An extraordinary enhancement of strain hardening in fine-grained zirconium

Guo, Defeng; Zhang, Zhibo; Zhang, Guosheng; Li, Ming; Shi, Yindong; Ma, Tengyun; Zhang, Xiangyi

doi:10.1016/j.msea.2013.10.086

Cited by 25 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The analysis of grain structure distributions has shown that there are several types of grains structure characterized by unimodal (near log-normal) distribution, and bimodal grain size distribution, multimodal grain size distribution [2,7,8,35].…”

Section: Computational Modelmentioning

confidence: 99%

“…Hexagonal close-packed (HCP) metals, such as Ti, Mg, Zn and Zr, are of interest for engineering and medical applications due to their unique combination of high ductility and strength. In recent years, intensive efforts have been focused on investigations of the physical and mechanical properties of alloys, whose grain structure is formed by surface rolling, severe plastic deformation, selective laser melting, or selective laser sintering, and friction stir processing [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years it was found that the alloys with a bimodal grain size distribution may exhibit increased yield strength without reducing ductility [7,8]. Guo showed the ductility of fine-grained (FG) Zr with an average grain size of 2-3 μm was 17% higher than that of coarse-grained alloy [2]. Pozdnyakov [9], Malygin [10], Ulacia [11] showed that the bimodal grain distribution can be formed in light alloys by means of severe plastic deformation and follow-up heat treatment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Failure Mechanisms of Alloys with a Bimodal Graine Size Distribution

Skripnyak

2020

Springer Tracts in Mechanical Engineering

View full text Add to dashboard Cite

A multi-scale computational approach was used for the investigation of a high strain rate deformation and fracture of magnesium and titanium alloys with a bimodal distribution of grain sizes under dynamic loading. The processes of inelastic deformation and damage of titanium alloys were investigated at the mesoscale level by the numerical simulation method. It was shown that localization of plastic deformation under tension at high strain rates depends on grain size distribution. The critical fracture stress of alloys depends on relative volumes of coarse grains in representative volume. Microcracks nucleation at quasi-static and dynamic loading is associated with strain localization in ultra-fine grained partial volumes. Microcracks arise in the vicinity of coarse and ultrafine grains boundaries. It is revealed that the occurrence of a bimodal grain size distributions causes increased ductility, but decreased tensile strength of UFG alloys. The increase in fine precipitation concentration results not only strengthening but also an increase in ductility of UFG alloys with bimodal grain size distribution.

show abstract

Section: Computational Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Failure Mechanisms of Alloys with a Bimodal Graine Size Distribution

Skripnyak

2020

Springer Tracts in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Cryo-rolling has been carried out on Al [12,24], Cu [25][26][27], and Ti [28,29] alloys. Recently, Guo et al studied the mechanical properties and microstructure of the cryo-rolled Zr [30][31][32][33]. Kamalnath et al [34] and Goel et al [35] reported their results on the investigation of cryo-rolling of Zircaloy-2.…”

Section: Introductionmentioning

confidence: 99%

Microstructure–mechanical property correlation of cryo rolled Zircaloy-4

Sarkar

Murty

2015

Journal of Nuclear Materials

View full text Add to dashboard Cite

The evolution of microstructure and the mechanical properties of cryo-rolled Zircaloy-4 were both investigated to understand the origin of the alloy's strength processed at a cryogenic temperature. The correlation of dislocation density, grain size and yield stress of the rolled product indicated that an increase in dislocation density due to the suppression of dynamic recovery is the primary source of strengthening.

show abstract

“…Сплавы Zr−Nb представляют интерес для инженерного и медицинского применения благодаря уникальному сочетанию низкой магнитной восприимчивости, хорошей биосовместимости, высокой пластичности, коррозионной и радиационной стойкости [1,2]. Сплавы Zr−1 %Nb и Zr−2.5 %Nb применяются в качестве конструкционных материалов для оболочек современных тепловыделяющих элементов ядерных реакторов, напорных труб и другого оборудования [3].…”

unclassified

EFFECT OF GRAIN SIZE DISTRIBUTION ON THE STRENGTH AND STRAIN PROPERTIES OF Zr-Nb ALLOYS UNDER TENSION AT HIGH STRAIN RATES

Skripnyak¹,

Iokhim²

2020

Tomsk State University Journal of Mathematics and Mechanics

View full text Add to dashboard Cite

Методом многоуровневого компьютерного моделирования исследованно влияние распределения зерен по размерам на механическое поведение сплавов Zr−Nb при высокоскоростном растяжении. Исследовано влияние объемной концентрации крупных зерен на зарождение и рост повреждений. Показано, что сплавы Zr−Nb с зеренными структурами, характеризующимися бимодальным распределением размеров, обладают повышенными прочностными и деформационными характеристиками.

show abstract

An extraordinary enhancement of strain hardening in fine-grained zirconium

Cited by 25 publications

References 32 publications

Failure Mechanisms of Alloys with a Bimodal Graine Size Distribution

Failure Mechanisms of Alloys with a Bimodal Graine Size Distribution

Microstructure–mechanical property correlation of cryo rolled Zircaloy-4

EFFECT OF GRAIN SIZE DISTRIBUTION ON THE STRENGTH AND STRAIN PROPERTIES OF Zr-Nb ALLOYS UNDER TENSION AT HIGH STRAIN RATES

Contact Info

Product

Resources

About