Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering

Y. Galindez, E. Correa, A. A. Zuleta, A. Valencia-Escobar, D. Calderon, L. Toro, P. Chacón, F. Echeverría E

Resultado de la investigación: Contribución a una revistaArtículo

Resumen

Abstract: Powders of commercially pure magnesium (c.p. Mg), AZ91 magnesium alloy and zinc were milled using a high-energy mill. The effect of high energy milling (HEM) on powders morphology, chemical composition, crystallite size and compaction of different powders mixtures were studied. After compaction, samples were thermally treated at 450 °C and both density and hardness were evaluated. It was found that as milling speed and time increases, the AZ91 alloy and c.p. Mg particles were deformed and fractured up to sizes below 10 μm. X-ray diffraction patterns for both the c.p. Mg and the AZ91 powders revealed that the milling process induced changes in both the α-Mg and the β-Mg17Al12 phases. By increasing the milling speed, the crystallite size decreases by up to 70% for AZ91 powders and by 80% for magnesium powders. The relative densities of the compacted AZ samples were greater than 85% and this parameter increased for all samples after thermal treatment at 450 °C, obtaining densities higher than 88%. Hardness measurements disclosed values as high as 84.3 HR15T. Theoretical calculations of mechanical strength were obtained for all samples based on the hardness values measured, finding very encouraging results for the three Mg alloys. Graphic Abstract: [Figure not available: see fulltext.].

Idioma originalInglés
PublicaciónMetals and Materials International
DOI
EstadoAceptada/en prensa - 1 ene 2019

Huella dactilar

Mechanical alloying
magnesium alloys
Magnesium alloys
Powders
sintering
Sintering
magnesium
Magnesium
Hardness
Crystallite size
hardness
Compaction
Magnesium powder
energy
Diffraction patterns
Strength of materials
Zinc
Heat treatment
chemical composition
diffraction patterns

Citar esto

Galindez, Y., Correa, E., Zuleta, A. A., Valencia-Escobar, A., Calderon, D., Toro, L., ... Echeverría E, F. (Aceptado/En prensa). Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering. Metals and Materials International. https://doi.org/10.1007/s12540-019-00490-1
Galindez, Y. ; Correa, E. ; Zuleta, A. A. ; Valencia-Escobar, A. ; Calderon, D. ; Toro, L. ; Chacón, P. ; Echeverría E, F. / Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering. En: Metals and Materials International. 2019.
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abstract = "Abstract: Powders of commercially pure magnesium (c.p. Mg), AZ91 magnesium alloy and zinc were milled using a high-energy mill. The effect of high energy milling (HEM) on powders morphology, chemical composition, crystallite size and compaction of different powders mixtures were studied. After compaction, samples were thermally treated at 450 °C and both density and hardness were evaluated. It was found that as milling speed and time increases, the AZ91 alloy and c.p. Mg particles were deformed and fractured up to sizes below 10 μm. X-ray diffraction patterns for both the c.p. Mg and the AZ91 powders revealed that the milling process induced changes in both the α-Mg and the β-Mg17Al12 phases. By increasing the milling speed, the crystallite size decreases by up to 70{\%} for AZ91 powders and by 80{\%} for magnesium powders. The relative densities of the compacted AZ samples were greater than 85{\%} and this parameter increased for all samples after thermal treatment at 450 °C, obtaining densities higher than 88{\%}. Hardness measurements disclosed values as high as 84.3 HR15T. Theoretical calculations of mechanical strength were obtained for all samples based on the hardness values measured, finding very encouraging results for the three Mg alloys. Graphic Abstract: [Figure not available: see fulltext.].",
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Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering. / Galindez, Y.; Correa, E.; Zuleta, A. A.; Valencia-Escobar, A.; Calderon, D.; Toro, L.; Chacón, P.; Echeverría E, F.

En: Metals and Materials International, 01.01.2019.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering

AU - Galindez, Y.

AU - Correa, E.

AU - Zuleta, A. A.

AU - Valencia-Escobar, A.

AU - Calderon, D.

AU - Toro, L.

AU - Chacón, P.

AU - Echeverría E, F.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Abstract: Powders of commercially pure magnesium (c.p. Mg), AZ91 magnesium alloy and zinc were milled using a high-energy mill. The effect of high energy milling (HEM) on powders morphology, chemical composition, crystallite size and compaction of different powders mixtures were studied. After compaction, samples were thermally treated at 450 °C and both density and hardness were evaluated. It was found that as milling speed and time increases, the AZ91 alloy and c.p. Mg particles were deformed and fractured up to sizes below 10 μm. X-ray diffraction patterns for both the c.p. Mg and the AZ91 powders revealed that the milling process induced changes in both the α-Mg and the β-Mg17Al12 phases. By increasing the milling speed, the crystallite size decreases by up to 70% for AZ91 powders and by 80% for magnesium powders. The relative densities of the compacted AZ samples were greater than 85% and this parameter increased for all samples after thermal treatment at 450 °C, obtaining densities higher than 88%. Hardness measurements disclosed values as high as 84.3 HR15T. Theoretical calculations of mechanical strength were obtained for all samples based on the hardness values measured, finding very encouraging results for the three Mg alloys. Graphic Abstract: [Figure not available: see fulltext.].

AB - Abstract: Powders of commercially pure magnesium (c.p. Mg), AZ91 magnesium alloy and zinc were milled using a high-energy mill. The effect of high energy milling (HEM) on powders morphology, chemical composition, crystallite size and compaction of different powders mixtures were studied. After compaction, samples were thermally treated at 450 °C and both density and hardness were evaluated. It was found that as milling speed and time increases, the AZ91 alloy and c.p. Mg particles were deformed and fractured up to sizes below 10 μm. X-ray diffraction patterns for both the c.p. Mg and the AZ91 powders revealed that the milling process induced changes in both the α-Mg and the β-Mg17Al12 phases. By increasing the milling speed, the crystallite size decreases by up to 70% for AZ91 powders and by 80% for magnesium powders. The relative densities of the compacted AZ samples were greater than 85% and this parameter increased for all samples after thermal treatment at 450 °C, obtaining densities higher than 88%. Hardness measurements disclosed values as high as 84.3 HR15T. Theoretical calculations of mechanical strength were obtained for all samples based on the hardness values measured, finding very encouraging results for the three Mg alloys. Graphic Abstract: [Figure not available: see fulltext.].

KW - AZ91 magnesium alloy

KW - Crystallite size

KW - High energy milling

KW - Mg

KW - Particle size

KW - Thermal treatment

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DO - 10.1007/s12540-019-00490-1

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AN - SCOPUS:85074647222

JO - Metals and Materials International

JF - Metals and Materials International

SN - 1598-9623

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