Mechanical properties and fracture behavior of an Al–Mg–Sc–Zr alloy at ambient and subzero temperatures

Zhemchuzhnikova, Daria; Mogucheva, Anna; Kaibyshev, Rustam

doi:10.1016/j.msea.2012.12.017

Cited by 47 publications

(63 citation statements)

References 23 publications

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“…lb). Size of the coherent Al3(Sc,Zr) dispersoids ranges from 10 to 15 nm; these precipitations were uniformly distributed within the matrix, while the incoherent Al3(Sc,Zr) particles with an average size of 40 nm precipitated on boundaries [9]. The incoherent Al6Mn dispersoids having plate-like or round shapes with an average thickness of 25 nm were observed within the grain interiors ( Fig.…”

Section: Resultsmentioning

confidence: 91%

“…The incoherent Al6Mn dispersoids having plate-like or round shapes with an average thickness of 25 nm were observed within the grain interiors ( Fig. lb) [9]. The ECAP led to the formation of almost uniform structure with an average grain size of ~ 0.6 ц т and the recrystallized volume fraction more than 90% (Fig.la').…”

Section: Resultsmentioning

confidence: 93%

“…Decreasing temperature leads to transition from ductile transgranular fracture to intergranular brittle fracture (Fig. 3b) [9]. In the material with UFG structure at room temperature, a number of dimples with deep conical shape are observed (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…3a, a'). Fractography of the as-cast 1575C Al was described in previous work [9] in detail. Decreasing temperature leads to transition from ductile transgranular fracture to intergranular brittle fracture (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Kaibyshev

2014

AMR

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Abstract. An aluminum alloy with a chemical composition of and an initial grain size of ~22 ц т was subjected to equal-channel angular pressing (ECAP) at 593 К up to a total strain of ~12. Extensive grain refinement provided the formation of fully recrystallized structure with an average grain size of -0.6 [Ш1. The mechanical properties of the alloy in two different structural conditions were examined at temperatures ranging from 77 to 293 K. It was shown that ECAP highly enhanced the strength, ductility and fracture toughness of the material over the wide temperature interval. Positive effect of grain refinement tends to increase with decreasing temperature due to suppression of brittle intergranular fracture. At ambient temperature, the extensive grain refinement provides +65% increase in yield stress (YS) and ductility, concurrently. At 77 K, YS increase is + 77%, and the ductility increase is +113% owing to grain refinement. Effect of the grain size on fracture toughness at cryogenic temperatures is discussed.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Kaibyshev

2014

AMR

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“…Then these bars were subjected to homogenization annealing at 350 °C during 15 hours [1,3]. After annealing, cylindrical specimens with a diameter 0 d =6 ± 0.1 mm and a height 0 h =9 ± 0.1 mm were machined from the bars.…”

Section: Materials and Investigation Proceduresmentioning

confidence: 99%

Simulation of the rheological behavior of the 01570C alloy under high-temperature deformation

Konovalov¹,

Смирнов²,

Belozerov³

et al. 2016

AIP Conference Proceedings

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Rheological behavior and the formation of the microstructure of a composite based on an AlZn-Mg-Cu alloy with a 10% SiC content AIP Conference Proceedings 1785, 040068 (2016) Abstract. The paper investigates the possibility of using a previously developed mathematical model of strain resistance to describe the rheological behavior of the 01570C alloy (Russian Standard) of an Al-Mg-Sc-Zr system at 300 °C in the range of strain rates between 0.1 and 5 s -1 . The model takes into account hardening due to an increase in dislocation density, as well as the barrier effect of blocking the motion of free dislocations, and softening due to dynamic recovery and dynamic recrystallization. The identification and verification of the model is made by the experimental data of cylindrical specimen compression obtained on a plastometric apparatus built at Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences. According to the verification results, we can conclude that the considered model, with the calculation accuracy acceptable for engineering, describes the rheological behavior of the 01570C alloy at 300 °C for strain rates ranging from 0.1 to 5 s -1 .

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Mechanical Behavior of an Al–Mg–Mn–Sc Alloy with an Ultrafine Grain Structure at Cryogenic Temperatures

Kaibyshev

2015

Adv Eng Mater

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The mechanical properties of an Al-Mg-Mn-Sc alloy with a grain size of %0.7 mm were examined at temperatures ranging from 77 to 293 K. An ultrafine grain structure was produced by equal-channel angular pressing at 593 K up to a total strain of %12. It was demonstrated that extensive grain refinement enhances strength and ductility at ambient and cryogenic temperatures and highly enhances fracture toughness at room temperature. The alloy exhibits a well-defined ductile-brittle transition attributed to the influence of temperature on nucleation and the growth of microvoids.

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Mechanical properties and fracture behavior of an Al–Mg–Sc–Zr alloy at ambient and subzero temperatures

Cited by 47 publications

References 23 publications

Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Effect of Grain Size on Cryogenic Mechanical Properties of an Al-Mg-Sc Alloy

Simulation of the rheological behavior of the 01570C alloy under high-temperature deformation

Mechanical Behavior of an Al–Mg–Mn–Sc Alloy with an Ultrafine Grain Structure at Cryogenic Temperatures

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