0.3CoCrFeNi高熵合金進行處理。按相對于激光源的位置，合金組織分為3個部分：內(nèi)部具有細胞狀結(jié)構(gòu)的中心影響區(qū)，具有長條結(jié)構(gòu)的邊緣影響區(qū)，以及未受影響的原始晶粒區(qū)域。由于激光引起的快速熔化和凝固，經(jīng)不同功率處理的樣品截面中均觀察到細胞結(jié)構(gòu)；另外，在激光影響區(qū)邊緣發(fā)現(xiàn)了長條細胞結(jié)構(gòu)。之后，將激光處理的樣品分別在660和800 ℃下退火2 h，可以觀察到沿細胞結(jié)構(gòu)邊界有沉淀相析出。通過硬度測試，表明激光表面處理和后續(xù)熱處理相結(jié)合的方法顯著提升了合金的硬度。"/>

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激光表面處理Al0.3CoCrFeNi高熵合金組織特征
作者:
作者單位:

1.重慶大學 輕合金材料國際合作聯(lián)合實驗室，重慶 400044;2.重慶大學 電子顯微鏡中心，重慶 400044;3.重慶理工大學 材料科學與工程學院，重慶 400045;4.南京工業(yè)大學 先進輕質(zhì)高性能材料研究中心，江蘇 南京 210009

作者簡介:

通訊作者:

中圖分類號:

TG178

基金項目:

the National Natural Science Foundation of China (Grant No. 51421001) and the “111” Project (B16007) by the Ministry of Education and the State Administration of Foreign Experts Affairs of China


Microstructure Characterization of Al0.3CoCrFeNi High-Entropy Alloy with Pulsed Laser Surface Treatment
Author:
Affiliation:

1.International Joint Laboratory for Light Alloys, Chongqing University, Chongqing 400044, China;2.Electron Microscopy Center, Chongqing University, Chongqing 400044, China;3.College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400045, China;4.Key Laboratory for Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China

Fund Project:

National Natural Science Foundation of China (51421001); 111 Project Sponsored by Ministry of Education and State Administration of Foreign Experts Affairs of China (B16007)

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    摘要:

    通過4種不同功率的脈沖激光（150，250，350，450 W）對鑄態(tài)Al0.3CoCrFeNi高熵合金進行處理。按相對于激光源的位置，合金組織分為3個部分：內(nèi)部具有細胞狀結(jié)構(gòu)的中心影響區(qū)，具有長條結(jié)構(gòu)的邊緣影響區(qū)，以及未受影響的原始晶粒區(qū)域。由于激光引起的快速熔化和凝固，經(jīng)不同功率處理的樣品截面中均觀察到細胞結(jié)構(gòu)；另外，在激光影響區(qū)邊緣發(fā)現(xiàn)了長條細胞結(jié)構(gòu)。之后，將激光處理的樣品分別在660和800 ℃下退火2 h，可以觀察到沿細胞結(jié)構(gòu)邊界有沉淀相析出。通過硬度測試，表明激光表面處理和后續(xù)熱處理相結(jié)合的方法顯著提升了合金的硬度。

    Abstract:

    The as-cast Al0.3CoCrFeNi high-entropy alloy (HEA) surface was treated by pulsed laser at four different powers (150, 250, 350, 450 W). According to the positions relative to the laser source, HEA structure could be transformed into three parts: the center of laser-affected zone with the cellular structure, the edge of laser-affected zone with the banded cellular structure along the grain boundary, and the unaffected area with original grains. Attributed to the rapid melting and solidification induced by pulsed laser, the cellular structure can be observed in all specimens processed at different powers. Additionally, the long cellular structures can be observed in the edge of the laser-affected zone. Then the specimens after pulsed laser surface treatment were annealed at 660 and 800 °C for 2 h, which leads to the precipitations along the boundaries of the cellular structure. The hardness test results show that the combined method of pulsed laser surface treatment with heat treatment improves the hardness of Al0.3CoCrFeNi HEA remarkably.

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張金龍,邱日盛,譚希努,張惠,柴林江,畢鳳仙,劉慶.激光表面處理Al0.3CoCrFeNi高熵合金組織特征[J].稀有金屬材料與工程,2022,51(1):30~35.[Zhang Jinlong, Qiu Risheng, Tan Xinu, Zhang Hui, Chai Linjiang, Bi Fengxian, Liu Qing. Microstructure Characterization of Al0.3CoCrFeNi High-Entropy Alloy with Pulsed Laser Surface Treatment[J]. Rare Metal Materials and Engineering,2022,51(1):30~35.]
DOI：10.12442/j. issn.1002-185X.20200862

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  • 收稿日期:2020-11-09
  • 最后修改日期:2021-03-23
  • 錄用日期:2021-04-15
  • 在線發(fā)布日期: 2022-02-04
  • 出版日期: 2022-01-28