Influence of microstructural heterogeneities on small-scale mechanical properties of an additively manufactured Al-Ce-Ni-Mn alloy

被引:3
作者
Ajantiwalay, Tanvi [1 ]
Michi, Richard [2 ]
Roach, Christian [1 ]
Shyam, Amit [2 ]
Plotkowski, Alex [2 ]
Devaraj, Arun [1 ]
机构
[1] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99354 USA
[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37830 USA
来源
ADDITIVE MANUFACTURING LETTERS | 2022年 / 3卷
关键词
Aluminum alloys; Additive manufacturing; Nanoindentation; Micro-pillar compression; Melt pool boundaries; ELASTIC-MODULUS; INDENTATION; HARDNESS; ALSI10MG;
D O I
10.1016/j.addlet.2022.100092
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Laser powder bed fusion-based additive manufacturing (AM) is a promising method to fabricate creep-resistant Al-rare earth alloys (Al-Ce-Ni-Mn) with stable microstructures at up to 400 & DEG;C. However, creep testing of these alloys at high temperatures shows that void coalescence and failure initiation occurs along the melt pool bound-aries in the microstructure. Hence it is crucial to understand how the local mechanical behavior of the melt pool boundaries would influence the global properties of the AM produced alloy. In this study, in situ nanoin-dentation conducted at room temperature and 300 & DEG;C revealed a reduced hardness at the melt pool boundaries. Similarly, micro-pillar compression showed a slight decline in yield strength at these boundaries, indicating that they are the weak spots in the microstructure. Such multimodal local mechanical property studies are necessary for understanding the influence of melt pool boundaries on the bulk response of fusion-based AM alloys.
引用
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页数:7
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共 41 条
[1]   The microstructure and mechanical properties of selectively laser melted AlSi10Mg: The effect of a conventional T6-like heat treatment [J].
Aboulkhair, Nesma T. ;
Maskery, Ian ;
Tuck, Chris ;
Ashcroft, Ian ;
Everitt, Nicola M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 667 :139-146
[2]   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
[3]   Nano-hardness and microstructure of selective laser melted AlSi10Mg scan tracks [J].
Aboulkhair, Nesma T. ;
Maskery, Ian ;
Tuck, Chris ;
Ashcroft, Ian ;
Everitt, Nicola M. .
INDUSTRIAL LASER APPLICATIONS SYMPOSIUM (ILAS 2015), 2015, 9657
[4]   Post heat treatment of additive manufactured AlSi10Mg: On silicon morphology, texture and small-scale properties [J].
Alghamdi, F. ;
Song, X. ;
Hadadzadeh, A. ;
Shalchi-Amirkhiz, B. ;
Mohammadi, M. ;
Haghshenas, M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2020, 783
[5]   Elevated temperature ductility dip in an additively manufactured Al-Cu-Ce alloy * [J].
Bahl, Sumit ;
Plotkowski, Alex ;
Sisco, Kevin ;
Leonard, Donovan N. ;
Allard, Lawrence F. ;
Michi, Richard A. ;
Poplawsky, Jonathan D. ;
Dehoff, Ryan ;
Shyam, Amit .
ACTA MATERIALIA, 2021, 220
[6]   Heterogeneous microstructure and voids dependence of tensile deformation in a selective laser melted AlSi10Mg alloy [J].
Ben, D. D. ;
Ma, Y. R. ;
Yang, H. J. ;
Meng, L. X. ;
Shao, X. H. ;
Liu, H. Q. ;
Wang, S. G. ;
Duan, Q. Q. ;
Zhang, Z. F. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2020, 798 (798)
[7]   Selective laser melting of AlSi10 Mg: Influence of process parameters on Mg2Si precipitation and Si spheroidization [J].
Biffi, C. A. ;
Fiocchi, J. ;
Tuissi, A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 755 :100-107
[8]   Strongly out-of-equilibrium growth morphologies in fast solidifying eutectics [J].
Boussinot, G. ;
Doering, M. ;
Schmidt, M. ;
Apel, M. .
PHYSICAL REVIEW MATERIALS, 2022, 6 (04)
[9]   Enhanced tensile ductility of an additively manufactured AlSi10Mg alloy by reducing the density of melt pool boundaries [J].
Chen, Haoxiu ;
Patel, Sagar ;
Vlasea, Mihaela ;
Zou, Yu .
SCRIPTA MATERIALIA, 2022, 221
[10]   Microstructure and mechanical properties of Al-Mg-Zr alloys processed by selective laser melting [J].
Croteau, Joseph R. ;
Griffiths, Seth ;
Rossell, Marta D. ;
Leinenbach, Christian ;
Kenel, Christoph ;
Jansen, Vincent ;
Seidman, David N. ;
Dunand, David C. ;
Vo, Nhon Q. .
ACTA MATERIALIA, 2018, 153 :35-44