Plastic Deformation
New geometry for TCP: severe plastic deformation of tubes
... Severe Plastic Deformation (SPD) method has fascinated a remarkable attention due to its capabilities such as an impressive improvement of mechanical properties and an extensive grain refinement of ...
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Characterising gross plastic deformation in design by analysis
... radial deformation (at the bore), assuming small deformation theory, for the elastic–perfectly plastic and bilinear hardening materials in ...the plastic zone spreads out towards the outer ...
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A novel method for severe plastic deformation at high strain rate
... Severe plastic deformation (SPD) processing is defined as any method of forming under an extensive hydrostatic pressure that may be used to impart a very high strain to a bulk solid without any significant ...
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Plastic deformation in flat section band clamps
... plastic deformation in the clamp across the full range of friction coefficients. All other properties of the flat-section band were as given in Tables 1 and 2. The same calculation was carried out using the ...
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Characterising gross plastic deformation in design by analysis
... gross plastic deformation in strain hardening structures that do not exhibit geometric ...elastic-perfectly plastic material model is assumed, limit collapse of all three structures occurs when the ...
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Continuous Severe Plastic Deformation Processing of Aluminum Alloys
... A number of severe plastic deformation (SPD) methods for producing bulk UFG metals have been developed since the early 1990s. The significant feature of these processes is that the external dimensions of ...
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Surface Plastic Deformation by Sliding Elliptical Cylinder
... Plastic deformation in surface layer, deems, is dominant factor of the surface plastic technology, and models on the base of ideal plasticity theory [3] [4] is ...ideal plastic flow induced by ...
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FORMATION OF CARBON STEEL STRUCTURE DURING HOT PLASTIC DEFORMATION
... appropriate deformation degrees at each stage of wheel formation, leads to a significant structural inhomogeneity of the metal ...and deformation gradi- ent that occurs at the cross section of the wheel ...
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Relaxation model for dynamic plastic deformation of materials
... for plastic relaxation of stresses in metals has been ...characteristic plastic relaxation time, which is assumed as a material ...of plastic deformation in low defect ...
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PLASTIC DEFORMATION AND EFFECTIVE STRAIN HARDENING
... The measured yield stress and strength hardening coefficient were 1300 MPa and 0.26 for the as received condition, 1340 MPa and 0.27 for irradiation at 500 ° C, and 1510 MPa and 0.32 for irradiation at 600 ° C. In this ...
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Phase Transformations Induced by Severe Plastic Deformation
... Severe plastic deformation (SPD) can induce various phase transformations. After a certain strain, the dynamic equilibrium establishes between defects production by an external force and their relaxation ...
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Severe Plastic Deformation of Steel Induced by Ultrasonic Vibrations
... severe plastic deformation in solid ...tic deformation processes, the small grains thus formed should be free from defects such as surface contamina- tion and porosity that formed during the ...
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The Development of Vacancies during Severe Plastic Deformation
... of deformation-induced vacancies, therefore, disappears by diffusion to sinks at grain boundaries and the surface while vacancies which agglomerate into vacancy clusters remain in the ...
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Gross plastic deformation of axisymmetric pressure vessel heads
... to plastic dissipation in the vessel proposed by Gerdeen in ...the plastic failure mechanisms and the plastic work dissipated in the vessel could provide a rational basis for a plastic ...
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Texture Evolution in Severe Plastic Deformation Processes
... Severe plastic deformation processes involve large grain rotations due to the action of di ff erent modes of plastic deformation and other microstructural changes which lead to characteristic ...
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Plastic Deformation of Polycrystalline Iridium at Room Temperature138-146
... of deformation, whereas the next stage of plastic deformation leads to the cracking of the ...where deformation of the material is considerably higher than in the centre of the ...last ...
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An Overview on the Continuous Severe Plastic Deformation Methods
... the deformation load ...of deformation forces by secluding feeding and plastic deformation stages from each ...the deformation by actuating cyclically with an appropriate angle to the ...
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The Contribution of Severe Plastic Deformation to Research on Superplasticity
... severe plastic deformation (SPD) demonstrated that these techniques provide an opportunity to achieve much smaller grain sizes to the submicrometer or even the nanometer scale and this gives opportunities ...
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Effect of plastic deformation on elastic and plastic recovery in CP-Titanium
... The experimental results showed that the mechanical properties vary for each direction, with the lowest elastic modulus along RD. A significant degradation was observed in elastic modulus (up to 50% reduction) with ...
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Severe cryogenic plastic deformation of copper
... severe plastic deformation (SPD) ...“abc” deformation enable to obtain bulk material but a final grain size is typically significantly large than 100 ...of deformation behaviour of ...
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