Understanding the factors influencing yield strength on Mg alloys

Toda‐Caraballo, Isaac; Galindo-Nava, E.I.; Rivera-Dı́az-del-Castillo, P.E.J.

doi:10.1016/j.actamat.2014.04.064

Cited by 141 publications

(39 citation statements)

References 52 publications

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“…Other than its low density, magnesium based materials also exhibit high specific mechanical properties, excellent castability and machinability, high damping characteristics, high thermal stability, high thermal and electrical conductivity, and resistance to electromagnetic radiation [3][4][5][6][7]. However, the application areas of magnesium have been limited by its low corrosion resistance and relatively poor mechanical properties, such as low elastic modulus, low strength, limited room temperature ductility and toughness, rapid loss of strength with temperature, and poor creep resistance [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, a prominent heat-affected zone (HAZ) can be developed during the melting of the tracks. HAZ is developed as a result of partial melting of particles due to radial heat conduction from the centre of the molten pool to the neighbouring powders [8]. If the scanning speed was too fast, more powders, due to the low density and chemical activity of magnesium, were blown up and then oxidized to form a black fog MgO contaminating the protect-gas chamber [59].…”

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confidence: 99%

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Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Manakari

Parande

Gupta

2016

Metals

191

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Magnesium-based materials are used primarily in developing lightweight structures owing to their lower density. Further, being biocompatible they offer potential for use as bioresorbable materials for degradable bone replacement implants. The design and manufacture of complex shaped components made of magnesium with good quality are in high demand in the automotive, aerospace, and biomedical areas. Selective laser melting (SLM) is becoming a powerful additive manufacturing technology, enabling the manufacture of customized, complex metallic designs. This article reviews the recent progress in the SLM of magnesium based materials. Effects of SLM process parameters and powder properties on the processing and densification of the magnesium alloys are discussed in detail. The microstructure and metallurgical defects encountered in the SLM processed parts are described. Applications of SLM for potential biomedical applications in magnesium alloys are also addressed. Finally, the paper summarizes the findings from this review together with some proposed future challenges for advancing the knowledge in the SLM processing of magnesium alloy powders.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Manakari

Parande

Gupta

2016

Metals

191

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“…Recently, Toda-Caraballo et al 9,10,13 have proposed an extension of a classical SSS model for binary systems 4 to multicomponent systems, where the key parameters are the alloy's calculated unit cell parameter and its variation with composition. Curtin and co-workers 8 put forward a parameterfree and predictive SSS theory by approximating the multicomponent matrix as an effective medium having the average properties of the alloy and then calculated the solute-dislocation interaction energy from first principles for a multitude of configurations.…”

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confidence: 99%

“…The first models that attempted to quantify this effect were introduced about seven decades ago; 1-4 since then, many refinements have been proposed, continuing to the present. [5][6][7][8][9][10][11][12][13][14][15] Recently, complex solid solutions comprising multiple principal elements, often referred to as high-entropy alloys (HEAs), a name coined by Yeh et al [Ref. 16], have been receiving tremendous attention in the literature [e.g., Refs.…”

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confidence: 99%

Atomic displacement in the CrMnFeCoNi high-entropy alloy – A scaling factor to predict solid solution strengthening

et al. 2016

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Although metals strengthened by alloying have been used for millennia, models to quantify solid solution strengthening (SSS) were first proposed scarcely seventy years ago. Early models could predict the strengths of only simple alloys such as dilute binaries and not those of compositionally complex alloys because of the difficulty of calculating dislocation-solute interaction energies. Recently, models and theories of SSS have been proposed to tackle complex high-entropy alloys (HEAs). Here we show that the strength at 0 K of a prototypical HEA, CrMnFeCoNi, can be scaled and predicted using the root-mean-square atomic displacement, which can be deduced from X-ray diffraction and first-principles calculations as the isotropic atomic displacement parameter, that is, the average displacements of the constituent atoms from regular lattice positions. We show that our approach can be applied successfully to rationalize SSS in FeCoNi, MnFeCoNi, MnCoNi, MnFeNi, CrCoNi, CrFeCoNi, and CrMnCoNi, which are all medium-entropy subsets of the CrMnFeCoNi HEA.

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“…Experimental studies have produced a large amount of data relating grain size with various solute based parameters 27,30,[32][33][34][44][45][46][47][48][49][50][51][52][53] . It is fortunate that what is a complex relationship between grain size and alloy composition 36,38,54 can be in the first instance related to some simple parameters.…”

Section: Constitutional Supercooling and The Supercooling Parametmentioning

confidence: 99%

Grain Refinement of Al-Si Hypoeutectic Alloys by Al3Ti1B Master Alloy and Ultrasonic Treatment

Gui

Wang

Prasad

et al. 2016

Shape Casting: 6th International Symposium

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The concept of constitutional supercooling (CS) including the term itself was first described and discussed qualitatively by in order to understand the formation of cellular structures during the solidification of tin, and then quantified by Tiller, Jackson, Rutter, and Chalmers (1953). On that basis, Winegard and Chalmers (1954) further considered 'supercooling and dendritic freezing of alloys' where they described how CS promotes the heterogeneous nucleation of new crystals and the formation of an equiaxed zone. Since then the importance of CS in promoting the formation of equiaxed microstructures in both grain refined and unrefined alloys has been clearly revealed and quantified. This paper describes our current understanding of the role of CS in promoting nucleation and grain formation. It also highlights that CS, on the one hand, develops a nucleation-free zone surrounding each nucleated and growing grain and, on the other hand, protects this grain from readily remelting when temperature fluctuations occur due to convection. Further, due to the importance of the diffusion field that generates CS recent analytical models are evaluated and compared with a numerical model. A comprehensive description of the mechanisms affecting nucleation and grain formation and the prediction of grain size is presented with reference to the influence of the casting conditions applied during the practical casting of an alloy.

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Understanding the factors influencing yield strength on Mg alloys

Cited by 141 publications

References 52 publications

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Selective Laser Melting of Magnesium and Magnesium Alloy Powders: A Review

Atomic displacement in the CrMnFeCoNi high-entropy alloy – A scaling factor to predict solid solution strengthening

Grain Refinement of Al-Si Hypoeutectic Alloys by Al3Ti1B Master Alloy and Ultrasonic Treatment

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