Microstructure and Properties of Aluminum-Containing Refractory High-Entropy Alloys
A new metallurgical strategy, high-entropy alloying (HEA), was used to explore new composition and phase spaces in the development of new refractory alloys with reduced densities and improved properties. Combining Mo, Ta, and Hf with “low-density” refractory elements (Nb, V, and Zr) and with Ti and...
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| Veröffentlicht in: | JOM (1989) 2014-10, Vol.66 (10), p.2030-2042 |
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| container_title | JOM (1989) |
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| creator | Senkov, O. N. Woodward, C. Miracle, D. B. |
| description | A new metallurgical strategy, high-entropy alloying (HEA), was used to explore new composition and phase spaces in the development of new refractory alloys with reduced densities and improved properties. Combining Mo, Ta, and Hf with “low-density” refractory elements (Nb, V, and Zr) and with Ti and Al produced six new refractory HEAs with densities ranging from 6.9 g/cm
3
to 9.1 g/cm
3
. Three alloys have single-phase disordered body-centered cubic (bcc) crystal structures and three other alloys contain two bcc nanophases with very close lattice parameters. The alloys have high hardness, in the range from
H
v
= 4.0 GPa to 5.8 GPa, and compression yield strength,
σ
0.2
= 1280 MPa to 2035 MPa, depending on the composition. Some of these refractory HEAs show considerably improved high temperature strengths relative to advanced Ni-based superalloys. Compressive ductility of all the alloys is limited at room temperature, but it improves significantly at 800°C and 1000°C. |
| doi_str_mv | 10.1007/s11837-014-1066-0 |
| format | Article |
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3
to 9.1 g/cm
3
. Three alloys have single-phase disordered body-centered cubic (bcc) crystal structures and three other alloys contain two bcc nanophases with very close lattice parameters. The alloys have high hardness, in the range from
H
v
= 4.0 GPa to 5.8 GPa, and compression yield strength,
σ
0.2
= 1280 MPa to 2035 MPa, depending on the composition. Some of these refractory HEAs show considerably improved high temperature strengths relative to advanced Ni-based superalloys. Compressive ductility of all the alloys is limited at room temperature, but it improves significantly at 800°C and 1000°C.</description><identifier>ISSN: 1047-4838</identifier><identifier>EISSN: 1543-1851</identifier><identifier>DOI: 10.1007/s11837-014-1066-0</identifier><identifier>CODEN: JOMMER</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Alloys ; Aluminous refractories ; Aluminum ; Aluminum alloys ; Aluminum base alloys ; Annealing ; Chemistry/Food Science ; Crystal structure ; Density ; Ductility ; Earth Sciences ; Engineering ; Entropy ; Environment ; Heat treating ; High temperature physics ; Microstructure ; Oxidation ; Parents ; Phase transitions ; Physics ; Refractories ; Studies ; Temperature</subject><ispartof>JOM (1989), 2014-10, Vol.66 (10), p.2030-2042</ispartof><rights>The Minerals, Metals & Materials Society (outside the USA) 2014</rights><rights>Copyright Springer Science & Business Media Oct 2014</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c485t-9ab05983c323eab92998a7eb0642a1f71ddd8eef7eaba5b8ff8018969e9378863</citedby><cites>FETCH-LOGICAL-c485t-9ab05983c323eab92998a7eb0642a1f71ddd8eef7eaba5b8ff8018969e9378863</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11837-014-1066-0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11837-014-1066-0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Senkov, O. N.</creatorcontrib><creatorcontrib>Woodward, C.</creatorcontrib><creatorcontrib>Miracle, D. B.</creatorcontrib><title>Microstructure and Properties of Aluminum-Containing Refractory High-Entropy Alloys</title><title>JOM (1989)</title><addtitle>JOM</addtitle><description>A new metallurgical strategy, high-entropy alloying (HEA), was used to explore new composition and phase spaces in the development of new refractory alloys with reduced densities and improved properties. Combining Mo, Ta, and Hf with “low-density” refractory elements (Nb, V, and Zr) and with Ti and Al produced six new refractory HEAs with densities ranging from 6.9 g/cm
3
to 9.1 g/cm
3
. Three alloys have single-phase disordered body-centered cubic (bcc) crystal structures and three other alloys contain two bcc nanophases with very close lattice parameters. The alloys have high hardness, in the range from
H
v
= 4.0 GPa to 5.8 GPa, and compression yield strength,
σ
0.2
= 1280 MPa to 2035 MPa, depending on the composition. Some of these refractory HEAs show considerably improved high temperature strengths relative to advanced Ni-based superalloys. 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3
to 9.1 g/cm
3
. Three alloys have single-phase disordered body-centered cubic (bcc) crystal structures and three other alloys contain two bcc nanophases with very close lattice parameters. The alloys have high hardness, in the range from
H
v
= 4.0 GPa to 5.8 GPa, and compression yield strength,
σ
0.2
= 1280 MPa to 2035 MPa, depending on the composition. Some of these refractory HEAs show considerably improved high temperature strengths relative to advanced Ni-based superalloys. Compressive ductility of all the alloys is limited at room temperature, but it improves significantly at 800°C and 1000°C.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s11837-014-1066-0</doi><tpages>13</tpages></addata></record> |
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| subjects | Alloys Aluminous refractories Aluminum Aluminum alloys Aluminum base alloys Annealing Chemistry/Food Science Crystal structure Density Ductility Earth Sciences Engineering Entropy Environment Heat treating High temperature physics Microstructure Oxidation Parents Phase transitions Physics Refractories Studies Temperature |
| title | Microstructure and Properties of Aluminum-Containing Refractory High-Entropy Alloys |
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