Heterogeneous precipitation strengthened non-equiatomic NiCoFeAlTi medium entropy alloy with excellent mechanical properties
The outstanding strength-ductility combination has always been a challenging problem in the development of metal materials, high entropy alloys/medium entropy alloys (HEAs/MEAs) are considered to be the key material to solve this problem. Here a novel non-equiatomic Ni46Co24Fe24Al3Ti3 MEA with equia...
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| Veröffentlicht in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-02, Vol.834, p.142617, Article 142617 |
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| container_title | Materials science & engineering. A, Structural materials : properties, microstructure and processing |
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| creator | Jia, Z.Y. Zhang, S.Z. Huo, J.T. Zhang, C.J. Zheng, L.W. Kong, F.T. Li, H. |
| description | The outstanding strength-ductility combination has always been a challenging problem in the development of metal materials, high entropy alloys/medium entropy alloys (HEAs/MEAs) are considered to be the key material to solve this problem. Here a novel non-equiatomic Ni46Co24Fe24Al3Ti3 MEA with equiaxed grains was prepared by vacuum suspension melting, which consists of FCC matrix and heterogeneous L12 precipitate. In the current work, the different states of the Ni46Co24Fe24Al3Ti3 MEA from as-cast to after thermo-mechanical processing (TMP) were systematically researched. The result shows that the heterogeneous L12 precipitate of the as-cast alloy is composed of cubic precipitates at the grain boundary and spherical precipitates in the grain interior. After TMP, a short-rod L12 precipitated by discontinuous precipitation reaction (DP) at the grain boundary, and a spherical L12 precipitated by continuous precipitation reaction (CP) in the grain interior. Meanwhile, the alloy shows outstanding mechanical properties in the tensile test at room temperature. The ultimate tensile strength of the as-cast alloy is 935 MPa, with an elongation of 32%. The strength of the alloy is further improved after TMP, the yield strength and ultimate tensile strength are respectively 820 MPa and 1236 MPa, with an elongation of 23% retained. Compared with the single-phase NiCoFe MEA, the yield strength and ultimate tensile strength are significantly increased by 310％ and 147％. The excellent mechanical properties of the alloy are attributed to the combination of the soft FCC matrix and the strengthening of the L12 precipitate.
•A non-equimolar ratio Ni46Co24Fe24Al3Ti3 HEA alloy was designed and fabricated by vacuum suspension melting.•Spherical L12 nano-precipitations precipitates in the equiaxed grain of the as-cast alloy.•Precipitation strengthening is the main strengthening mechanism of the alloy after thermo-mechanical processing. |
| doi_str_mv | 10.1016/j.msea.2022.142617 |
| format | Article |
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•A non-equimolar ratio Ni46Co24Fe24Al3Ti3 HEA alloy was designed and fabricated by vacuum suspension melting.•Spherical L12 nano-precipitations precipitates in the equiaxed grain of the as-cast alloy.•Precipitation strengthening is the main strengthening mechanism of the alloy after thermo-mechanical processing.</description><identifier>ISSN: 0921-5093</identifier><identifier>EISSN: 1873-4936</identifier><identifier>DOI: 10.1016/j.msea.2022.142617</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Alloys ; Casting alloys ; Chemical precipitation ; Elongation ; Grain boundaries ; Heterogeneous precipitation ; High entropy alloys ; L12 phase ; Mechanical properties ; Medium entropy alloy ; Medium entropy alloys ; Precipitates ; Precipitation strengthening ; Room temperature ; Tensile strength ; Tensile tests ; Thermomechanical treatment ; Ultimate tensile strength ; Yield strength ; Yield stress</subject><ispartof>Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2022-02, Vol.834, p.142617, Article 142617</ispartof><rights>2022 Elsevier B.V.</rights><rights>Copyright Elsevier BV Feb 17, 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-230f483290ad27d27869a0bed392352a1c4fee62416445ecada133984e36a5693</citedby><cites>FETCH-LOGICAL-c328t-230f483290ad27d27869a0bed392352a1c4fee62416445ecada133984e36a5693</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.msea.2022.142617$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids></links><search><creatorcontrib>Jia, Z.Y.</creatorcontrib><creatorcontrib>Zhang, S.Z.</creatorcontrib><creatorcontrib>Huo, J.T.</creatorcontrib><creatorcontrib>Zhang, C.J.</creatorcontrib><creatorcontrib>Zheng, L.W.</creatorcontrib><creatorcontrib>Kong, F.T.</creatorcontrib><creatorcontrib>Li, H.</creatorcontrib><title>Heterogeneous precipitation strengthened non-equiatomic NiCoFeAlTi medium entropy alloy with excellent mechanical properties</title><title>Materials science & engineering. A, Structural materials : properties, microstructure and processing</title><description>The outstanding strength-ductility combination has always been a challenging problem in the development of metal materials, high entropy alloys/medium entropy alloys (HEAs/MEAs) are considered to be the key material to solve this problem. Here a novel non-equiatomic Ni46Co24Fe24Al3Ti3 MEA with equiaxed grains was prepared by vacuum suspension melting, which consists of FCC matrix and heterogeneous L12 precipitate. In the current work, the different states of the Ni46Co24Fe24Al3Ti3 MEA from as-cast to after thermo-mechanical processing (TMP) were systematically researched. The result shows that the heterogeneous L12 precipitate of the as-cast alloy is composed of cubic precipitates at the grain boundary and spherical precipitates in the grain interior. After TMP, a short-rod L12 precipitated by discontinuous precipitation reaction (DP) at the grain boundary, and a spherical L12 precipitated by continuous precipitation reaction (CP) in the grain interior. Meanwhile, the alloy shows outstanding mechanical properties in the tensile test at room temperature. The ultimate tensile strength of the as-cast alloy is 935 MPa, with an elongation of 32%. The strength of the alloy is further improved after TMP, the yield strength and ultimate tensile strength are respectively 820 MPa and 1236 MPa, with an elongation of 23% retained. Compared with the single-phase NiCoFe MEA, the yield strength and ultimate tensile strength are significantly increased by 310％ and 147％. The excellent mechanical properties of the alloy are attributed to the combination of the soft FCC matrix and the strengthening of the L12 precipitate.
•A non-equimolar ratio Ni46Co24Fe24Al3Ti3 HEA alloy was designed and fabricated by vacuum suspension melting.•Spherical L12 nano-precipitations precipitates in the equiaxed grain of the as-cast alloy.•Precipitation strengthening is the main strengthening mechanism of the alloy after thermo-mechanical processing.</description><subject>Alloys</subject><subject>Casting alloys</subject><subject>Chemical precipitation</subject><subject>Elongation</subject><subject>Grain boundaries</subject><subject>Heterogeneous precipitation</subject><subject>High entropy alloys</subject><subject>L12 phase</subject><subject>Mechanical properties</subject><subject>Medium entropy alloy</subject><subject>Medium entropy alloys</subject><subject>Precipitates</subject><subject>Precipitation strengthening</subject><subject>Room temperature</subject><subject>Tensile strength</subject><subject>Tensile tests</subject><subject>Thermomechanical treatment</subject><subject>Ultimate tensile strength</subject><subject>Yield strength</subject><subject>Yield stress</subject><issn>0921-5093</issn><issn>1873-4936</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LAzEQxYMoWKtfwFPA89b823QXvJSiVih6qecQs9M2ZTfZJlm14Ic3pZ6FgTm89-YNP4RuKZlQQuX9btJF0BNGGJtQwSSdnqERraa8EDWX52hEakaLktT8El3FuCOEUEHKEfpZQILgN-DADxH3AYztbdLJeodjCuA2aZvFBjvvCtgPViffWYNf7dw_waxdWdxBY4cOg0vB9wes29Yf8JdNWwzfBto2C9ljttpZo9vc4XsIyUK8Rhdr3Ua4-dtj9P70uJoviuXb88t8tiwMZ1UqGCdrUXFWE92waZ5K1pp8QMNrxkumqRFrAMkElUKUYHSjKed1JYBLXcqaj9Hd6W6u3g8Qk9r5IbhcqZgsOeelnLLsYieXCT7GAGvVB9vpcFCUqCNltVNHyupIWZ0o59DDKQT5_08LQUVjwZmMJKNMqvH2v_gvyEOIKA</recordid><startdate>20220217</startdate><enddate>20220217</enddate><creator>Jia, Z.Y.</creator><creator>Zhang, S.Z.</creator><creator>Huo, J.T.</creator><creator>Zhang, C.J.</creator><creator>Zheng, L.W.</creator><creator>Kong, F.T.</creator><creator>Li, H.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20220217</creationdate><title>Heterogeneous precipitation strengthened non-equiatomic NiCoFeAlTi medium entropy alloy with excellent mechanical properties</title><author>Jia, Z.Y. ; Zhang, S.Z. ; Huo, J.T. ; Zhang, C.J. ; Zheng, L.W. ; Kong, F.T. ; Li, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c328t-230f483290ad27d27869a0bed392352a1c4fee62416445ecada133984e36a5693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Alloys</topic><topic>Casting alloys</topic><topic>Chemical precipitation</topic><topic>Elongation</topic><topic>Grain boundaries</topic><topic>Heterogeneous precipitation</topic><topic>High entropy alloys</topic><topic>L12 phase</topic><topic>Mechanical properties</topic><topic>Medium entropy alloy</topic><topic>Medium entropy alloys</topic><topic>Precipitates</topic><topic>Precipitation strengthening</topic><topic>Room temperature</topic><topic>Tensile strength</topic><topic>Tensile tests</topic><topic>Thermomechanical treatment</topic><topic>Ultimate tensile strength</topic><topic>Yield strength</topic><topic>Yield stress</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jia, Z.Y.</creatorcontrib><creatorcontrib>Zhang, S.Z.</creatorcontrib><creatorcontrib>Huo, J.T.</creatorcontrib><creatorcontrib>Zhang, C.J.</creatorcontrib><creatorcontrib>Zheng, L.W.</creatorcontrib><creatorcontrib>Kong, F.T.</creatorcontrib><creatorcontrib>Li, H.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials science & engineering. A, Structural materials : properties, microstructure and processing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jia, Z.Y.</au><au>Zhang, S.Z.</au><au>Huo, J.T.</au><au>Zhang, C.J.</au><au>Zheng, L.W.</au><au>Kong, F.T.</au><au>Li, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Heterogeneous precipitation strengthened non-equiatomic NiCoFeAlTi medium entropy alloy with excellent mechanical properties</atitle><jtitle>Materials science & engineering. A, Structural materials : properties, microstructure and processing</jtitle><date>2022-02-17</date><risdate>2022</risdate><volume>834</volume><spage>142617</spage><pages>142617-</pages><artnum>142617</artnum><issn>0921-5093</issn><eissn>1873-4936</eissn><abstract>The outstanding strength-ductility combination has always been a challenging problem in the development of metal materials, high entropy alloys/medium entropy alloys (HEAs/MEAs) are considered to be the key material to solve this problem. Here a novel non-equiatomic Ni46Co24Fe24Al3Ti3 MEA with equiaxed grains was prepared by vacuum suspension melting, which consists of FCC matrix and heterogeneous L12 precipitate. In the current work, the different states of the Ni46Co24Fe24Al3Ti3 MEA from as-cast to after thermo-mechanical processing (TMP) were systematically researched. The result shows that the heterogeneous L12 precipitate of the as-cast alloy is composed of cubic precipitates at the grain boundary and spherical precipitates in the grain interior. After TMP, a short-rod L12 precipitated by discontinuous precipitation reaction (DP) at the grain boundary, and a spherical L12 precipitated by continuous precipitation reaction (CP) in the grain interior. Meanwhile, the alloy shows outstanding mechanical properties in the tensile test at room temperature. The ultimate tensile strength of the as-cast alloy is 935 MPa, with an elongation of 32%. The strength of the alloy is further improved after TMP, the yield strength and ultimate tensile strength are respectively 820 MPa and 1236 MPa, with an elongation of 23% retained. Compared with the single-phase NiCoFe MEA, the yield strength and ultimate tensile strength are significantly increased by 310％ and 147％. The excellent mechanical properties of the alloy are attributed to the combination of the soft FCC matrix and the strengthening of the L12 precipitate.
•A non-equimolar ratio Ni46Co24Fe24Al3Ti3 HEA alloy was designed and fabricated by vacuum suspension melting.•Spherical L12 nano-precipitations precipitates in the equiaxed grain of the as-cast alloy.•Precipitation strengthening is the main strengthening mechanism of the alloy after thermo-mechanical processing.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.msea.2022.142617</doi></addata></record> |
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| subjects | Alloys Casting alloys Chemical precipitation Elongation Grain boundaries Heterogeneous precipitation High entropy alloys L12 phase Mechanical properties Medium entropy alloy Medium entropy alloys Precipitates Precipitation strengthening Room temperature Tensile strength Tensile tests Thermomechanical treatment Ultimate tensile strength Yield strength Yield stress |
| title | Heterogeneous precipitation strengthened non-equiatomic NiCoFeAlTi medium entropy alloy with excellent mechanical properties |
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