Effect of pre-straining on twinning, texture and mechanical behavior of magnesium alloys A-review

Malik, Abdul; Wang, Yangwei; Nazeer, Faisal; Khan, Muhammad Abubaker; Ali, Tayyeb; Ain, Qura Tul

doi:10.1016/j.jmrt.2020.10.023

Cited by 55 publications

(10 citation statements)

References 107 publications

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“…In our previous review article [14], it was summarized that the pre-strain level increased the yield strength (YS) of the Mg alloys; therefore, the strain up to 0.1 led to a remarkable increase in the YS of the ZK-based Mg alloy. The texture -c axes ND ⊥ and the loading along with the ND led to the sigmoidal shape curve, which is the signature of twinning-induced deformation; however, the sigmoidal shape curve correlates with the twinning and de-twinning phenomenon [35,[38][39][40][41].…”

Section: Proposed Solution and Anticipated Deformation Mechanismmentioning

confidence: 99%

“…The mechanical strength of Mg alloys without rare-earth elements is roughly <400 MPa under tensile or compressive loading [8,[10][11][12][13]. In addition, the hardness of the material is roughly <90 HV [14,15]. It is believed that the mechanical strength with a large elongation to fracture can absorb energy in the radial direction and the bottom of the crater; contrarily the high hardness controls the depth of penetration (DOP).…”

Section: Introductionmentioning

confidence: 99%

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A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Malik

Nazeer

Wang

2022

Metals

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The ballistic impact resistance of lightweight magnesium alloys is an eye-catching material for the military and aerospace industries, which can decrease the cost of a project and the fuel consumption. The shockwave mitigation ability of a magnesium alloy is 100 times stronger than an aluminum alloy; nonetheless, ballistic impact resistance has still not been achieved against blunt and API projectiles. The major obstacles are the low hardness, low mechanical strength, basal texture and strain hardening ability under loading along the normal direction of the sheet. The high yield strength and ultimate strength can be achieved for a specific loading condition (tensile or compression) by adjusting the texture in magnesium alloys. The projectile impact along the normal direction in a strong basal-textured magnesium alloy can only produce a slip-induced deformation or minor twinning activity. Here, we propose a practical technique that can be valuable for altering the texture from c-axes//ND to c-axes//ED or TD, and can produce high strain hardening and high strength through a twinning and de-twinning activity. Subsequently, it can improve the ballistic impact resistance of magnesium alloys. The effect of the technique on the evolution of the microstructure and possible anticipated deformation mechanisms after ballistic impact is proposed and discussed.

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Section: Proposed Solution and Anticipated Deformation Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Malik

Nazeer

Wang

2022

Metals

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“…Introducing {10-12} <10-11> tension twin lamellas in the microstructure of Mg alloys has been suggested to be a simple yet very effective approach to enhance the RT strength and formability of Mg alloys [3]. Moreover, twinning can alter the texture by the reorientation of numerous grains by 86 o to the parent grain due to the stress energy and changes the crystal orientation.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, twinning can alter the texture by the reorientation of numerous grains by 86 o to the parent grain due to the stress energy and changes the crystal orientation. {10-12} <10-11> tension twins can be operated at the early stages of deformation due to low CRSS (2)(3)(4)(5). Previous studies have revealed that the twinning activity is strongly dependent on the loading direction, deformation temperature, strain rate, total strain and initial characteristics of the material (grain size, texture, second phase particle) [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-twinning on microstructure and texture evolution in room and cryogenically deformed Mg-0.5Ca alloy

Chaudry

Noh

Han

et al. 2022

J. Phys.: Conf. Ser.

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Introducing {10-12} tension twin lamellas has proved to be the most effective strategy to enhance the performance of Mg alloys. Twins can provide the preferential nucleation sites for recrystallization, hence twinning induced grain refinement can result in higher strength material based on Hall-Petch Effect. In addition, twinning can also modify the crystallographic c-axis distribution in wrought Mg alloys resulting in lower plastic anisotropy. Accordingly, in the present work, the twinning evolution in the Mg-0.5Ca (wt.%) alloy at room and cryogenic temperature was critically investigated. The samples were subjected to pre-compression (5%) at room temperature and -150 °C at the strain rate of 10-3 s-1. The microstructural and textural characterization was carried out using OM, SEM and EBSD to emphasize the twinning evolution during compression at room and low temperatures. The local lattice distortion and the localized deformation in terms of Kernel average misorientation (KAM) was also studied. The results revealed the significant grain refinement (13.7 μm 5.61 μm and 6.02 μm of uncompressed and RT, - 150 °C pre-compressed, respectively), where slightly enhanced twinning fraction in the sample compressed at RT was observed. Finally, remarkable increase in the yield strength was noticed in the pre-twinned samples, which was attributed to the twinning-induced grain refinement based on the Hall-Petch relationship.

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“…Magnesium (Mg) alloys are prospective lightweight (density~1.78 g/cm 3 ) materials and possess a high strength-to-weight ratio and high machinability [1][2][3]. However, these alloys are comprised of hexagonal close packed (HCP) crystal structures and have an inadequate c/a ratio [4][5][6][7][8][9][10]. The complex shape component of thermomechanical-processed wrought alloys cannot be designed due to very complex deformation (different mode of twinning, twinning variants, twinning morphology and twinning types [11]) and limited-slip activity under ambient temperature loading.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

Malik

Chaudry

Hamad

et al. 2021

Metals

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In this study, an overview of microstructure features such as grain size, grain structure, texture and its impact on strain rate sensitivity, strain hardening index, activation energy and thermal stability for achieving superplasticity of Mg alloys are presented. The deformation behavior under different strain rates and temperatures was also elaborated. For high elongation to fracture grain boundary sliding, grain boundary diffusion is the dominant deformation mechanism. In contrast, for low-temperature and high strain rate superplasticity, grain boundary sliding and solute drag creep mechanism or viscous glide dislocation followed by GBS are the dominant deformations. In addition, the results of different studies were compared, and optimal strain rate and temperature were diagnosed for achieving excellent high strain rate superplasticity.

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Effect of pre-straining on twinning, texture and mechanical behavior of magnesium alloys A-review

Cited by 55 publications

References 107 publications

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Effect of pre-twinning on microstructure and texture evolution in room and cryogenically deformed Mg-0.5Ca alloy

Microstructure Features and Superplasticity of Extruded, Rolled and SPD-Processed Magnesium Alloys: A Short Review

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