Advances in Superplasticity of Ultrafine-Grained Alloys: Recent Research and Development

Valiev, Ruslan Z.; Semenova, Irina P.

doi:10.4028/www.scientific.net/msf.838-839.23

Cited by 7 publications

(6 citation statements)

References 23 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typically, titanium-based alloys are very sensitive to the deformation temperature due to the change in the α/β ratio and grain structure, which affect the superplastic deformation behavior [39,42]. A fine grain structure is required to activate grain boundary sliding, which is a dominant superplastic deformation mechanism for most metallic materials [41][42][43]. The elevated temperature provided the grain boundary sliding phenomenon, as well as the necessary diffusion and dislocation creeping mechanisms, which accommodated the grain boundary sliding.…”

Section: Most Influential Control Parameter Determination Using the Tmentioning

confidence: 99%

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Mosleh

Mikhaylovskaya

Котов

et al. 2018

Metals

View full text Add to dashboard Cite

This paper presents the effect of temperature and strain rate on the superplastic deformation behavior of Ti-3%Mo-1%V-4%Al, Ti-4%V-6%Al, and Ti-1.8%Mn-2.5%Al alloys, which have different initial microstructures. The microstructure, before and after superplastic deformation in the deformation regimes that provided the maximum elongation, was analyzed. The deformation regimes, corresponding to the minimum strain hardening/softening effect, provided a higher elongation to failure due to their low tendency toward dynamic grain growth. As the values of stress became steady (σs), the elongation to failure and strain-hardening coefficient were analyzed under various temperature–strain rate deformation regimes. The analysis of variance of these values was performed to determine the most influential control parameter. The results showed that the strain rate was a more significant parameter than the temperature, with respect to the σs, for the investigated alloys. The most influential parameter, with both the elongation to failure and strain-hardening coefficient, was the temperature of the Ti-3%Mo-1%V-4%Al and Ti-1.8%Mn-2.5%Al alloys and the strain rate of the Ti-4%V-6%Al alloy.

show abstract

Section: Most Influential Control Parameter Determination Using the Tmentioning

confidence: 99%

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Mosleh

Mikhaylovskaya

Котов

et al. 2018

Metals

View full text Add to dashboard Cite

show abstract

“…The temperature of forging can be strongly decreased by the formation of UFG microstructure in workpieces [7]. For example, forging of various items from the alloy Ti-6Al-4V with a UFG structure is possible at temperatures of 550-750 °C [61][62][63]. At the same time, strength and fatigue characteristics significantly exceed the properties of the alloy with conventional structure and plasticity, and toughness and heat resistance meet the required level [63,64].…”

Section: Advanced Superplasticity-based Techniquesmentioning

confidence: 99%

“…For example, forging of various items from the alloy Ti-6Al-4V with a UFG structure is possible at temperatures of 550-750 °C [61][62][63]. At the same time, strength and fatigue characteristics significantly exceed the properties of the alloy with conventional structure and plasticity, and toughness and heat resistance meet the required level [63,64]. Low flow stresses and high elongations provide the possibility of making complex-shape objects by sheet stamping under superplasticity conditions [11,27].…”

Section: Advanced Superplasticity-based Techniquesmentioning

confidence: 99%

Studies on the Superplasticity Effect in UFA: History and Development (In Memory of Prof. O.A. Kaibyshev)

Valiev

Салищев

Utyashev

et al. 2018

Reviews on Advanced Materials Science

Self Cite

View full text Add to dashboard Cite

Prof. O.A. Kaibyshev initiated studies on superplasticity of metals and alloys in Ufa in the 70s-80s of the last century. These studies gave momentum to the development of fundamental and applied studies on superplasticity not only in Russia but in numerous laboratories around the world. This paper highlights the major results of this early work and considers their state-of-the-art and development perspectives for the science and practice of materials superplasticity.

show abstract

“…Topics related to metal forming of UFG materials that will not be addressed in this report include hot forming applications where SPD has been used to improve the material flow, for example, to reduce the stock size, whereas the microstructure and mechanical properties of the formed part play a subordinate role . Superplastic forming of UFG metals will also not be discussed here for similar reasons and due to the fact that it has been addressed already in many articles, reviews and book chapters …”

Section: Introductionmentioning

confidence: 99%

Formability of Ultrafine Grained Metals Produced by Severe Plastic Deformation–An Overview

Bruder

2018

Adv Eng Mater

View full text Add to dashboard Cite

Severe plastic deformation (SPD) techniques have attracted considerable attention due to their capability to refine the grain size of metals and alloys down to the ultrafine grained (UFG) regime. A characteristic feature of SPD processes is that they generate semi-finished parts such as rods or sheets, which require further shaping in order to become marketable products. One approach for the shaping of SPD processed materials is the use of metal forming processes, which can be a challenge with regard to the low work hardening rate and tendency to strain localizations of most UFG metals. This article summarizes the current state of knowledge on the formability and forming behavior of UFG metals under different loading scenarios, discussing both limitations and application potential. Furthermore, the interaction between microstructural aspects and the formability, such as the occurrence of strain localizations during and the role of heat treatments are also addressed. Given that the formability of UFG metals has received far less attention than other aspects so far, this work also aims at identifying apparent contradictions as well as scientific and technological questions that need to be addressed in future to expand the current knowledge of the field.

show abstract

Advances in Superplasticity of Ultrafine-Grained Alloys: Recent Research and Development

Cited by 7 publications

References 23 publications

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Experimental Investigation of the Effect of Temperature and Strain Rate on the Superplastic Deformation Behavior of Ti-Based Alloys in the (α+β) Temperature Field

Studies on the Superplasticity Effect in UFA: History and Development (In Memory of Prof. O.A. Kaibyshev)

Formability of Ultrafine Grained Metals Produced by Severe Plastic Deformation–An Overview

Contact Info

Product

Resources

About