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Effects of Ni and A...
Effects of Ni and Al on precipitation behavior and mechanical properties of precipitation-hardened CoCrFeNi high-entropy alloys
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- Zhang, Fan (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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- He, Junyang (författare)
- Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China.
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- Wu, Yuan (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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- Mao, Huahai, 1971- (författare)
- KTH,Materialvetenskap,Thermocalc Software AB, Rasundavagen 18, SE-16967 Solna, Sweden.
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- Wang, Hui (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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- Liu, Xiongjun (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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- Jiang, Suihe (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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- Nieh, T. G. (författare)
- Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
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- Lu, Zhaoping (författare)
- Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
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Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China. (creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Materials Science & Engineering. - : Elsevier BV. - 0921-5093 .- 1873-4936. ; 839, s. 142879-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Morphology and volume fraction of precipitates are crucial for mechanical properties of precipitation-hardened high-entropy alloys (HEAs). In this study, we systematically examined the effects of Ni and Al on precipitation behavior and mechanical properties of (FeCoCr)(98-x-y) NixTi2Aly (x = 25, 30, 35; y = 4, 6, 8) HEAs. It was found that an increase of Ni and Al can effectively promote the formation of coherent gamma' precipitates, but an incoherent Heusler phase (Ni2AlTi) also inevitably appeared once the Al content exceeds 6%. Both gamma' and the Heusler phases could strengthen the materials, however, since they shared the same constituent elements, the two phases produced synergistic effects. For instance, excessive Heusler phase not only restrains the formation of gamma', but also reduces the ductility. Our analysis indicated that the ratio of Ni over Al played a pivotal role on the Heusler phase formation, and the Heusler phase could be completely eliminated when the Ni/Al ratio is larger than 5. In such a case, the maximum volume fraction of gamma' in (FeCoCr)(57)Ni35Ti2Al6 reaches 33% and the alloy exhibits tensile strength over 1 GPa with a decent ductility of about 35%. Our findings provide a useful guideline for the optimal design of precipitation-hardened HEAs, it also shed light on understanding precipitation behavior in highly concentrated alloys.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- High-entropy alloys
- Precipitation behavior
- Mechanical properties
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- ref (ämneskategori)
- art (ämneskategori)
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Zhang, Fan
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He, Junyang
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Wu, Yuan
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Mao, Huahai, 197 ...
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Wang, Hui
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Liu, Xiongjun
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visa fler...
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Jiang, Suihe
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Nieh, T. G.
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Lu, Zhaoping
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visa färre...
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