... , respectively. It is found that the size of the permanent indentation generated on the surface is linearly dependent on the peak force of the strike. This indicates the force signal can be used to monitor the plastic deformation imposed by each strike. Fig. 9 The correlation of striking peak force...

... that serve as a plastic deformation medium and a chemical precursor, respectively. Orthogonal cutting experiments under base oil lubrication demonstrated that the proposed treatment results in a reduction of cutting and thrust forces, as well as in a reduction of built-up edge formation. These effects...

... to 660 °C, were reached in the regions around the punched holes, leading to melting and resolidification of the material. The total width of the thermally affected regions appeared to be larger at higher energy levels. The combination of heat generated by ohmic heating and by plastic deformation...

... of electric current on perceived dislocation generation and dislocation motion through the lattice structure. Equal channel angular extrusion is used to induce severe plastic deformation into the material. On a similar subject, Mears’ group at Clemson University has presented a paper entitled “Factors...

... the unloading simulation. In classic plasticity theory, the unloading of a material after plastic deformation is assumed to be linearly elastic with the stiffness equal to Young’s modulus. However, several experimental investigations have revealed that this is an incorrect assumption. The unloading...

...William R. Longhurst; Alvin M. Strauss; George E. Cook Friction stir welding (FSW) is a solid state welding process that uses a rotating tool to plastically deform and then forge together materials. This process requires a large axial force to be maintained on the tool as the tool is plunged...

... have been carried out to study the effects of nanoparticles integrated structures during the laser shock peening of aluminum alloys. The LSP experiment of aluminum samples with different particle densities was carried out. The effect of nanoparticle on shock wave propagation, plastic deformation...

... 20 12 2010 20 12 2010 deep drawing finite element analysis genetic algorithms learning (artificial intelligence) neural nets plastic deformation production engineering computing sheet materials deep drawing multilayer sheets optimal blank GONNS FEM In recent...

...Chang Ye; Gary J. Cheng Laser shock induced plastic deformation has been used widely, such as laser shock peening (LSP), laser dynamic forming (LDF), and laser peen forming. These processes have been extensively studied both numerically and experimentally at room temperature. Recently, it is found...

... constitutive law to reflect the severe plastic deformation encountered in the primary and the secondary deformation zones under high strains, strain rates, and temperatures. A critical literature review shows that the available methods to identify the material constitutive equation for the cutting process may...

... largely overestimates the flow stresses under the cutting conditions of high strain rates and temperatures. The large overestimation by the proposed method might be due to the fact that the JC model is not a proper description of the plastic deformation behavior of Inconel 718 under machining...

... to preserve the computational efficiency of inverse FEM, a pseudodeformation theory of plasticity based constitutive equation is proposed, which can well reflect the actual forming condition such as elastic/plastic deformation or loading/unloading condition. The above-mentioned improvements are implemented...

... temperatures, the premolded component can experience a significant plastic deformation due to the thermal softening and the force associated with impingement of the melt flow front. In our previous work, we developed methods to inhibit the plastic deformation by supporting the ends of the mesoscale premolded...

...C. J. Luis Pérez; R. Luri Severe plastic deformation processes have a great deal of importance because of the improvement in mechanical properties of the processed parts as a consequence of the grain size reduction in the material due to the accumulation of deformation. One of the main severe...

... imparts desired deformation while maintaining desired material behavior. Characterization of the residual stress field, plastic deformation, and phase transformation is carried out numerically and is then subsequently validated via experimental results. 10 11 2006 15 12 2008 21 07 2010...

...C. Saldana; S. Swaminathan; T. L. Brown; W. Moscoso; J. B. Mann; W. D. Compton; S. Chandrasekar A class of deformation processing applications based on the severe plastic deformation (SPD) inherent to chip formation in machining is described. The SPD can be controlled, in situ, to access a range...

... of the experimental result. This is due to the fact that the plastic deformation size predicted by FEM is only half of the experimental result but the magnitudes of rotation are almost the same. Similarly, GND contour from FEM simulation can be divided into three distinctive regions, corresponding to the experimental...

...B. Aour; F. Zaïri; M. Naït-Abdelaziz; J. M. Gloaguen; J. M. Lefebvre Equal channel angular extrusion (ECAE) is a relatively novel forming process to modify microstructure via severe plastic deformation without modification of the sample cross section. In this study, an optimized design of die...

... industry lightweight structures magnesium alloys plastic deformation presses pressing sheet materials sheet metal processing weight control 15 02 2007 21 06 2008 09 10 2008 Bolt , P. J. , Lamboo , N. A. P. M. , and Rozier , P. J. C. M. , 2001...

...R. Luri; C. J. Luis Pérez Equal channel angular extrusion (ECAE) or pressing is a process used to introduce severe plastic deformations to processed materials with the aim of improving their mechanical properties by reducing the grain size. At present, there are no analytical studies that have...