Achieving ultra-high strength and ductility in Mg–9Al–1Zn–0.5Mn alloy via selective laser melting

Chang，Cheng1,3,4; Liao，Hanlin1,3; Yi，Lin1,2; Dai，Yilong2; Cox，Sophie C.4; Yan，Ming5,6; Liu，Min1; Yan，Xingchen1

2023-04-01

10.1016/j.apmate.2022.100097

Advanced Powder Materials   影响因子和分区

2772-834X

Fabrication of the Mg–9Al–1Zn–0.5Mn alloy with excellent mechanical performance using selective laser melting (SLM) technology is quite difficult owing to the poor weldability and low boiling point. To address these challenges and seek the optimal processing parameters, response surface methodology was systematically utilized to determine the appropriate SLM parameter combinations. Mg–9Al–1Zn–0.5Mn sample with high relative density (99.5 ​± ​0.28%) and favorable mechanical properties (microhardness ​= ​95.6 ​± ​5.28 HV, UTS ​= ​370.2 ​MPa, and A ​= ​10.4%) was achieved using optimized SLM parameters (P ​= ​120 ​W, v ​= ​500 ​mm/s, and h ​= ​45 ​μm). Sample ​is dominated by a random texture and microstructure is primarily constituted by quantities of fine equiaxed grains (α-Mg phase), a small amount of β-AlMg structures (4.96 ​vol%, including spherical: [21¯1¯0]// [111] and long lath-like: [21¯1¯0]// [11¯5] or [1¯011]// [32¯1¯]), and some short rod-shaped AlMn nanoparticles. Benefiting from grain boundary strengthening, solid solution strengthening, and precipitation hardening of various nanoparticles (β-AlMg and AlMn), high-performance Mg–9Al–1Zn–0.5Mn alloy biomedical implants can be fabricated. Precipitation hardening dominates the strengthening mechanism of the SLM Mg–9Al–1Zn–0.5Mn alloy.

Mechanical properties Mg–Zn–Al–Mn alloy Microstructural evolution Response surface analysis Selective laser melting

ESCI

英语

其他

Guangdong Academy of Sciences[2021GDASYL-20210102005];Guangdong Academy of Sciences[2022GDASZH-2022010107];Guangdong Academy of Sciences[2022GDASZH-2022010203-003];China Association for Science and Technology[YESS20210269];

Materials Science

Materials Science, Multidisciplinary

WOS:001037529400001

KEAI PUBLISHING LTD

2-s2.0-85141807529

Scopus

1.Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,National Engineering Laboratory of Modern Materials Surface Engineering Technology,Institute of New Materials,Guangdong Academy of Sciences,Guangzhou,510651,China
2.School of Materials Science and Engineering,Xiangtan University,Xiangtan,411105,China
3.ICB UMR 6303,CNRS,Univ. Bourgogne Franche-Comté,UTBM,Belfort,F-90010,France
4.School of Chemical Engineering,University of Birmingham,Birmingham,Edgbaston,B15 2TT,United Kingdom
5.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.Jiaxing Research Institute,Southern University of Science and Technology,Jiaxing,314050,China

Chang，Cheng,Liao，Hanlin,Yi，Lin,等. Achieving ultra-high strength and ductility in Mg–9Al–1Zn–0.5Mn alloy via selective laser melting[J]. Advanced Powder Materials,2023,2(2).

Chang，Cheng.,Liao，Hanlin.,Yi，Lin.,Dai，Yilong.,Cox，Sophie C..,...&Yan，Xingchen.(2023).Achieving ultra-high strength and ductility in Mg–9Al–1Zn–0.5Mn alloy via selective laser melting.Advanced Powder Materials,2(2).

Chang，Cheng,et al."Achieving ultra-high strength and ductility in Mg–9Al–1Zn–0.5Mn alloy via selective laser melting".Advanced Powder Materials 2.2(2023).