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填充Co的CoCrCuFeNi高熵合金擴(kuò)散焊接頭的組織和擴(kuò)散機(jī)制
作者:
作者單位:

1.貴州理工學(xué)院 貴州省輕金屬材料制備技術(shù)重點(diǎn)實(shí)驗(yàn)室，貴州 貴陽(yáng) 550003;2.貴州理工學(xué)院 材料與能源工程學(xué)院，貴州 貴陽(yáng) 550003;3.貴州理工學(xué)院 貴州省特種功能材料2011協(xié)同創(chuàng)新中心，貴州 貴陽(yáng) 550003

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基金項(xiàng)目:

國(guó)家自然科學(xué)基金[51964011]；貴州省科技計(jì)劃項(xiàng)目[黔科合基礎(chǔ)-ZK[2022]一般175]；貴州省教育廳青年人才成長(zhǎng)項(xiàng)目[黔教合KY[2022]342]；貴州理工學(xué)院學(xué)術(shù)新苗培養(yǎng)及創(chuàng)新探索項(xiàng)目[GZLGXM-13]；貴州理工學(xué)院高層次人才項(xiàng)目[XJGC20190916]


Microstructure and Diffusion Mechanism of CoCrCuFeNi HEA Joints Diffusion Welded Using Co Filler
Author:
Affiliation:

1.Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003 China;2.Department of Materials & Energy Engineering, Guizhou Institute of Technology, Guiyang 550003, China;3.Special Functional Materials Collaborative Innovation Center of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003, China

Fund Project:

Guizhou Province Science and Technology Planning Project (Qianke He Jichu ZK[2022] Yiban 175); National Natural Science Foundation of China (51964011); Education Department Youth Science and Technology Talent Growth Project of Guizhou Province (Qian Jiao He KY [2022] 342); Special Project for Cultivation and Innovation Exploration of New Academic Talents of Guizhou Institute of Technology (GZLGXM-13); High Level Talent Program of Guizhou Institute of Technology (XJGC20190916); Guzhou Province High Level Innovative Talents (Qianke He Platform and Talent (2022) 011-1); Guzhou Colleges and Universities Process Industry New Process Engineering Research Center (QianJiaoJi (2022)034)

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    摘要:

    在850，950，1050和1100 ℃下，填充Co中間層對(duì)CoCrCuFeNi高熵合金（HEA）進(jìn)行了擴(kuò)散焊接，并對(duì)接頭微觀組織和擴(kuò)散機(jī)制進(jìn)行了分析。結(jié)果表明，在各溫度下接頭均形成了牢固的結(jié)合，接頭無(wú)金屬間化合物生成，高熵合金側(cè)界面周圍殘留部分柯肯達(dá)爾孔。對(duì)Cr、Fe、Cu和Ni在Co填充層中的擴(kuò)散系數(shù)進(jìn)行了計(jì)算，排序如下：Cu>Cr>Fe>Ni。所有元素的擴(kuò)散速度均在相同水平，CoCrCuFeNi高熵合金和Co填充層之間的擴(kuò)散是在空位機(jī)制和晶界擴(kuò)散機(jī)制的共同作用下發(fā)生的。

    Abstract:

    A CoCrCuFeNi high-entropy alloy (HEA) was diffusion welded using a Co filler at 850, 950, 1050, and 1100 °C, and the microstructure and diffusion mechanism of the joints were examined. Results show that firm connections are achieved at each temperature, no intermetallic compound forms in the joints, and some Kirkendall voids are remained on the HEA side around the interface. The diffusion coefficients of Cr, Fe, Ni, and Cu in the Co filler at 850 and 950 °C are calculated, ranked as follows: Cu>Cr>Fe>Ni. The diffusion rates of all elements are at the same level. The diffusion between the CoCrCuFeNi HEA and Co filler occurs under the combined action of the vacancy and grain boundary diffusion mechanisms.

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李娟,羅少敏,趙宏龍,周念,秦慶東.填充Co的CoCrCuFeNi高熵合金擴(kuò)散焊接頭的組織和擴(kuò)散機(jī)制[J].稀有金屬材料與工程,2023,52(4):1176~1183.[Li Juan, Luo Shaomin, Zhao Honglong, Zhou Nian, Qin Qingdong. Microstructure and Diffusion Mechanism of CoCrCuFeNi HEA Joints Diffusion Welded Using Co Filler[J]. Rare Metal Materials and Engineering,2023,52(4):1176~1183.]
DOI：10.12442/j. issn.1002-185X. E20220028

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  • 收稿日期:2022-10-09
  • 最后修改日期:2023-04-04
  • 錄用日期:2023-01-05
  • 在線發(fā)布日期: 2023-04-28
  • 出版日期: 2023-04-25