Double extrusion of Mg-Al-Zn alloys

Lu, Liwei; Liu, Chuming; Yin, Zehao; Zhao, Jun; Gan, Lu; Wang, Zhongchang

doi:10.1007/s00170-016-9146-7

Cited by 7 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 shows the {0002} and {1010} pole figures of the DEBS-ed sheets at different temperatures, exhibiting a typical {0002} fiber texture after the DEBS process. However, in comparison with the conventional extrusion (17.55) 17 , the texture intensity of the DEBS-ed sheets is significantly weakened (Figures 4a and 4b) and the texture component becomes more dispersive along the ED, which can induce a good deformation capability due to the <1120> direction in fewer grains orientated parallel to the ED.…”

Section: Microstructurementioning

confidence: 94%

Improving the microstructure and mechanical properties of magnesium-alloy sheets with a new extrusion method

Lu¹,

Yin²,

Liu³

et al. 2017

Mater. Tehnol.

View full text Add to dashboard Cite

A new effective extrusion technique, including integrated direct extrusion and bending-shear deformation, was proposed to fabricate AZ31-magnesium-alloy sheets with high performance, and the grain refinement, texture and mechanical properties were further investigated. The results show that the new extrusion technique can noticeably refine the grain size from 240 μm to 3.2 μm at 563 K, and the basal texture is also dramatically weakened, which can be attributed to a fully dynamic recrystallization triggered by a large shearing strain accumulated due to a bar-sheet deformation and continuous bending-shear deformation. Consequently, the ductility significantly increases from 11.67 % to 27.7 %, and the ultimate tensile stress can still keep a high value of 290 MPa, rendering this new technique an effective processing method for further tailoring of the microstructure and properties of Mg-based alloys for a wide range of engineering applications. Keywords: AZ31-Mg alloy, hot extrusion, microstructure, mechanical properties Avtorji prispevka so raziskovali vpliv nove u~inkovite tehnike iztiskavanja (ekstrudiranja) na lastnosti plo~evine iz Mg zlitine AZ31. Pri tej tehniki sta zdru`ena postopka direktnega iztiskanja in upogibanja s stri`no deformacijo (angl.: Direct Extrusion and Bending Shear; DEBS). Avtorji ugotavljajo, da je pri{lo do udrobljenja mikrostrukture, raziskali pa so tudi teksturo in dolo~ili mehanske lastnosti tako izdelane plo~evine. Rezultati raziskave so pokazali, da je nova tehnika ekstrudiranja opazno zmanj{ala velikost kristalnih zrn iz 240 μm na 3,2 μm pri 563 K (290°C), prav tako je ob~utno oslabela bazala tekstura, kar je pripisati popolni dinami~ni rekristalizaciji zaradi velike stri`ne deformacije nakopi~ene med preoblikovanjem okroglice v plo~evino in neprekinjene upogibno-stri`ne deformacije. Posledi~no se je ob~utno povi{ala duktilnost iz 11, 67 % na 27, 7 % in natezna trdnost je {e vedno ostala na visokem nivoju 290 MPa. Zato ta nova tehnika iztiskavanja lahko postane u~inkovita procesna tehnologija za nadaljnje prilagajanje mikrostrukture in lastnosti Mg zlitin {iroki paleti in`enirskih aplikacij. Klju~ne besede: AZ31 magnezijeva zlitina, vro~e ekstrudiranje, mikrostruktura, mehanske lastnosti

show abstract

Section: Microstructurementioning

confidence: 94%

Improving the microstructure and mechanical properties of magnesium-alloy sheets with a new extrusion method

Lu¹,

Yin²,

Liu³

et al. 2017

Mater. Tehnol.

View full text Add to dashboard Cite

show abstract

“…However, the results obtained by previous studies reveal that the poor formability and narrow processing temperature range of high strength rare earth magnesium alloys severely restrict their application and promotion [15]. However, with the aid of material physical models and processing maps, the formability of high strength rare earth magnesium alloys can be predicted and the optimal technological parameters can be obtained to replace the traditional trial and error method, which provides a reliable guarantee for the accurate control of product quality [16,17].…”

Section: Introductionmentioning

confidence: 99%

3D Processing Maps of Cast Mg‐9Gd‐3Y Alloy and Numerical‐Experimental Verification

Luo

2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The hot compression behavior of Mg-9Gd-3Y (GW93) alloy was investigated by carrying out isothermal compression tests at the deformation temperature range of 300–450°C and strain rate range of 0.001–1s−1. Considering the influence of the strain on the formability of the GW93 alloy, three-dimensional (3D) processing maps were established based on the dynamic material model. The 3D processing maps indicate that the formability of the material improved with the decrease of the strain rate and the increase of the heating temperature, and the material at lower heating temperature mostly underwent flow instability. The formable processing region of the hot deformation of the GW93 alloy was concentrated within the temperature range of 380–450°C and the strain rate range of 0.001–0.01 s−1. Subsequently, the 3D processing maps were embedded into the finite element (FE) software DEFORM-3D by means of user subroutines, and the formability of GW93 alloy during the isothermal plane strain forging process was predicted. The FE simulation results revealed that the formability of the material at low strain rate improved compared with that at high strain rate under the same temperature. Finally, an isothermal plane strain forging technological experiment was carried out, and the microstructure of the formed sample was analyzed. The experimental result is in good agreement with that of the numerical simulation. Combined with microstructural observation, the accuracy of the simulation results and the 3D processing maps of the GW93 alloy was verified.

show abstract

Effect of Ca additions on evolved microstructures and subsequent mechanical properties of a cast and hot-extruded Mg–Zn–Zr magnesium alloy

Moradnezhad

Razaghian

Taghiabadi

et al. 2019

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Double extrusion of Mg-Al-Zn alloys

Cited by 7 publications

References 25 publications

Improving the microstructure and mechanical properties of magnesium-alloy sheets with a new extrusion method

Improving the microstructure and mechanical properties of magnesium-alloy sheets with a new extrusion method

3D Processing Maps of Cast Mg‐9Gd‐3Y Alloy and Numerical‐Experimental Verification

Effect of Ca additions on evolved microstructures and subsequent mechanical properties of a cast and hot-extruded Mg–Zn–Zr magnesium alloy

Contact Info

Product

Resources

About