Dynamic precipitation in Mg-3Al-1Zn alloy during different plastic deformation modes

Dogan, E.; Wang, S.; Vaughan, M.W.; Караман, И.

doi:10.1016/j.actamat.2016.06.011

Cited by 67 publications

(16 citation statements)

References 36 publications

(29 reference statements)

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“…The results reveled that both the strength and ductility of Mg alloy can be greatly improved after the application of ECAP process owing to obvious grain refinement. According to the paths during ECAP process, the ECAP can be executed through four ways: path A, path Bc, path Ba and path C. Previous work showed that the ECAP paths have significant effect on the start of slip system, grain refinement, morphology and distribution of the phase, all of which would directly related to the material's mechanical properties [50][51][52][53]. Currently, the ECAP process is mainly applied on Mg alloy, and there are only a few researches on PMMCs processed by ECAP.…”

Section: Equal Channel Angular Pressingmentioning

confidence: 99%

Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

Deng

Wang

Nie

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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Particle reinforced magnesium matrix composite (PMMC) possesses the merits of high specific strength, high specific modulus, better dimensional stability, good wear resistance and lower production cost, which is thought as a promising material in the field of aerospace, automobile, electronic communication, etc. To eliminate the casting defect, the PMMC is usually experienced hot deformation process. The present paper mainly focuses on the deformation behavior of PMMCs. First, the development of PMMCs based on particle size is introduced. Then, the hot deformation technology and deformation mechanism of PMMCs at elevated temperature are given and analyzed, respectively. After reviewing the dynamic recrystallization and texture of PMMCs, its future development is suggested based on the current research progress.

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Section: Equal Channel Angular Pressingmentioning

confidence: 99%

Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

Deng

Wang

Nie

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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“…Researches on precipitation phenomena in Mg-TM-RE alloys have been mostly concentrated on nucleation, growth and distribution in the matrix for static precipitation [30][31][32] or during hot deformation process [33][34][35][36][37][38]. Specifically, dynamic precipitation of ́ precipitates has been reported by Hou et al [38] during hot compression of Mg-8Gd-2Y-1Nd-0.3Zn-0.6Zr alloy who observed similar orientation relationships under static or dynamic precipitation.…”

Section: Introductionmentioning

confidence: 94%

“…However, little data is available on the preferred alignment of precipitates. Analysis of the published literature indicates that precipitates are randomly distributed in the matrix [30][31][32][33][34][35][36][37][38]. In contrast, other authors report preferred alignment during the growth process [39][40][41][42].…”

Section: Introductionmentioning

confidence: 98%

Formation of precipitates in parallel arrays on LPSO structures during hot deformation of GZ41K magnesium alloy

Saadati

Khosroshahi

Ebrahimi

et al. 2017

Materials Characterization

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(Mg,Zn)3Gd precipitates were observed in the form of parallel arrays within a α-Mg matrix of a Mg-3.5Gd-1Zn-0.6Zr (GZ41K) alloy following isothermal holding at 450 ℃ for 20 min or uniaxial hot compression testing at 450 ℃ and at strain rates of 10-3 s-1 and 10-1 s-1. A microstructural analysis using a combination of scanning and transmission electron microscopies showed arrays of precipitates nucleated on stacking faults as a result of the LPSO structures decomposing statically after long isothermal holding times at 450 ℃, which is lower than the dissolution temperature of (Mg,Zn)3Gd precipitates (520 ℃), and dynamically, as a result of hot compression. The presence of precipitates on slip bands was also observed in the case of deformed specimens. The characteristics of the precipitates were investigated using differential thermal analysis, and optical and electron microscopy. The influences of the solutionizing temperature and deformation conditions on distribution, morphology and volume fraction of precipitates were quantified. The results are interpreted in terms of the influence of the strain rate in increasing the stacking fault/dislocation intersections and the decomposition of the L1 2 structure of stacking faults.

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Section: Introductionmentioning

confidence: 99%

“…In fact, the dynamic precipitation also can occur depending on the alloy composition and solid solution content, especially during hot deformation [21]. E. Dogan et al [21] found a new dynamic precipitate Φ in AZ31 alloy during different plastic deformation modes, and the precipitate primarily formed along the grain boundaries of the DRXed grains. Hou et al [11] found extensive dynamic precipitation in Mg-8Gd-2Y-1Nd-0.3Zn-0.6Zr alloy after hot compression at 350 • C and the strain rate of 0.5 s −1 , and they thought the formation of precipitate depended strongly on the stress field.…”

Section: Introductionmentioning

confidence: 99%

The Microstructures and Tensile Properties of As-Extruded Mg–4Sm–xZn–0.5Zr (x = 0, 1, 2, 3, 4 wt %) Alloys

Che

Cai

Cheng

et al. 2017

Metals

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Abstract:The microstructures and tensile properties of as-cast and as-extruded Mg-4Sm-xZn-0.5Zr (x = 0, 1, 2, 3, 4 wt %) alloys were systematically investigated by optical microscope, X-ray diffractometer (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). Numerous nanoscale dynamic precipitates could be observed in the as-extruded alloys containing high content of Zn, and the nanoscale particles were termed as (Mg,Zn) 3 Sm phase. Some basal disc-like precipitates were observed in as-extruded Mg-4Sm-4Zn-0.5Zr alloy, which were proposed to have a hexagonal structure with a = 0.556 nm. The dynamic precipitates effectively pinned the motions of DRXed (dynamic recrystallized) grain boundaries leading to an obvious reduction of DRXed grain size, and the tensile yield strength of as-extruded alloy was improved. The as-extruded Mg-4Sm-4Zn-0.5Zr alloy exhibits the best comprehensive mechanical properties at room temperature among all the alloys, and the yield strength, ultimate tensile strength and elongation are about 246 MPa, 273 MPa and 21% respectively.

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Dynamic precipitation in Mg-3Al-1Zn alloy during different plastic deformation modes

Cited by 67 publications

References 36 publications

Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

Formation of precipitates in parallel arrays on LPSO structures during hot deformation of GZ41K magnesium alloy

The Microstructures and Tensile Properties of As-Extruded Mg–4Sm–xZn–0.5Zr (x = 0, 1, 2, 3, 4 wt %) Alloys

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