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Junpin Lin

Bio: Junpin Lin is an academic researcher from University of Science and Technology Beijing. The author has contributed to research in topics: Microstructure & Alloy. The author has an hindex of 26, co-authored 213 publications receiving 3520 citations.


Papers
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TL;DR: In this article, the factors of the atomic size difference Delta and the enthalpy of mixing ΔH mιx of the multi-component alloys were summarized from the literatures.
Abstract: The factors of the atomic size difference Delta and the enthalpy of mixing ΔH mιx of the multi-component alloys were summarized from the literatures. The formation zones of solid-solution phases, intermediate phases, and bulk metallic glasses were determined and the validity was verified by experimental results. For forming the solid solution, the alloys should have high entropy of mixing, lower Delta, and not too negative and positive enthalpy of mixing.

1,936 citations

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TL;DR: In this article, three types of microsegregation were observed in as-cast microstructure of the large ingot: solidification segregation at interdendritic area, β-segregation at boundary and triple junctions among α grain due to the phase transformation of β→α.

197 citations

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TL;DR: In this article, a face-centered-cubic (FCC) CoCrFeNi high-entropy alloy with great ductility was investigated under the cryogenic environment.
Abstract: Seldom could metals and alloys maintain excellent properties in cryogenic condition, such as the ductility, owing to the restrained dislocation motion. However, a face-centered-cubic (FCC) CoCrFeNi high-entropy alloy (HEA) with great ductility is investigated under the cryogenic environment. The tensile strength of this alloy can reach a maximum at 1,251±10 MPa, and the strain to failure can stay at as large as 62% at the liquid helium temperature. We ascribe the high strength and ductility to the low stacking fault energy at extremely low temperatures, which facilitates the activation of deformation twinning. Moreover, the FCC→HCP (hexagonal close-packed) transition and serration lead to the sudden decline of ductility below 77 K. The dynamical modeling and analysis of serrations at 4.2 and 20 K verify the unstable state due to the FCC→HCP transition. The deformation twinning together with phase transformation at liquid helium temperature produces an adequate strain-hardening rate that sustains the stable plastic flow at high stresses, resulting in the serration feature.

114 citations

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TL;DR: In this paper, high temperature tensile and creep behaviors of Tie45Ale9(Nb,W,B,Y) alloy with duplex (DP) microstructure were investigated.

96 citations

Journal ArticleDOI
TL;DR: In this article, the omega phase in as-cast high-Nb-containing TiAl alloy exhibits particles with sizes on the nano- or microscale within the B2 matrix, and the transformation is rapidly initiated, but is difficult to complete.

71 citations


Cited by
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Journal ArticleDOI
TL;DR: High entropy alloys (HEAs) are barely 12 years old as discussed by the authors, and the field has stimulated new ideas and inspired the exploration of the vast composition space offered by multi-principal element alloys.

4,693 citations

Journal ArticleDOI
TL;DR: The concept of high entropy introduces a new path of developing advanced materials with unique properties, which cannot be achieved by the conventional micro-alloying approach based on only one dominant element as mentioned in this paper.

4,394 citations

01 Jun 2005

3,154 citations