Enhancement in mechanical properties of selectively laser-melted AlSi10Mg aluminum alloys by T6-like heat treatment

被引：124

作者：

Wang, L. F. ^{[1
,2
,4
]}

Sun, J. ^{[1
,4
]}

Yu, X. L. ^{[3
]}

Shi, Y. ^{[1
,4
]}

Zhu, X. G. ^{[1
,4
]}

Cheng, L. Y. ^{[1
,4
]}

Liang, H. H. ^{[3
,5
]}

Yan, B. ^{[2
]}

Guo, L. J. ^{[1
,4
]}

机构：

[1] Shanghai Aerosp Equipments Manufacturer Co Ltd, Shanghai 200245, Peoples R China

[2] Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China

[3] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat LMBD, Hefei 230026, Anhui, Peoples R China

[4] Shanghai Res Ctr Complex Met Parts Addit Mfg, Shanghai 200245, Peoples R China

[5] Univ Sci & Technol China, Inst Adv Technol, IAT Chungu Joint Lab Addit Mfg, Hefei 230026, Anhui, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 734卷

关键词：

Selective laser melting; Aluminum alloy; T6 heat treatment; Mechanical properties; Microstructure; MG CASTING ALLOYS; AL-12SI ALLOY; SI ALLOYS; MICROSTRUCTURE; BEHAVIOR; PRECIPITATION; STRENGTH; PARTS; SOLIDIFICATION; DENSIFICATION;

D O I：

10.1016/j.msea.2018.07.103

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work proposes a T6-like heat treatment, including solid-solution treatment at 535 degrees C and an artificial aging treatment for 10 h at 158 degrees C, to control the mechanical behavior of selective-laser- melting (SLM)-produced AlSil0Mg alloys. The mechanical properties of the AlSil0Mg alloys, such as densification, hardness, and tensile/ bending strength, were investigated, and the microstructure of the alloys was analyzed. The results reveal that the tensile strength of the heat-treated samples slightly decreased by 19.97% (from 334 MPa to 267.3 MPa of the as-fabricated samples), while the elongation showed a remarkable increase by up to 155% (from 3.64% to 9.28%). Likewise, the bending strength slightly decreased by 6.1%, while the fracture deflection dramatically increased by up to 122.9% after T6 heat treatment. Thus, the T6 heat treatment can critically enhance plasticity/ ductility without any significant loss in the tensile/bending strength of the alloy. The corresponding mechanism is also elucidated based on the spheroidization and diffusion of silicon precipitation during the T6 heat treatment. The results of this study offer an intriguing insight to tailor the mechanical properties of SLM-fabricated AlSil0Mg alloys using suitable solid solutions and artificial aging treatment.

引用

页码：299 / 310

页数：12

共 72 条

[21] Additive manufacturing of metals [J].

Herzog, Dirk ;

Seyda, Vanessa ;

Wycisk, Eric ;

Emmelmann, Claus .

ACTA MATERIALIA, 2016, 117 :371-392

[22] Characterization and modeling of the influence of artificial aging on the microstructural evolution of age-hardenable AlSi10Mg(Cu) aluminum alloys [J].

Izcara, X. Larrayoz ;

Blank, A. Guirao ;

Pyczak, E. ;

Staron, P. ;

Schumann, S. ;

Huber, N. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 610 :46-53

[23] Mechanical properties of AlSi10Mg produced by Selective Laser Melting [J].

Kempen, K. ;

Thijs, L. ;

Van Humbeeck, J. ;

Kruth, J. -P. .

LASER ASSISTED NET SHAPE ENGINEERING 7 (LANE 2012), 2012, 39 :439-446

[24] Microstructure and mechanical properties of Selective Laser Melted 18Ni-300 steel [J].

Kempen, K. ;

Yasa, E. ;

Thijs, L. ;

Kruth, J. -P. ;

Van Humbeeck, J. .

LASERS IN MANUFACTURING 2011: PROCEEDINGS OF THE SIXTH INTERNATIONAL WLT CONFERENCE ON LASERS IN MANUFACTURING, VOL 12, PT A, 2011, 12 :255-263

[25] Effect of silicon content on densification, mechanical and thermal properties of Al-xSi binary alloys fabricated using selective laser melting [J].

Kimura, Takahiro ;

Nakamoto, Takayuki ;

Mizuno, Masataka ;

Araki, Hideki .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 682 :593-602

[26] Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting: Microstructure evolution, mechanical properties and fracture mechanism [J].

Li, Wei ;

Li, Shuai ;

Liu, Jie ;

Zhang, Ang ;

Zhou, Yan ;

Wei, Qingsong ;

Yan, Chunze ;

Shi, Yusheng .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 663 :116-125

[27] A selective laser melting and solution heat treatment refined Al-12Si alloy with a controllable ultrafine eutectic microstructure and 25% tensile ductility [J].

Li, X. P. ;

Wang, X. J. ;

Saunders, M. ;

Suvorova, A. ;

Zhang, L. C. ;

Liu, Y. J. ;

Fang, M. H. ;

Huang, Z. H. ;

Sercombe, T. B. .

ACTA MATERIALIA, 2015, 95 :74-82

[28] Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg [J].

Liu, Y. J. ;

Liu, Z. ;

Jiang, Y. ;

Wang, G. W. ;

Yang, Y. ;

Zhang, L. C. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 735 :1414-1421

[29] Selective laser melting of aluminium components [J].

Louvis, Eleftherios ;

Fox, Peter ;

Sutcliffe, Christopher J. .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2011, 211 (02) :275-284

[30] Residual stresses in selective laser sintering and selective laser melting [J].

Mercelis, Peter ;

Kruth, Jean-Pierre .

RAPID PROTOTYPING JOURNAL, 2006, 12 (05) :254-265

← 1 2 3 4 5 6 7 8 →