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A Si-containing FeC...
A Si-containing FeCoCrNi high-entropy alloy with high strength and ductility synthesized in situ via selective laser melting
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- Lin, Danyang (författare)
- Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China.;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China.
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- Xu, Lianyong (författare)
- Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China.;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China.;Tianjin Univ, State Key Lab Engines, Tianjin 300050, Peoples R China.
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- Li, Xiaojie (författare)
- KTH,Egenskaper
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- Jing, Hongyang (författare)
- Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China.;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China.
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- Qin, Gang (författare)
- KTH,Materialvetenskap
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- Pang, Hongning (författare)
- Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China.;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China.
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- Minami, Fumiyoshi (författare)
- Osaka Univ, Joining & Welding Res Inst, Osaka 5650871, Japan.
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Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China. Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300050, Peoples R China.;Tianjin Key Lab Adv Joining Technol, Tianjin 300050, Peoples R China.;Tianjin Univ, State Key Lab Engines, Tianjin 300050, Peoples R China. (creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
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Ingår i: Additive Manufacturing. - : Elsevier. - 2214-8604 .- 2214-7810. ; 35
- 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
- To widen the applications of new materials in additive manufacturing (AM), the traditional method of printing using pre-alloyed powders should be improved because the pre-alloying process is expensive and makes it difficult to adjust the composition of new materials. This study investigates the synthesis of a FeCoCrNi high-entropy alloy (HEA) containing 1.5 at.% Si in situ using selective laser melting (SLM). A remelting strategy and process optimization based on polynomial regression modeling allowed for the printing of almost fully dense (99.78 %) samples. The samples comprised columnar grains, each containing numerous subgrains of a single-phase face-centered cubic solid solution. No precipitation or segregation were observed. The room temperature tensile properties of the samples were excellent, with yields and tensile strengths reaching 701 +/- 14 and 907 +/- 25 MPa, respectively, and an elongation at fracture of 30.8 +/- 2%. These properties were attributed to solid solution strengthening and novel dislocation loop strengthening mechanism. These findings demonstrate that HEAs with a high relative density and good mechanical properties can be directly synthesized by SLM using inexpensive pure metal powders, thereby extending the application potential of AM to manufacture new materials.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- Dislocation loop
- Solid solution strengthening
- In situ synthesis
- Powder bed fusion
- Mechanical properties
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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