文章信息/Info

Title:

Research Progress on Nanoprecipitation-Strengthened High-Entropy Alloys

文章編號(hào):

1674-3962(2025)01-0031-09

作者:

郭嘉鳴; 倪冰雨; 焦增寶

1. 香港理工大學(xué)機(jī)械工程學(xué)系，香港特別行政區(qū) 2. 香港理工大學(xué)深圳研究院，廣東 深圳 518057

Author(s):

GUO Jiaming;  NI Bingyu;  JIAO Zengbao

1 Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China 2 The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057, China

關(guān)鍵詞:

高熵合金; 析出強(qiáng)化; 析出組織; 復(fù)合析出; 力學(xué)性能

Keywords:

high-entropy alloys;  precipitation strengthening;  precipitate microstructure;  co-precipitation;  mechanical properties

分類號(hào):

TG139;TB383

DOI:

10.7502/j.issn.1674-3962.202410004

文獻(xiàn)標(biāo)志碼:

A

摘要:

納米析出強(qiáng)化是提高高熵合金強(qiáng)度的重要方法，理解納米析出相的形成機(jī)理及其對(duì)高熵合金力學(xué)性能的影響機(jī)制，對(duì)設(shè)計(jì)和開發(fā)高性能高熵合金具有重要意義。系統(tǒng)綜述了納米析出強(qiáng)化高熵合金的研究進(jìn)展和未來展望，重點(diǎn)討論了共格析出、非共格析出和復(fù)合析出等不同析出形式對(duì)高熵合金力學(xué)行為和強(qiáng)韌化機(jī)制的影響。共格析出相憑借其與基體良好的晶格匹配性和應(yīng)力傳遞能力，在顯著強(qiáng)化合金的同時(shí)保持了良好的塑性；非共格析出相可顯著增強(qiáng)合金的加工硬化能力，但需要合理調(diào)控其形貌、尺寸和分布，并充分利用高熵合金基體優(yōu)異的塑性和應(yīng)變硬化能力，也可以實(shí)現(xiàn)強(qiáng)韌性的良好匹配；多種納米相的復(fù)合析出可有效發(fā)揮不同析出相的集成優(yōu)勢(shì)，為高熵合金的性能優(yōu)化提供了新思路。需要指出，盡管納米析出強(qiáng)化高熵合金極具應(yīng)用前景，但在熱穩(wěn)定性、高溫性能和工業(yè)化生產(chǎn)成本等方面仍面臨挑戰(zhàn)，需要進(jìn)一步深入研究。對(duì)納米析出強(qiáng)化高熵合金的研究現(xiàn)狀和關(guān)鍵問題進(jìn)行了系統(tǒng)歸納，可為今后設(shè)計(jì)高性能高熵合金提供重要指導(dǎo)依據(jù)。

Abstract:

Precipitation strengthening is considered as an effective approach to enhance the strength of high-entropy alloys (HEAs), and understanding of the precipitation mechanisms and the relationship between precipitate microstructure and mechanical properties is crucial for the development of high-performance HEAs. This article provides a comprehensive review of the research progress and future perspectives on nanoprecipitation-strengthened HEAs, with an emphasis on the influence of various types of precipitation, including coherent precipitation, incoherent precipitation, and co-precipitation, on the mechanical behavior and strengthening mechanisms of HEAs. Coherent precipitates can significantly strengthen the alloys while maintaining good ductility, benefiting from their excellent lattice matching and stress transfer with the matrix. Incoherent precipitates can provide high work hardening, but it is important to reasonably tailor their morphology, size, and distribution, and to fully utilize the excellent ductility and strain hardening capability of the matrix, in order to achieve a good strength-ductility balance in HEAs.Furthermore, the co-precipitation method can take the advantages of various types of precipitates, which opens new opportunities for optimizing mechanical properties of HEAs. Despite the great promise, nanoprecipitation�瞫trengthened HEAs still face challenges in terms of thermal stability, elevated�瞭emperature performance, and cost, which require further research efforts in the future. This review presents the recent advancement and key issues of nanoprecipitation-strengthened HEAs, which can provide useful guidelines for the development of advanced HEAs for technological applications.