Texture development and its effect on mechanical properties of an AZ61 Mg alloy fabricated by equal channel angular pressing

Kim, W.J; Hong, Sun Ig; Kim, Y.S; Min, Shuyuan; Jeong, Hyo‐Tae; Lee, J.D

doi:10.1016/s1359-6454(03)00161-7

Cited by 524 publications

(253 citation statements)

References 16 publications

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“…ED == h10-10i fiber texture. 26) When the magnesium alloys were ECAEed at temperature of higher than 573 K, according to the study of Yoshida et al, 27) a preferred orientation with most basal planes parallel to the ED was also formed after a few pass numbers. A similar texture should be formed in present alloys.…”

Section: Discussionmentioning

confidence: 99%

“…However, when the grain refinement gradually increased with the ECAE number increasing, some (0001) basal planes also maybe gradually switch to be parallel to the shear plane during ECAE deformation, with about 45 inclined to the extrusion direction. 26) This texture is a softening orientation, which results in the strength lowered and ductility heightened. 26,28) Therefore, as the pass number increases, grain refinement gives rise to the improvement in the strength and elongation, and texture softening led to increasing in the elongation while decreasing in strength.…”

Section: Discussionmentioning

confidence: 99%

“…26) This texture is a softening orientation, which results in the strength lowered and ductility heightened. 26,28) Therefore, as the pass number increases, grain refinement gives rise to the improvement in the strength and elongation, and texture softening led to increasing in the elongation while decreasing in strength. When more than two ECAE passes were processed, the continuously improved strength and ductility in the assolutionized alloys are attributed to the combined effects of the grain refinement strengthening, secondary phase strengthening and developed preferred orientation (texture).…”

Section: Discussionmentioning

confidence: 99%

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Effect of Solution Treatment on Microstructure Evolution and Mechanical Properties of Mg-6.0Zn-0.6Y-0.5Zr Alloy Processed by Equal Channel Angular Extrusion

2008

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The effect of solution treatment before equal channel angular extrusion (ECAE) on the evolution of microstructures and mechanical properties in as-cast Mg-6.0Zn-0.6Y-0.5Zr alloy after different ECAE passes has been systematically investigated. The micrographs and tensile results showed that the solution treatment significantly influenced the microstructural evolution, as well as tensile strength and elongation. ECAE processing results in producing finer grain structure both in the as-cast and as-solutionized alloys when the passes increased. However, solution treatment before ECAE provides a significant increase in forming rate of fine recrystallized grains during ECAE at high temperature of 623 K. A fully recrystallized microstructure was observed after 8 passes in the as-solutionized alloy, while it was not finished even after 8 passes in the as-cast alloy. The ductility of as-solutionized alloy is always significantly better than those of the as-cast alloy. However, the strengths of the former are better than those of the later only after the passes beyond 6 passes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effect of Solution Treatment on Microstructure Evolution and Mechanical Properties of Mg-6.0Zn-0.6Y-0.5Zr Alloy Processed by Equal Channel Angular Extrusion

2008

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“…This is because besides the grain size, the mechanical properties can also be possibly influenced by the crystallographic texture. 25,26) Previous studies have suggested that most of the basal planes are inclined to be 45 from the extrusion direction along the shear plane below processing temperature of 523 K while tend to be parallel to the extrusion direction above 573 K. 27) This formation of 45 angle below 523 K causes the basal planes to slip easier due to the maximum imposed shear force, which as a result, retards the increase of strength originated from the largely decreased grain size at 523 K. 28) Further, by comparing our data with available reports, we found that our yield stress of 192 MPa at 523 K is larger than that of 160 MPa 29) and 130 MPa 30) obtained by 6 repetitive ECAEs, and that of 160 Mpa 24) by the hot extrusion. Additionally, the UCS of 386 MPa and compressive ratio of 14.4% at 523 K are also comparable to corresponding values of 370 MPa and 15% for the hot-extruded AZ31.…”

Section: )mentioning

confidence: 99%

Change-Channel Angular Extrusion of Magnesium Alloy AZ31

Liu

et al. 2009

Mater. Trans.

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We report microstructure evolution and mechanical properties of Mg alloy AZ31 processed by a new severe plastic deformation technique, the change-channel angular extrusion (CCAE). Under all of the processing temperatures ranging from 523 to 723 K, grains of the extruded Mg alloys are found to be refined significantly, which is attributed to the grain subdivision and dynamic recrystallization induced by the drastic deformation. We have also found that lowering processing temperature is a relevant factor in yielding finer grain, which as a consequence, gives rise to higher micro-hardness, larger yield and ultimate compressive strength, and more enhanced compressive ratio. The improved mechanical properties of the AZ31 alloys deformed by the CCAE are comparable or even superior to those of the alloys subjected to the equal-channel angular extrusion with several passes, rendering the CCAE an effective and promising approach to impose drastic plastic deformation for further enhancing workability of Mg alloys.

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“…Because of their limited slip systems, they are relatively difficult to form mechanically at room temperature, which makes their use in practical applications very challenging. In order to improve the dynamic strength and ductility of magnesium and magnesium alloys, severe plastic deformation (SPD) processing techniques, such as equal-channel angular extrusion (ECAE) [1][2][3] and grain refining techniques, such as spinning water atomization process (SWAP) [4] are being employed. The resulting grain size from ECAE and SWAP processes typically ranges from 2-to-5 μm.…”

Section: Introductionmentioning

confidence: 99%

Microstructural effects on the spall properties of ECAE and SWAP magnesium alloys: AZ31B-4E and AMX602

Williams¹,

Farbaniec²,

Kecskes³

et al. 2017

AIP Conference Proceedings

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Abstract. The effects of microstructure on the spall properties of two magnesium alloys fabricated via Equal-Channel Angular Extrusion (ECAE) and Spinning Water Atomization Process (SWAP) were investigated. The Hugoniot Elastic Limit (HEL) for both AZ31B-4E and AMX602 magnesium alloys were found to be approximately 0.181±0.003 GPa and 0.187±0.012 GPa, respectively. The spall strengths extracted from the free surface velocity profiles were found to decrease by approximately 4% for AZ31B-4E between 1.7 GPa to 4.6 GPa shock stress. Although this reduction in spall strength may lie within the experimental error, the microstructure of the post-shocked magnesium alloy show that manganese intermetallic inclusions in the AZ31B-4E magnesium were perhaps responsible for the reduction in spall strength as a function of shock stress. On the contrary, the spall strength for AMX602 was found to be random for the same shock stress range studied. This random behavior of the AMX602 was likely due to the incomplete sintering during mechanical processing. The fracture surfaces of both materials were dominated by nanovoids and the AMX602 fracture surface was found to be striated. A more in-depth study is needed to better understand the spall behavior of both materials.

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Texture development and its effect on mechanical properties of an AZ61 Mg alloy fabricated by equal channel angular pressing

Cited by 524 publications

References 16 publications

Effect of Solution Treatment on Microstructure Evolution and Mechanical Properties of Mg-6.0Zn-0.6Y-0.5Zr Alloy Processed by Equal Channel Angular Extrusion

Effect of Solution Treatment on Microstructure Evolution and Mechanical Properties of Mg-6.0Zn-0.6Y-0.5Zr Alloy Processed by Equal Channel Angular Extrusion

Change-Channel Angular Extrusion of Magnesium Alloy AZ31

Microstructural effects on the spall properties of ECAE and SWAP magnesium alloys: AZ31B-4E and AMX602

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