Effect of Sc and Zr additions on grain stability and superplasticity of the simple thermal–mechanical processed Al–Zn–Mg alloy sheet

Duan, Youteng; Xu, Guofu; Peng, Xiaoyan; Deng, Yunlai; Li, Z.; Yin, Zhi-min

doi:10.1016/j.msea.2015.09.049

Cited by 39 publications

(13 citation statements)

References 35 publications

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“…3(b) shows that many fine Al 3 (Sc, Zr) particles of 5-30 nm with Ashby-Brown contrast [19] are randomly distributed both within the grain interiors and at the grain boundaries. These nano-scaled Al 3 (Sc, Zr) particles can strongly pin the dislocations and grain boundaries during the preparation of the sheets [20,21]. Therefore, a stable and fine grained structure is obtained.…”

Section: Fig 2 Schematic Of the Methods To Measure Shear Strainmentioning

confidence: 99%

Achieving high strain rate superplasticity of an Al-Mg-Sc-Zr alloy by a new asymmetrical rolling technology

Cao

Zhang

et al. 2016

Materials Science and Engineering: A

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Section: Fig 2 Schematic Of the Methods To Measure Shear Strainmentioning

confidence: 99%

Achieving high strain rate superplasticity of an Al-Mg-Sc-Zr alloy by a new asymmetrical rolling technology

Cao

Zhang

et al. 2016

Materials Science and Engineering: A

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“…erefore, thermal-mechanical processing (TMP) [41][42][43], which is mainly based on the principles of static recrystallisation [44][45][46][47] and dynamic recrystallisation [48,49], is also an important way to develop superplasticity of Al alloys.…”

Section: Superplastic Formability Of Almentioning

confidence: 99%

A Review on Superplastic Formation Behavior of Al Alloys

Wang

et al. 2018

Advances in Materials Science and Engineering

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Superplastic formation technology is considered to be an effective and promising method to conquer formation difficulties of Al alloys, especially thin-walled or complex structure. In this paper, fundamentals of superplastic deformation of Al alloys are summarized and the superplastic deformation behaviors of main kinds of Al alloys are summarized and compared, including Al-Mg alloys, Al-Li alloys, and Al-Zn-Mg alloys as well as aluminum matrix composites. Then, the superplastic deformation mechanism for different Al alloys is thoroughly discussed. Last but not the least, the factors affecting the superplastic deformation process are fully analyzed.

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“…Upon further cooling, the peritectic reaction progresses and transforms the primary crystals into secondary phase crystals, which then act as nuclei for solidification of the remaining melt [15]. The role of the new nucleation sites is to block the grain boundary or sub-boundary migration, which refine the cast grain structure [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…The effect of Zr on the mechanical properties of commercial purity Al [12] and other Al alloys [13,[20][21][22] has been investigated. Gao et al [12] found that addition of Zr with 0.2 wt.% to commercial purity Al refined the cast structure significantly by precipitating L12 structured Al3Zr primary phase.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Commercial Purity Aluminum Modified by Zirconium Micro-Additives

et al. 2021

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The mechanical properties and the fractured surfaces of commercial purity aluminum modified by zirconium micro-additives were investigated by means of experimental examination. A commercial purity Al specimen was used as a reference material and seven Al-Zr alloys in the 0.02–0.14 wt.% Zr composition range (with 0.02 wt.% Zr step) were prepared by microalloying methods. Optical microscopy was used to examine the microstructures and to calculate the grain sizes of the prepared specimens. The phase assemblage diagrams were plotted and the relative amounts of solid phases were calculated at room temperature using FactSage thermochemical software and databases. Proof stress, strength coefficient and strain hardening exponent were measured from the stress-strain curves obtained from tensile experiments and Charpy impact energy was calculated for all specimens. The experiments showed that the grain size of commercial purity Al was reduced by adding any Zr concentration in the investigated composition range, which could be due to the nucleation of new grains at Al3Zr particle sites. Accordingly, the microhardness number, tensile properties and Charpy impact energy were improved, owing to the large grain-boundary areas resulted from the refining effect of Zr, which can limit the movement of dislocations in the refined samples. The basic fracture mode in all specimens was ductile, because Al has an FCC structure and remains ductile even at low temperatures. The ductile fractures took place in a transgranular manner as could be concluded from the fractured surface features, which include voids, ridges and cavitation.

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Effect of Sc and Zr additions on grain stability and superplasticity of the simple thermal–mechanical processed Al–Zn–Mg alloy sheet

Cited by 39 publications

References 35 publications

Achieving high strain rate superplasticity of an Al-Mg-Sc-Zr alloy by a new asymmetrical rolling technology

Achieving high strain rate superplasticity of an Al-Mg-Sc-Zr alloy by a new asymmetrical rolling technology

A Review on Superplastic Formation Behavior of Al Alloys

Mechanical Properties of Commercial Purity Aluminum Modified by Zirconium Micro-Additives

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