An investigation of second phases in as-cast AZ31 magnesium alloys with different Sr contents

Lü, Weijie; Pan, Fusheng; Yang, Ming‐Bo; Cheng, Renju

doi:10.1007/s10853-013-7339-0

Cited by 15 publications

(9 citation statements)

References 26 publications

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“…In addition, there is another phase in bright white with the ratio of Al:Mg: Sr of about 81:7:12. This phase might be (Al, Mg) 17 Sr 2 . The relative volume fraction of the Sr‐rich particles is expected to increase with Sr content, and the size of the phase also grows when Sr content increases (While the apparent length and width of the rod‐like particles in 3# alloys and the strip‐like particles in 5# alloys varied from 6.0 to 24.0 μm and 1.6 to 2.0 μm, respectively (see Figure a,b).…”

Section: Resultsmentioning

confidence: 98%

Mechanical properties, corrosion behavior, and microstructure of Sr modified Al–9.2Mg–0.7Mn alloys

Zhang

Xia

Yan

et al. 2019

Materials & Corrosion

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The influence of strontium (Sr) additions in the form of Mg-Sr master alloys from 0 to 0.6 wt% on the mechanical properties, corrosive nature, and microstructure of Al-9.2Mg-0.7Mn alloys is investigated. The material is studied in a fully annealed (O-temper) and a sensitizing treatment at 150°C for 7 days. Here we demonstrate that there will be a new phase which might be (Al, Mg) 17 Sr 2 formed in the as-cast microstructure. When the Sr content is 0.2 wt%, under the premise that the mechanical properties of completely annealed alloy change little (relative to the matrix: the ultimate tensile strength increases by 8 MPa and the elongation only decrease by 1.6%), the intergranular corrosion resistance is significantly improved. The specific performance is that the mass loss from intergranular corrosion decreases by more than 53% from the addition of 0.2 wt% Sr after sensitizing. K E Y W O R D SAl-Mg alloys, intergranular corrosion, mechanical properties, Sr additions

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Section: Resultsmentioning

confidence: 98%

Mechanical properties, corrosion behavior, and microstructure of Sr modified Al–9.2Mg–0.7Mn alloys

Zhang

Xia

Yan

et al. 2019

Materials & Corrosion

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“…Ghaderi and Barnett 25 have claimed that the total twin volume fraction in magnesium alloy is determined largely by strain if twinning dominated deformation. Therefore, twins make the following contribution via their characteristic shear s to the macroscopic strain 26 e~msV t (1) where e is the macroscopic strain, m is the twin Schmid factor and V t is the twin volume fraction. For magnesium alloy AZ31, s is equal to y0?131.…”

Section: Microstructure and Texture Evolution During Precompressionmentioning

confidence: 99%

“…Magnesium and its alloys have attracted much attention in the past decades because of their low density (for pure magnesium, r51?74 g cm 23 ) and potential application as light weight structural materials. [1][2][3][4] However, the applications of these alloys are still restricted because they exhibit many drawbacks such as poor formability, strong levels of anisotropy and yield asymmetry between tension and compression. 5,6 For magnesium and its alloys, twinning is very important during plastic deformation because they do not have enough slip systems to accommodate plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Roles of detwinning in strain hardening and ultimate elongation in extruded Mg–3Al–1Zn alloy

Liu

Chen

et al. 2014

Materials Science and Technology

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For extruded magnesium alloy, prior compression along extrusion direction has great influences in the flow stress during subsequent tension. Detwinning plays an important role for these influences. In the present study, the effects of different prestrains on strain hardening behaviour during subsequent tension were examined in an extruded magnesium alloy AZ31. The results showed that the existence of detwinning decreased the tensile yield stress. Samples with different prestrains exhibited different strain hardening behaviour during subsequent tension. The reorientation due to detwinning had a great effect on strain hardening during tension. In addition, the effect of detwinning on ultimate elongation was investigated. The results showed that the sample with higher prestrain always has higher ultimate elongation due to the contribution of detwinning on macroscopic strain.

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“…With respect to the newly emerged peak in 0.2 Sr alloy ( Fig. 1(b)), according to [15], it is predicated to be the formation of Al 4 Sr phase. The following reactions are related:…”

Section: Microstructure Of As-cast Alloymentioning

confidence: 97%

“…Strontium was reported to reduce grain size and texture anisotropy in wrought Mg alloys [12], as well as to improve their creep resistance [13,14]. However, the most investigations about the alloys modified by Sr are based on Mg-Al system [15], such as MgAl-RE alloy [16,17]and Mg-Mn alloy [18][19][20]. Wang et al reported [21] that Sr can refine the second phases of Mg-3Al-1Si-0.3Mn efficiently.…”

Section: Introductionmentioning

confidence: 99%

The influences of Sr on the microstructure and mechanical properties of Mg-5Zn-2Al alloy

Chen

Gao

Song

et al. 2016

Materials Science and Engineering: A

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An investigation of second phases in as-cast AZ31 magnesium alloys with different Sr contents

Cited by 15 publications

References 26 publications

Mechanical properties, corrosion behavior, and microstructure of Sr modified Al–9.2Mg–0.7Mn alloys

Mechanical properties, corrosion behavior, and microstructure of Sr modified Al–9.2Mg–0.7Mn alloys

Roles of detwinning in strain hardening and ultimate elongation in extruded Mg–3Al–1Zn alloy

The influences of Sr on the microstructure and mechanical properties of Mg-5Zn-2Al alloy

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