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A comparative study...
A comparative study on microstructure, nanomechanical and corrosion behaviors of AlCoCuFeNi high entropy alloys fabricated by selective laser melting and laser metal deposition
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- Ren, Yaojia (author)
- Central South University
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- Wu, Hong (author)
- Central South University
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- Liu, Bin (author)
- Central South University
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- Liu, Yong (author)
- Central South University
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- Guo, Sheng, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Jiao, Z. B. (author)
- Hong Kong Polytechnic University
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Baker, Ian (author)
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- English.
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In: Journal of Materials Science and Technology. - : Elsevier BV. - 1005-0302. ; 131, s. 221-230
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Abstract
Subject headings
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- The present study investigated the microstructure, nanomechanics, and corrosion behavior of AlCoCuFeNi high entropy alloys fabricated by selective laser melting (SLM) and laser metal deposition (LMD). The microstructure of SLM-processed specimens was mainly composed of columnar-grained BCC matrix (∼90 µm in width) and Cu-rich twinned FCC phase. The columnar grains grew epitaxially along the building direction and exhibited a strong {001} texture. In comparison, a coarse columnar-grained BCC matrix (∼150 µm in width) with a stronger 〈001〉 texture, rod-like B2 precipitates, and large core-shell structured FCC phases were formed in the LMD-processed specimens due to the higher heat accumulation effect. Consequently, the LMD-processed specimens showed a lower hardness, wear resistance, and corrosion resistance, but higher creep resistance and reduced Young's modulus than the SLM-processed specimens. Hot cracks occurred in both types of specimens, which could not be completely suppressed due to Cu segregation.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Korrosionsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Corrosion Engineering (hsv//eng)
Keyword
- High entropy alloys
- Nanomechanics
- Selective laser melting
- Corrosion
- Laser metal deposition
Publication and Content Type
- art (subject category)
- ref (subject category)
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