Influence of powder surface chemistry on the defect formation in AlSi10Mg alloy processed via laser powder bed fusion additive manufacturing

被引：4

作者：

Ilangovan, Ranjith Kumar ^{[1
,2
]}

Koundinya, N. T. B. N. ^{[2
,3
]}

Krishnaswamy, Hariharan ^{[1
]}

Kumar, Gurunathan Saravana ^{[4
]}

Amirthalingam, Murugaiyan ^{[2
]}

Kottada, Ravi Sankar ^{[2
]}

机构：

[1] Indian Inst Technol Madras, Dept Mech Engn, Chennai 600036, India

[2] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, India

[3] Max Planck Inst Eisenforschung, Max Planck Str 1, D-40237 Dusseldorf, Germany

[4] Indian Inst Technol Madras, Dept Engn Design, Chennai 600036, India

来源：

MATERIALIA | 2024年 / 34卷

关键词：

LPBF; AlSi10Mg; oxygen; oxides; porosity; surface chemistry; surface tension; ALUMINUM-ALLOY; SINTERING/MELTING SLS/SLM; FORMATION MECHANISMS; POROSITY FORMATION; PROCESS PARAMETERS; OXYGEN-CONTENT; SINGLE TRACKS; FLOW PATTERNS; MOLTEN POOL; AL-MG;

D O I：

10.1016/j.mtla.2024.102102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In laser powder bed fusion(LPBF) additive manufacturing(AM) of Al alloys, surface chemistry and dissolved gas composition(oxygen/oxides/hydroxides, hydrogen and moisture) of AM powders is a major influencing factor for porosity formation. Therefore, in the present investigation, this aspect is addressed using two sets of virgin AM AlSi10Mg powders, namely, Hi-Ox (2770 ppm oxygen) and Lo-Ox (660 ppm oxygen), to assess the printability under various processing parameters and defect formation in printed parts. Comprehensive and in-depth metallurgical analysis of both powders utilizing multiple characterisation techniques established the presence of various types of oxides/hydroxides with different complex chemistries on the powders' surface. Enhanced spherical gas porosity and oxide inclusions were witnessed in Hi-Ox print coupons in contrast to the least defects in Lo-Ox coupons rationalized due to surface chemistry difference between the virgin powders. Consequently, the mechanical properties of the Hi-Ox print coupons, even with minimum defect density, are significantly inferior to Lo-Ox specimens. These observations suggest a competing influence of surface chemistry/dissolved gas composition and laser parameters for the processing of both powders. Overall, by correlating the microstructures with processing conditions and oxide concentration, defects morphology, the probable melt pool formation mechanism in LPBF of AlSi10Mg alloy (for high and low oxygen concentration) is elucidated.

引用

页数：23

共 124 条

[1]

Aboulkhair N.T., 2014, Addit Manuf, V1-4, P77, DOI DOI 10.1016/J.ADDMA.2014.08.001

[2] 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting [J].

Aboulkhair, Nesma T. ;

Simonelli, Marco ;

Parry, Luke ;

Ashcroft, Ian ;

Tuck, Christopher ;

Hague, Richard .

PROGRESS IN MATERIALS SCIENCE, 2019, 106

[3] On the formation of A1Si10Mg single tracks and layers in selective laser melting: Microstructure and nano-mechanical properties [J].

Aboulkhair, Nesma T. ;

Maskery, Ian ;

Tuck, Chris ;

Ashcroft, Ian ;

Everitt, Nicola M. .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2016, 230 :88-98

[4] Quantification of oxide film thickness at the surface of aluminium using XPS [J].

Alexander, MR ;

Thompson, GE ;

Zhou, X ;

Beamson, G ;

Fairley, N .

SURFACE AND INTERFACE ANALYSIS, 2002, 34 (01) :485-489

[5] The effects of short pulse laser surface cleaning on porosity formation and reduction in laser welding of aluminium alloy for automotive component manufacture [J].

AlShaer, A. W. ;

Li, L. ;

Mistry, A. .

OPTICS AND LASER TECHNOLOGY, 2014, 64 :162-171

[6]

[Anonymous], 2014, EOS Aluminium AlSi10Mg, V49, P1

[7] Effect of atomic oxygen exposure on bubble formation in aluminum alloy [J].

Aoki, Y ;

Fujii, H ;

Nogi, K .

JOURNAL OF MATERIALS SCIENCE, 2004, 39 (05) :1779-1783

[8] Role of powder particle size on laser powder bed fusion processability of AlSi10mg alloy [J].

Balbaa, M. A. ;

Ghasemi, A. ;

Fereiduni, E. ;

Elbestawi, M. A. ;

Jadhav, S. D. ;

Kruth, J-P .

ADDITIVE MANUFACTURING, 2021, 37

[9] Investigations of aging behaviour for aluminium powders during an atmosphere simulation of the LBM process [J].

Bauer, Dominik M. ;

Schwarzenboeck, Elisabeth ;

Ludwig, Ina ;

Schupp, Norbert ;

Palm, Frank ;

Witt, Gerd .

POWDER METALLURGY, 2017, 60 (03) :175-183

[10] Selective laser melting of AlSi10Mg: Effects of scan direction, part placement and inert gas flow velocity on tensile strength [J].

Bin Anwar, Ahmad ;

Quang-Cuong Pham .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2017, 240 :388-396

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