , 2004 .

[2]  Ken Gall,et al.  Effect of microstructure on the fatigue of hot-rolled and cold-drawn NiTi shape memory alloys , 2008 .

[3]  G. Kang,et al.  Experimental study on ratchetting-fatigue interaction of SS304 stainless steel in uniaxial cyclic stressing , 2006 .

[4]  Shuichi Miyazaki,et al.  Effect of mechanical cycling on the pseudoelasticity characteristics of TiNi and TiNiCu alloys , 1995 .

[5]  S. Nemat-Nasser,et al.  Superelastic and cyclic response of NiTi SMA at various strain rates and temperatures , 2006 .

[6]  Yanzhong Zhang,et al.  Superelasticity decay of porous NiTi shape memory alloys under cyclic strain-controlled fatigue conditions , 2008 .

[7]  Rolf Lammering,et al.  Stress-induced transformation behavior of a polycrystalline NiTi shape memory alloy: micro and macromechanical investigations via in situ optical microscopy , 2004 .

[8]  Alessandro Reali,et al.  A three-dimensional model describing stress-induced solid phase transformation with permanent inelasticity , 2007 .

[9]  S. Kwofie,et al.  Fatigue life prediction under conditions where cyclic creep–fatigue interaction occurs , 2007 .

[10]  Ken Gall,et al.  Cyclic deformation mechanisms in precipitated NiTi shape memory alloys , 2002 .

[11]  Donatello Cardone,et al.  Mechanical behaviour of shape memory alloys for seismic applications 1. Martensite and austenite NiTi bars subjected to torsion , 2001 .

[12]  Guozheng Kang,et al.  Ratchetting: Recent progresses in phenomenon observation, constitutive modeling and application , 2008 .

[13]  C. M. Wayman,et al.  Shape-Memory Materials , 2018 .

[14]  Yong Liu,et al.  Thermomechanical training and the shape recovery characteristics of NiTi alloys , 2008 .

[15]  X. Ren,et al.  RECENT DEVELOPMENTS IN THE RESEARCH OF SHAPE MEMORY ALLOYS , 1999 .

[16]  Dimitris C. Lagoudas,et al.  Modeling of transformation-induced plasticity and its effect on the behavior of porous shape memory alloys. Part I: constitutive model for fully dense SMAs , 2004 .

[17]  Manuel Collet,et al.  Shape Memory Alloys Cyclic Behavior: Experimental Study and Modeling , 2006 .

[18]  Ken Gall,et al.  Cyclic deformation behavior of single crystal NiTi , 2001 .

[19]  G. Eggeler,et al.  Conventional and in-situ transmission electron microscopy investigations into multistage martensitic transformations in Ni-rich NiTi shape memory alloys , 2008 .

[20]  M. Abdel-Karim,et al.  Shakedown of complex structures according to various hardening rules , 2005 .

[21]  A. Heckmann,et al.  Structural and functional fatigue of NiTi shape memory alloys , 2004 .

[22]  E. Hornbogen,et al.  Microstructure and tensile properties of two binary NiTi-alloys , 2001 .

[23]  Yinong Liu,et al.  Comparative study of deformation-induced martensite stabilisation via martensite reorientation and stress-induced martensitic transformation in NiTi , 2004 .

[24]  D. Lagoudas,et al.  Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part IV: modeling of minor hysteresis loops , 1999 .

[25]  J. Van Humbeeck,et al.  Microstructure of NiTi shape memory alloy due to tension–compression cyclic deformation , 1998 .

[26]  G. Bourbon,et al.  Thermodynamical model of cyclic behaviour of TiNi and CuZnAl shape memory alloys under isothermal undulated tensile tests , 1996 .

[27]  Shuichi Miyazaki,et al.  Cyclic stress-strain characteristics of TiNi and TiNiCu shape memory alloys , 1995 .

[28]  I. Karaman,et al.  Thermomechanical cyclic response of an ultrafine-grained NiTi shape memory alloy , 2008 .

[29]  Yong Liu,et al.  Cyclic deformation of NiTi shape memory alloys , 1999 .

[30]  N. Ohno,et al.  Kinematic hardening rules with critical state of dynamic recovery, part I: formulation and basic features for ratchetting behavior , 1993 .

[31]  Marcelo A. Savi,et al.  A constitutive model for shape memory alloys considering tensile¿compressive asymmetry and plasticity , 2005 .

[32]  J. Shaw,et al.  The Effect of Uniaxial Cyclic Deformation on the Evolution of Phase Transformation Fronts in Pseudoelastic NiTi Wire , 2001, Adaptive Structures and Material Systems.

[33]  H. Maier,et al.  Hysteresis and deformation mechanisms of transforming FeNiCoTi , 2006 .

[34]  Dimitris C. Lagoudas,et al.  Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part III: evolution of plastic strains and two-way shape memory effect , 1999 .

[35]  Nobutada Ohno,et al.  Recent progress in constitutive modeling for ratchetting , 1997 .

[36]  Jinghong Fan,et al.  A microstructure-based constitutive model for the pseudoelastic behavior of NiTi SMAs , 2008 .

[37]  C. Chung,et al.  Microstructure and martensitic transformation behavior of porous NiTi shape memory alloy prepared by hot isostatic pressing processing , 2004 .

[38]  T. W. Duerig,et al.  Engineering Aspects of Shape Memory Alloys , 1990 .

[39]  Dimitris C. Lagoudas,et al.  Thermomechanical modeling of polycrystalline SMAs under cyclic loading, Part II : material characterization and experimental results for a stable transformation cycle , 1999 .

[40]  H. Maier,et al.  Shape memory and pseudoelastic behavior of 51.5%Ni-Ti single crystals in solutionized and overaged state , 2001 .

[41]  Nobutada Ohno,et al.  Recent Topics in Constitutive Modeling of Cyclic Plasticity and Viscoplasticity , 1990 .

[42]  Y. Liu,et al.  TEM in situ study of the pre-strained NiTi shape memory alloy—driving force for shape recovery? , 2003 .

[43]  Wolfgang Predki,et al.  Cyclic torsional loading of pseudoelastic NiTi shape memory alloys: Damping and fatigue failure , 2006 .

[44]  D. McDowell,et al.  Cyclic thermomechanical behavior of a polycrystalline pseudoelastic shape memory alloy , 2002 .

[45]  Sang-Joo Kim,et al.  Cyclic effects in shape-memory alloys: a one-dimensional continuum model , 1997 .

[46]  G. Kang,et al.  Uniaxial ratchetting and low-cycle fatigue failure of the steel with cyclic stabilizing or softening feature , 2008 .

[47]  Tian Tao.  RESEARCH ADVANCES OF RATCHETING EFFECTS AND CYCLIC CONSTITUTIVE MODELS , 2003 .

[48]  Nobutada Ohno,et al.  Kinematic hardening rules with critical state of dynamic recovery, part II: Application to experiments of ratchetting behavior , 1993 .