Influence of static magnetic field on microstructure and mechanical behavior of selective laser melted AlSi10Mg alloy

Dafan Du; James C. Haley; Anping Dong; Yves Fautrelle; Da Shu; Guoliang Zhu; Xi Li; Baode Sun; Enrique J. Lavernia

doi:10.1016/j.matdes.2019.107923

Influence of static magnetic field on microstructure and mechanical behavior of selective laser melted AlSi10Mg alloy

Dafan Du
, James C. Haley
, Anping Dong
, Yves Fautrelle
, Da Shu
, Guoliang Zhu
, Xi Li
, Baode Sun
, Enrique J. Lavernia

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

116 Scopus citations

Abstract

In this work, the influence of a static magnetic field on the microstructure and mechanical behavior of AlSi10Mg alloy was studied. Our findings show that the applied magnetic field results in increase of the relative density and decrease of cellular dendrite spacing in the processed material. Moreover, the fraction of grains with a columnar morphology decreases and the fraction of equiaxed grains increases with increasing magnetic field intensity. As a result, the AlSi10Mg alloys fabricated via selective laser melted (SLM) with a superimposed magnetic field exhibited both a high ultimate tensile strength and ductility, which are superior to the AlSi10Mg alloys using identical process parameters without magnetic field. Furthermore, the influence of a static magnetic field on the melt pool scale and mushy zone scale was analyzed and simulated numerically. Our results suggest that the decrease pores density may be attributed to magnetic damping of convection and the volume force imposed on the cellular dendrite reaches 10⁵ N/m³, which is sufficient to fracture the columnar grains and refine the cellular dendrite spacing. The present study provides novel insight into the potential of using a superimposed magnetic field during SLM processing and the associated benefits in terms of materials performance.

Original language	English
Article number	107923
Journal	Materials and Design
Volume	181
DOIs	https://doi.org/10.1016/j.matdes.2019.107923
State	Published - Nov 5 2019
Externally published	Yes

Funding

This work was sponsored by the National Natural Science Foundation of China (Nos. 51771118, U1760110 and 51821001), the National Key Research and Development Program of China (Grant No. 2018YFB2001800) and the China Postdoctoral Science Foundation (2017M620154). Prof. Enrique J. Lavernia and James C. Haley wish to acknowledge support from the U.S. Army Research Office under grants W911NF-18-1-0279. The first author appreciates the International Postdoctoral Fellowship Program from China Postdoctoral Council (No. 20180062). This work was sponsored by the National Natural Science Foundation of China (Nos. 51771118 , U1760110 and 51821001 ), the National Key Research and Development Program of China (Grant No. 2018YFB2001800 ) and the China Postdoctoral Science Foundation ( 2017M620154 ). Prof. Enrique J. Lavernia and James C. Haley wish to acknowledge support from the U.S. Army Research Office under grants W911NF-18-1-0279 . The first author appreciates the International Postdoctoral Fellowship Program from China Postdoctoral Council (No. 20180062).

Keywords

AlSi10Mg alloys
Mechanical properties
Selective laser melting
Static magnetic field
Thermoelectric magnetic effects

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10.1016/j.matdes.2019.107923

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title = "Influence of static magnetic field on microstructure and mechanical behavior of selective laser melted AlSi10Mg alloy",

abstract = "In this work, the influence of a static magnetic field on the microstructure and mechanical behavior of AlSi10Mg alloy was studied. Our findings show that the applied magnetic field results in increase of the relative density and decrease of cellular dendrite spacing in the processed material. Moreover, the fraction of grains with a columnar morphology decreases and the fraction of equiaxed grains increases with increasing magnetic field intensity. As a result, the AlSi10Mg alloys fabricated via selective laser melted (SLM) with a superimposed magnetic field exhibited both a high ultimate tensile strength and ductility, which are superior to the AlSi10Mg alloys using identical process parameters without magnetic field. Furthermore, the influence of a static magnetic field on the melt pool scale and mushy zone scale was analyzed and simulated numerically. Our results suggest that the decrease pores density may be attributed to magnetic damping of convection and the volume force imposed on the cellular dendrite reaches 105 N/m3, which is sufficient to fracture the columnar grains and refine the cellular dendrite spacing. The present study provides novel insight into the potential of using a superimposed magnetic field during SLM processing and the associated benefits in terms of materials performance.",

keywords = "AlSi10Mg alloys, Mechanical properties, Selective laser melting, Static magnetic field, Thermoelectric magnetic effects",

author = "Dafan Du and Haley, \{James C.\} and Anping Dong and Yves Fautrelle and Da Shu and Guoliang Zhu and Xi Li and Baode Sun and Lavernia, \{Enrique J.\}",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

month = nov,

day = "5",

doi = "10.1016/j.matdes.2019.107923",

language = "English",

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T1 - Influence of static magnetic field on microstructure and mechanical behavior of selective laser melted AlSi10Mg alloy

AU - Du, Dafan

AU - Haley, James C.

AU - Dong, Anping

AU - Fautrelle, Yves

AU - Shu, Da

AU - Zhu, Guoliang

AU - Li, Xi

AU - Sun, Baode

AU - Lavernia, Enrique J.

PY - 2019/11/5

Y1 - 2019/11/5

N2 - In this work, the influence of a static magnetic field on the microstructure and mechanical behavior of AlSi10Mg alloy was studied. Our findings show that the applied magnetic field results in increase of the relative density and decrease of cellular dendrite spacing in the processed material. Moreover, the fraction of grains with a columnar morphology decreases and the fraction of equiaxed grains increases with increasing magnetic field intensity. As a result, the AlSi10Mg alloys fabricated via selective laser melted (SLM) with a superimposed magnetic field exhibited both a high ultimate tensile strength and ductility, which are superior to the AlSi10Mg alloys using identical process parameters without magnetic field. Furthermore, the influence of a static magnetic field on the melt pool scale and mushy zone scale was analyzed and simulated numerically. Our results suggest that the decrease pores density may be attributed to magnetic damping of convection and the volume force imposed on the cellular dendrite reaches 105 N/m3, which is sufficient to fracture the columnar grains and refine the cellular dendrite spacing. The present study provides novel insight into the potential of using a superimposed magnetic field during SLM processing and the associated benefits in terms of materials performance.

AB - In this work, the influence of a static magnetic field on the microstructure and mechanical behavior of AlSi10Mg alloy was studied. Our findings show that the applied magnetic field results in increase of the relative density and decrease of cellular dendrite spacing in the processed material. Moreover, the fraction of grains with a columnar morphology decreases and the fraction of equiaxed grains increases with increasing magnetic field intensity. As a result, the AlSi10Mg alloys fabricated via selective laser melted (SLM) with a superimposed magnetic field exhibited both a high ultimate tensile strength and ductility, which are superior to the AlSi10Mg alloys using identical process parameters without magnetic field. Furthermore, the influence of a static magnetic field on the melt pool scale and mushy zone scale was analyzed and simulated numerically. Our results suggest that the decrease pores density may be attributed to magnetic damping of convection and the volume force imposed on the cellular dendrite reaches 105 N/m3, which is sufficient to fracture the columnar grains and refine the cellular dendrite spacing. The present study provides novel insight into the potential of using a superimposed magnetic field during SLM processing and the associated benefits in terms of materials performance.

KW - AlSi10Mg alloys

KW - Mechanical properties

KW - Selective laser melting

KW - Static magnetic field

KW - Thermoelectric magnetic effects

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DO - 10.1016/j.matdes.2019.107923

M3 - Article

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JO - Materials and Design

JF - Materials and Design

M1 - 107923

ER -

Influence of static magnetic field on microstructure and mechanical behavior of selective laser melted AlSi10Mg alloy

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