A correlation of eutectic growth mechanism with resultant microhardness enhancement for undercooled Ni-47.7%Mo alloy

X. L. Zhao; J. Chang; P. X. Yan; M. X. Li; B. Wei

doi:10.1016/j.matlet.2022.133483

A correlation of eutectic growth mechanism with resultant microhardness enhancement for undercooled Ni-47.7%Mo alloy

X. L. Zhao, J. Chang, P. X. Yan, M. X. Li, B. Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Liquid Ni-47.7 % Mo alloy was undercooled by 328 K (0.21 T_E) and solidified under microgravity condition to investigate the correlation of microhardness enhancement with eutectic growth mechanism. The microstructural morphology transformed from (Ni) + NiMo lamellar eutectic to a duplex mixture of lamellar and anomalous eutectics, and finally into anomalous eutectic. With the increase of alloy undercooling, the eutectic interphase spacings decreased significantly, leading to a remarkable structural refinement and a conspicuous rise of Vickers hardness. The dependence of microhardness upon eutectic spacing was revealed for lamellar and anomalous eutectics, respectively.

Original language	English
Article number	133483
Journal	Materials Letters
Volume	331
DOIs	https://doi.org/10.1016/j.matlet.2022.133483
State	Published - 15 Jan 2023

Keywords

Eutectic growth
Metals and alloys
Microstructure
Rapid solidification
Vickers hardness

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10.1016/j.matlet.2022.133483

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title = "A correlation of eutectic growth mechanism with resultant microhardness enhancement for undercooled Ni-47.7%Mo alloy",

abstract = "Liquid Ni-47.7 % Mo alloy was undercooled by 328 K (0.21 TE) and solidified under microgravity condition to investigate the correlation of microhardness enhancement with eutectic growth mechanism. The microstructural morphology transformed from (Ni) + NiMo lamellar eutectic to a duplex mixture of lamellar and anomalous eutectics, and finally into anomalous eutectic. With the increase of alloy undercooling, the eutectic interphase spacings decreased significantly, leading to a remarkable structural refinement and a conspicuous rise of Vickers hardness. The dependence of microhardness upon eutectic spacing was revealed for lamellar and anomalous eutectics, respectively.",

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T1 - A correlation of eutectic growth mechanism with resultant microhardness enhancement for undercooled Ni-47.7%Mo alloy

AU - Zhao, X. L.

AU - Chang, J.

AU - Yan, P. X.

AU - Li, M. X.

AU - Wei, B.

PY - 2023/1/15

Y1 - 2023/1/15

N2 - Liquid Ni-47.7 % Mo alloy was undercooled by 328 K (0.21 TE) and solidified under microgravity condition to investigate the correlation of microhardness enhancement with eutectic growth mechanism. The microstructural morphology transformed from (Ni) + NiMo lamellar eutectic to a duplex mixture of lamellar and anomalous eutectics, and finally into anomalous eutectic. With the increase of alloy undercooling, the eutectic interphase spacings decreased significantly, leading to a remarkable structural refinement and a conspicuous rise of Vickers hardness. The dependence of microhardness upon eutectic spacing was revealed for lamellar and anomalous eutectics, respectively.

AB - Liquid Ni-47.7 % Mo alloy was undercooled by 328 K (0.21 TE) and solidified under microgravity condition to investigate the correlation of microhardness enhancement with eutectic growth mechanism. The microstructural morphology transformed from (Ni) + NiMo lamellar eutectic to a duplex mixture of lamellar and anomalous eutectics, and finally into anomalous eutectic. With the increase of alloy undercooling, the eutectic interphase spacings decreased significantly, leading to a remarkable structural refinement and a conspicuous rise of Vickers hardness. The dependence of microhardness upon eutectic spacing was revealed for lamellar and anomalous eutectics, respectively.

KW - Eutectic growth

KW - Metals and alloys

KW - Microstructure

KW - Rapid solidification

KW - Vickers hardness

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DO - 10.1016/j.matlet.2022.133483

M3 - 文章

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VL - 331

JO - Materials Letters

JF - Materials Letters

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ER -

A correlation of eutectic growth mechanism with resultant microhardness enhancement for undercooled Ni-47.7%Mo alloy

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Keywords

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