Grain size and texture control of Mg–3Al–1Zn alloy sheet using a combination of equal-channel angular rolling and high-speed-ratio differential speed-rolling processes

Kim, Woo Jin; Yoo, S.J.; Chen, Z.H.; Jeong, Hyo‐Tae

doi:10.1016/j.scriptamat.2009.02.005

Cited by 63 publications

(21 citation statements)

References 9 publications

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“…Grain refinement is an effective way to harden Mg alloys without obvious compromise in plasticity [1][2][3][4][5][6]. Various effective methods have been developed to refine grains in Mg alloys, including equal channel angular extrusion (ECAE) [7], friction stir processing [8], multi-directional forging [9] and high pressure torsion [10].…”

Section: Introductionmentioning

confidence: 99%

Deformation behavior and mechanical properties of composite twin structures under different loading paths

Xin

Zhou

et al. 2015

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Deformation behavior and mechanical properties of composite twin structures under different loading paths

Xin

Zhou

et al. 2015

Materials Science and Engineering: A

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“…The effect of basal-texture anisotropy on the tensile properties of AZ31 alloy has been well discussed in Ref. [13]. Fig.…”

Section: Resultsmentioning

confidence: 92%

High-strength Mg–Al–Ca alloy with ultrafine grain size sensitive to strain rate

Kim

Lee

2011

Materials Science and Engineering: A

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“…The ratio of GBS strain to total strain was estimated to be near to 8%. Kim et al (2009) also observed deviations from the Hall-Petch relationship in Mg-Li alloy with a grain size of 1 µm and proposed the negative slope observed in the Hall-Petch plot is related to transition from pipe diffusion -controlled slip creep to grain boundary diffusion-controlled GBS. The critical grain size associated with abnormal Hall-Petch behavior is predicted to vary depending on the strain rate and diffusivity.…”

Section: Deformation Mechanism Of Spd-produced Ufg Mg Alloysmentioning

confidence: 95%

Bulk Ultrafine-grained Magnesium Alloys by SPD Processing：Technique, Microstructures and Properties

Ma¹,

Jiang²

2011

Magnesium Alloys - Design, Processing and Properties

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IntroductionMg alloys are very attractive as the lightest metallic structural materials and have great potential for applications in automotive, aerospace and electronic industries. However, their usages are still limited due to some undesirable properties of castings (such as strength, ductility, creep and corrosion resistance) and few fabricating methods besides conventional ingot metallurgy processing. Since grain refinement is generally believed to have beneficial effect on properties of Mg alloys, fabrication of bulk ultrafine-grained (UFG, grain size less than 1µm) alloys using the new conceptual metal forming process -severe-plasticdeformation (SPD) should attract considerable attention (Azushima et al., 2008). During the last decade, SPD processing has been evolving as a rapidly progressing direction of modern materials science that is aimed at developing materials with new mechanical and functional properties for advanced applications. As well known, all Mg alloys (except for some special Li-containing alloys) exhibit a hexagonal crystal structure, leading to severe limitations in their ductility, strength and creep resistance. This inherent difficulty maybe be reasonably overcame by some special processing of SPD, such as equal-channel angular pressing (ECAP), accumulative rolling bonding (ARB), high pressure torsion (HPT), etc. Enhanced properties have been obtained after these SPD processes in various Mg alloys. For example, ZK60 Mg alloy processed by ECAP (with the grain size to ~0.8µm) is superplastic at a testing temperature of 473K with an optimum ductility of ~1310% when using an initial strain rate of 2.0×10 -4 s -1 (Figueiredo et al., 2006). Mg-9Li-1Zn alloy had the greater increase in tensile strength of about 41.8MPa and the least decrease in elongation of about 25% at room temperature . UFG ZE41A alloy after enough ECAP passes obtains higher corrosion resistance besides superior mechanica l p r o p e r t i e s ( a b o u t 1 2 0 % h i g h e r i n y i e l d strength and 75% larger in elongation at room temperature after 32 passes) . SPD fabrication of bulk UFG Mg alloys is becoming one of the most actively developing areas in the field of advanced structural and functional Mg alloys. SPD-produced UFG materials are fully dense and their large geometric dimensions make them attractive for efficient practical applications. Today, SPD techniques are emerging from their domain of laboratory-scale research into commercial production of various UFG materials (Valiev et al., 2009). In this chapter, we will consider these new trends in SPD processing used to produce bulk UFG Mg alloys and highlight some key results on the development of the www.intechopen.com Magnesium Alloys -Design, Processing and Properties 188 UFG alloys science and applications. The aim is to better understand the relationships between microstructure and properties of SPD materials, and exploit novel SPD processing routes for fabricating UFG Mg alloy with enhanced properties. Developing SPD techniques for grain refinementSPD proce...

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Grain size and texture control of Mg–3Al–1Zn alloy sheet using a combination of equal-channel angular rolling and high-speed-ratio differential speed-rolling processes

Cited by 63 publications

References 9 publications

Deformation behavior and mechanical properties of composite twin structures under different loading paths

Deformation behavior and mechanical properties of composite twin structures under different loading paths

High-strength Mg–Al–Ca alloy with ultrafine grain size sensitive to strain rate

Bulk Ultrafine-grained Magnesium Alloys by SPD Processing：Technique, Microstructures and Properties

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