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

doi:10.1007/s12540-019-00490-1

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

Research output: Contribution to journal › Article › peer-review

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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.].

Original language	English
Pages (from-to)	1113-1130
Number of pages	18
Journal	Metals and Materials International
Volume	27
Issue number	5
DOIs	https://doi.org/10.1007/s12540-019-00490-1
State	Accepted/In press - 1 Jan 2019

Keywords

AZ91 magnesium alloy
Crystallite size
High energy milling
Mg
Particle size
Thermal treatment

Product types of Minciencias

A1 article - Q1

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10.1007/s12540-019-00490-1

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@article{a82c52aa7ba343b48d21bd1d2f629eaa,

title = "Improved Mg–Al–Zn Magnesium Alloys Produced by High Energy Milling and Hot Sintering",

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.].",

keywords = "AZ91 magnesium alloy, Crystallite size, High energy milling, Mg, Particle size, Thermal treatment",

author = "Y. Galindez and E. Correa and Zuleta, {A. A.} and A. Valencia-Escobar and D. Calderon and L. Toro and P. Chac{\'o}n and {Echeverr{\'i}a E}, F.",

note = "Funding Information: The authors are grateful to Universidad de Antioquia, Universidad Pontificia Bolivariana, Universidad de Medell{\'i}n, Servicio Nacional de Aprendizaje - SENA and COLCIENCIAS for financial assistance (Project FP44842-023-2017). Funding Information: The authors are grateful to Universidad de Antioquia, Universidad Pontificia Bolivariana, Universidad de Medell?n, Servicio Nacional de Aprendizaje - SENA and COLCIENCIAS for financial assistance (Project FP44842-023-2017). Publisher Copyright: {\textcopyright} 2019, The Korean Institute of Metals and Materials.",

year = "2019",

month = jan,

day = "1",

doi = "10.1007/s12540-019-00490-1",

language = "Ingl{\'e}s",

volume = "27",

pages = "1113--1130",

journal = "Metals and Materials International",

issn = "1598-9623",

publisher = "Korean Institute of Metals and Materials",

number = "5",

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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.

N1 - Funding Information: The authors are grateful to Universidad de Antioquia, Universidad Pontificia Bolivariana, Universidad de Medellín, Servicio Nacional de Aprendizaje - SENA and COLCIENCIAS for financial assistance (Project FP44842-023-2017). Funding Information: The authors are grateful to Universidad de Antioquia, Universidad Pontificia Bolivariana, Universidad de Medell?n, Servicio Nacional de Aprendizaje - SENA and COLCIENCIAS for financial assistance (Project FP44842-023-2017). Publisher Copyright: © 2019, The Korean Institute of Metals and Materials.

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

UR - http://www.scopus.com/inward/record.url?scp=85074647222&partnerID=8YFLogxK

U2 - 10.1007/s12540-019-00490-1

DO - 10.1007/s12540-019-00490-1

M3 - Artículo

AN - SCOPUS:85074647222

SN - 1598-9623

VL - 27

SP - 1113

EP - 1130

JO - Metals and Materials International

JF - Metals and Materials International

IS - 5

ER -

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

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