Exceptionally high strength in Mg–3Al–1Zn alloy processed by high-ratio differential speed rolling

Kim, Woo Jin; Lee, Y.G.; Lee, M.J.; Wang, J.Y.; Park, Y.B.

doi:10.1016/j.scriptamat.2011.09.029

Cited by 64 publications

(27 citation statements)

References 14 publications

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“…Recently, Kim et al [17,18] reported an exceptionally strong AZ31 alloy produced by high-ratio differential speed rolling that resulted in an ultrafine-grained structure (average grain size of 0.6 µm) giving a yield stress of 382 MPa. Razavia et al [15] reported that the grain size of AZ31 produced by ECAP could be reduced to 350 nm, giving an alloy with a yield strength of 385 MPa and ultimate tensile strength of 455 MPa with 13% ductility, which is the highest reported combined strength and ductility for an AZ31 alloy.…”

Section: Introductionmentioning

confidence: 99%

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

Guan

Rainforth

Sharp

et al. 2016

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

Guan

Rainforth

Sharp

et al. 2016

Journal of Alloys and Compounds

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“…However, these alloys exhibit relatively low strength and poor plasticity at room temperature. The yield strength, tensile strength, and plasticity of magnesium alloys are adversely affected by increasing grain size [1,2]. Therefore, controlling grain size is one of major goals for microstructural design of magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Effects of Al2O3 Particles on Grain Growth of AZ31 Magnesium Alloy at Elevated Temperatures by Phase Field Simulation

He¹,

Jin²,

Zong³

2017

dtmse

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Abstract. We established a phase-field model to simulate the refinement effect of Al 2 O 3 particles on the grain growth of AZ31 magnesium alloy at elevated temperatures during equal channel angular pressing (ECAP) process in realistic spatio-temporal scale. Simulations were performed to study the influences of fraction of Al 2 O 3 particles and processing temperature ranging from 250°C. to 350°C. during ECAP. The simulation results agreed well with the limited existing experimental data for the ECAPed AZ31 alloy to prove the success of the model. The results showed that when the fraction of Al 2 O 3 particles was larger, the grain size of the sample was smaller during ECAP. For instance, the grain size was reduced by 28.7% with the addition of 4 wt.% Al 2 O 3 particles, compared with that of the alloy without the particles at 250°C. However, if the particle fraction is greater than 4 wt.%, further particle addition will have less effect. Moreover, it was also found that grain size owing to the Al 2 O 3 addition decreased more significantly with processing temperature. For example, when the addition of Al 2 O 3 particles was 2 wt.%, the grain size was reduced by 2.96µm at 250°C, 3.60µm at 300°C, and 5.19µm at 350°C, respectively; in contrast with that of the alloy without the particles.

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“…Kim et al [31][32][33] have recently demonstrated that highratio differential speed rolling can reduce grain size down to sub-micrometer size in metals [31][32][33], and subsequently also in metal-matrix composites [34][35][36]. In particular, Kim et al [31] used high-ratio differential speed rolling to produce high strength in the Mg alloy AZ31, achieving a yield strength of 380 MPa, a tensile strength of 410 MPa, and an elongation to fracture of 7%, for material having a grain size of 0.6 μm.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Kim et al [31] used high-ratio differential speed rolling to produce high strength in the Mg alloy AZ31, achieving a yield strength of 380 MPa, a tensile strength of 410 MPa, and an elongation to fracture of 7%, for material having a grain size of 0.6 μm.…”

Section: Introductionmentioning

confidence: 99%

“…The sheet thickness was 0.70 mm for DR473wq and DR423wq, and was 0.65 mm for DR473ac. Table 1 also gives the resultant grain size and mechanical properties from Kim et al [31] and the corresponding designations used by Kim et al [31]. DR423wq had a yield strength and a tensile strength significantly higher than that of the as-received AZ31ar, with an elongation to fracture of 7%.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stress corrosion cracking of high-strength AZ31 processed by high-ratio differential speed rolling

Shi

Kim

Cao

et al. 2015

Journal of Magnesium and Alloys

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Stress corrosion cracking (SCC) in distilled water was studied for AZ31, processed by differential-speed-rolling to different strengths, using Linear Increasing Stress Tests (LISTs). The stress corrosion crack velocity was 5.0 ± 2.5 × 10 −9 m s −1 , independent of applied stress rate and independent of material strength. SCC susceptibility was greater at lower applied stress rates manifest most importantly as a lower threshold stress for stress corrosion crack initiation. SCC susceptibility could be characterised by the ratio of threshold stress to yield stress, which was dependent on processing details and was as low as 0.3.

show abstract

Exceptionally high strength in Mg–3Al–1Zn alloy processed by high-ratio differential speed rolling

Cited by 64 publications

References 14 publications

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

On the use of cryomilling and spark plasma sintering to achieve high strength in a magnesium alloy

Effects of Al2O3 Particles on Grain Growth of AZ31 Magnesium Alloy at Elevated Temperatures by Phase Field Simulation

Stress corrosion cracking of high-strength AZ31 processed by high-ratio differential speed rolling

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