Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing
Al-Ce-based alloys are promising candidates for additive manufacturing (AM) due to their hot-cracking resistance and because they do not require heat treatment to obtain precipitation strengthening. Rapid solidification rates enabled by AM methods can lead to enhanced mechanical properties; however,...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523004240 |
| _version_ | 1797794118698532864 |
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| author | S. Nam E. Simsek N. Argibay O. Rios H.B. Henderson D. Weiss E.E. Moore A.P. Perron S.K. McCall R.T. Ott |
| author_facet | S. Nam E. Simsek N. Argibay O. Rios H.B. Henderson D. Weiss E.E. Moore A.P. Perron S.K. McCall R.T. Ott |
| author_sort | S. Nam |
| collection | DOAJ |
| description | Al-Ce-based alloys are promising candidates for additive manufacturing (AM) due to their hot-cracking resistance and because they do not require heat treatment to obtain precipitation strengthening. Rapid solidification rates enabled by AM methods can lead to enhanced mechanical properties; however, the strengthening mechanisms over large composition ranges were unclear. Here, combinatorial synthesis by directed-energy deposition (DED) and hardness measurements were used to rapidly map the composition-dependent strength of the ternary Al-Ce-Mg system. Tensile testing and microstructure characterization of selected compositions were performed to elucidate the compositional dependence of the strengthening mechanisms. Al11Ce3 precipitates were present in all cases, and the maximum hardness (1.25 GPa) was measured for the Al-8Ce-10Mg composition. A combination of (i) Hall-Petch strengthening, based on the FCC-matrix-phase cell size; (ii) particle strengthening, based on Al11Ce3 volume fraction and size; and (iii) solid-solution strengthening, based on Mg composition of the matrix phase, were used to account for the measured strengths. Vickers hardness is shown to correlate well with ultimate tensile strength in these alloys, highlighting the value of surface-based techniques for rapid screening. |
| first_indexed | 2024-03-13T02:57:06Z |
| format | Article |
| id | doaj.art-f5a5dd4830bf442a9646f0ed8932b338 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-13T02:57:06Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-f5a5dd4830bf442a9646f0ed8932b3382023-06-28T04:28:26ZengElsevierMaterials & Design0264-12752023-07-01231112009Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturingS. Nam0E. Simsek1N. Argibay2O. Rios3H.B. Henderson4D. Weiss5E.E. Moore6A.P. Perron7S.K. McCall8R.T. Ott9Division of Materials Science and Engineering, Ames National Laboratory, United States; Critical Materials Institute, United StatesDivision of Materials Science and Engineering, Ames National Laboratory, United States; Critical Materials Institute, United StatesDivision of Materials Science and Engineering, Ames National Laboratory, United States; Critical Materials Institute, United StatesUniversity of Tennessee, Knoxville, United States; Critical Materials Institute, United StatesLawrence Livermore National Laboratory, United States; Critical Materials Institute, United StatesEck Industries, Manitowoc, WI, United States; Critical Materials Institute, United StatesLawrence Livermore National Laboratory, United States; Critical Materials Institute, United StatesLawrence Livermore National Laboratory, United States; Critical Materials Institute, United StatesLawrence Livermore National Laboratory, United States; Critical Materials Institute, United StatesDivision of Materials Science and Engineering, Ames National Laboratory, United States; Critical Materials Institute, United States; Corresponding author at: Division of Materials Science and Engineering, Ames National Laboratory, United States.Al-Ce-based alloys are promising candidates for additive manufacturing (AM) due to their hot-cracking resistance and because they do not require heat treatment to obtain precipitation strengthening. Rapid solidification rates enabled by AM methods can lead to enhanced mechanical properties; however, the strengthening mechanisms over large composition ranges were unclear. Here, combinatorial synthesis by directed-energy deposition (DED) and hardness measurements were used to rapidly map the composition-dependent strength of the ternary Al-Ce-Mg system. Tensile testing and microstructure characterization of selected compositions were performed to elucidate the compositional dependence of the strengthening mechanisms. Al11Ce3 precipitates were present in all cases, and the maximum hardness (1.25 GPa) was measured for the Al-8Ce-10Mg composition. A combination of (i) Hall-Petch strengthening, based on the FCC-matrix-phase cell size; (ii) particle strengthening, based on Al11Ce3 volume fraction and size; and (iii) solid-solution strengthening, based on Mg composition of the matrix phase, were used to account for the measured strengths. Vickers hardness is shown to correlate well with ultimate tensile strength in these alloys, highlighting the value of surface-based techniques for rapid screening.http://www.sciencedirect.com/science/article/pii/S0264127523004240Al-Ce alloysDirected-energy depositionCombinatorial approachAdditive manufacturingMechanical properties |
| spellingShingle | S. Nam E. Simsek N. Argibay O. Rios H.B. Henderson D. Weiss E.E. Moore A.P. Perron S.K. McCall R.T. Ott Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing Materials & Design Al-Ce alloys Directed-energy deposition Combinatorial approach Additive manufacturing Mechanical properties |
| title | Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing |
| title_full | Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing |
| title_fullStr | Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing |
| title_full_unstemmed | Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing |
| title_short | Strength mechanisms and tunability in Al-Ce-Mg ternary alloys enabled by additive manufacturing |
| title_sort | strength mechanisms and tunability in al ce mg ternary alloys enabled by additive manufacturing |
| topic | Al-Ce alloys Directed-energy deposition Combinatorial approach Additive manufacturing Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523004240 |
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