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| Materials development of powder metallurgy valve seat inserts and their failureResearch progress of Al series high-entropy alloy prepared by selective laser
melting |
| WUWenheng，ZHANG Liang，LU Lin |
| Shanghai Engineering Research Center of 3D Printing Materials，Shanghai 200437，China |
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Abstract The high entropy alloy has broken the shackles of the traditional alloy design and become one of the hot
spots in the 21st century due to its excellent properties, among which the Al system high entropy alloy is particularly
outstanding. Selective Laser Melting (SLM) is an additive manufacturing technology for direct manufacturing of
three-dimensional metal parts with complex shapes. There is no need to make molds, and the time for mold design
and manufacturing can be omitted, which greatly reduces the product development cycle, saves development costs,
and is feasible. The economic benefits of the new alloy have unique advantages in tapping the performance and application
potential of new alloys. Inconclusion, the application of SLM technology to the preparation of high-entropy
alloys can be described as a "strong combination". This article will introduce in details the research results of
SLM technology in the preparation of Al series high-entropy alloys in recent years, review the research progress of
the microstructure and performance improvement of Al series high-entropy alloys formed by SLM technique, and
point out the importance and difficulty of the current SLM process of Al series high-entropy alloys. Based on this,
we look forward to the future research, application and development of laser selective melting and forming of highentropy
alloys.
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Received: 12 July 2020
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2021, Vol. 31 
