... and it is able to simulate the effects of applied stresses on the TWSME as well as partial thermal cycles, which generate incomplete martensitic transformations. A systematic comparison between experimental measurements, carried out under different values of applied stress, and numerical predictions...

... hysteresis martensitic transformations Nickel-titanium (NiTi) shape memory alloys (SMAs) exhibit pseudoelastic hysteresis behavior (Fig. 1 ) associated with stress-induced austenite-martensite phase transformations when subjected to cyclic stress∕strain loadings above a critical temperature...

.... The heat exchange with the surroundings is introduced using a Newtonian-approach with a constant coefficient, δ . T R is the room temperature. Moreover, the latent heat of martensitic transformation is taken into account. As the simplest possibility, a constant amount of energy per...

...P. Šittner; V. Novák; P. Lukáš; M. Landa Thermomechanical behavior of superelastic NiTi wires undergoing sequential B 2 - R - B 19 ′ martensitic transformation was investigated by two recently developed in-situ experimental methods (in-situ neutron diffraction and combined ultrasonic and electric...

... effects viscoelasticity martensitic transformations damping elastic moduli 07 09 2005 24 01 2006 2006 American Society of Mechanical Engineers ...

... boundary in reverse to that observed during relaxation. This process has the diffusionless nature and the invariant-plane strain of a martensitic transformation and is similar to those in shape memory alloys in phenomenology. The reversibility of the relaxation and loading processes endows the nanowires...

... February 4, 2004; revision received September 23, 2004. Review conducted by: M. Cherkaoui. 04 February 2004 23 September 2004 22 02 2005 titanium alloys nickel alloys shape memory effects martensitic transformations compressive testing stress-strain relations elastic...

...A. M. Karlsson Recent studies have shown that Pt-aluminide—a common bond coat material in thermal barrier coatings—undergoes martensitic transformations during thermal cycling. The transformations are associated with both large transformation strain and a strain hysteresis, leading to accumulation...

... elastoplasticity solid-state phase transformations diffusion martensitic transformations chemical potential micromechanics First order phase transformations in metals are both of physical and technical relevance in heat treatment and/or deformation process. Typically the resulting microstructure...

...R. Kubler; M. Berveiller; M. Cherkaoui; K. Inal During the martensitic transformation in elastic-plastic materials, the local transformation strain as well as the plastic flow inside austenite are strongly related with the crystallographic orientation of the austenitic lattice. Two mechanisms...

... manuscript received April 4, 2002. Associate Editor: C. Brinson. 22 October 2001 04 April 2002 30 09 2002 nickel alloys titanium alloys shape memory effects martensitic transformations reverse martensitic transformations differential scanning calorimetry bending finite...

... isothermal conditions. The large recoverable strains experienced by these materials are due to an athermal thermoelastic martensitic phase transformation in the material (Huo et al. 1 , 2 ; Shaw et al. 3 ). Martensitic transformation in SMAs is a crystalline...

...Mohammed Cherkaoui, Professor; La´szlo´ S. To´th, Professor micromechanics plasticity dislocation motion twinning internal stresses inclusions elastoplasticity viscoplasticity grain size martensitic transformations dislocation structure crystal microstructure grain boundaries...

.... Guest Editors: Mohammed Cherkaoui and La´slo´ S. To´th. 23 March 2001 28 June 2001 plasticity micromechanics creep martensitic transformations ductility plastic flow To ensure that steel remains the material of choice for automotive bodies, the challenges of designing...