Influence of build orientation on the creep behavior of IN738LC manufactured with laser powder bed fusion

被引：11

作者：

Megahed, Sandra ^{[1
]}

Kraemer, Karl Michael ^{[1
]}

Heinze, Christoph ^{[2
]}

Kontermann, Christian ^{[3
]}

Udoh, Annett ^{[3
]}

Weihe, Stefan ^{[3
]}

Oechsner, Matthias ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Chair & Inst Mat Technol, Grafenstr 2, D-64283 Darmstadt, Germany

[2] Siemens Energy Global GmbH & Co KG, Gas Serv, Addit Mfg Technol Innovat & Digitalisat, Huttenstr 12, D-10553 Berlin, Germany

[3] Univ Stuttgart, Mat Testing Inst, Pfaffenwaldring 32, D-70569 Stuttgart, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2023年 / 878卷

关键词：

Laser powder bed fusion; Build orientation; IN738LC; Creep; Microstructure; HEAT-TREATMENT; MECHANICAL-PROPERTIES; MICROSTRUCTURE; SUPERALLOY; TEMPERATURE;

D O I：

10.1016/j.msea.2023.145197

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

While metal Laser Powder Bed Fusion (PBF-LB/M) offers many advantages, such as increased design freedom, it is yet to be accepted as a reliable manufacturing route. Due to the highly oriented solidification of the PBF-LB/M process, the microstructural anisotropy significantly affects mechanical short-and long-term properties. Component build orientation directly influences grain morphology and orientation and thus mechanical properties.In this study, IN738LC creep samples are manufactured in three build orientations (0 & DEG;, 45 & DEG; and 90 & DEG;) using PBFLB/M. Creep tests are carried out at 750 & DEG;C and 850 & DEG;C with applied stresses up to 350 MPa. While the results of 90 & DEG; and 0 & DEG; agree with the creep results of other Ni-superalloys manufactured with PBF-LB/M, where the 90 & DEG; specimen achieves the longest time to rupture and largest creep strain, the 45 & DEG; specimen shows differing creep results compared to other Ni-superalloys with the least time to fracture. This study discusses the correlation between microstructure and build direction and their effect on creep behavior, especially on the 45 & DEG; specimen.

引用

页数：13

共 42 条

[1]

Aggarangsi P, 2006, LOCALIZED PREHEATING

[2] Morphological changes of γ′ precipitates in superalloy IN738LC at various cooling rates [J].

Behrouzghaemi, S. ;

Mitchell, R. J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 498 (1-2) :266-271

[3] Elucidating the effects of solution and double ageing treatment on the mechanical properties and toughness of MAR-M247 superalloy at high temperature [J].

Bor, H. Y. ;

Wei, C. N. ;

Jeng, R. R. ;

Ko, P. Y. .

MATERIALS CHEMISTRY AND PHYSICS, 2008, 109 (2-3) :334-341

[4]

Callister W.D., 2015, FUNDAMENTALS MAT SCI, Vfifth

[5]

Carter L.N., 2013, Selective laser melting of nickel superalloys for high temperature applications

[6] The influence of the laser scan strategy on grain structure and cracking behaviour in SLM powder-bed fabricated nickel superalloy [J].

Carter, Luke N. ;

Martin, Christopher ;

Withers, Philip J. ;

Attallah, Moataz M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 615 :338-347

[7] Effects of heat treatment on microstructure and creep properties of a laser powder bed fused nickel superalloy [J].

Davies, S. J. ;

Jeffs, S. P. ;

Coleman, M. P. ;

Lancaster, R. J. .

MATERIALS & DESIGN, 2018, 159 :39-46

[8] Additive manufacturing of metallic components - Process, structure and properties [J].

DebRoy, T. ;

Wei, H. L. ;

Zuback, J. S. ;

Mukherjee, T. ;

Elmer, J. W. ;

Milewski, J. O. ;

Beese, A. M. ;

Wilson-Heid, A. ;

De, A. ;

Zhang, W. .

PROGRESS IN MATERIALS SCIENCE, 2018, 92 :112-224

[9]

DIN EN ISO, 2016, 172964 DIN EN ISO

[10]

DIN EN ISO, 2016, 172963 DIN EN ISO

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