锻压技术

热处理对AlFeCrCoNiMo高熵合金微观组织与硬度的影响

英文标题：Influence of heat treatment on microstructure and hardness of high entropy alloy AlFeCrCoNiMo

作者：班煜峰刘贵仲董鑫涛郭景杰

分类号：TG142.1

出版年,卷(期):页码：2017,42(7):136-140

摘要：

利用真空电弧熔炼法制备了AlFeCrCoNiMo高熵合金。用X射线衍射（XRD）、扫描电镜（SEM）、硬度仪，研究了退火对高熵合金的微观组织及硬度的影响。结果表明：铸态以及退火后的合金是树枝晶结构，枝晶间是由Cr9Mo21Ni20和NiCoCr 金属间化合物组成的共晶结构；随着退火温度的升高，FCC相逐渐减少，并会析出新的金属间化合物；合金的微观应力表现出先增大后减少的变化趋势；合金的硬度随着退火温度的升高先升高再降低，合金的应力与硬度的变化趋势一致，当退火温度达到800 ℃时，合金的硬度达到最大。

High entropy alloy AlFeCrCoNiMo was prepared by vacuum arc melting, and the influences of annealing on the microstructure and hardness of high entropy alloys were investigated by X-ray diffraction （XRD）, scanning electron microscopy（SEM） and hardness tester. The results show that the crystal structure of cast alloy and annealed alloy is dendritic structure, which is composed of Cr9Mo21Ni20 and NiCoCr intermetallic compound eutectic structure. The FCC phase decreases gradually and will release new intermetallic compound with the rising of annealing temperature. The microscopic stress of alloy shows a variation trend of increasing first and then decreasing, and its hardness increases first and then decreases with the rising of annealing temperature. The variation trend of stress and hardness of alloy is consistent. The maximum hardness is obtained when the annealing temperature reaches 800 ℃.

基金项目：

国家自然科学基金资助项目（511610065）

作者简介：班煜峰(1989-)，男，硕士研究生，E-mail：1391039362@qq.com；通讯作者: 刘贵仲（1974-），男，博士，副教授，E-mail：lgzlgz@guet.edu.cn

参考文献：

[1]Zhou Y J, Zhang Y, Wang F J, et al. Effect of Cu addition on the microstructure and mechanical properties of AlCoCrFeNiTi0.5 solid-solution alloy[J]. Journal of Alloys and Compounds, 2008, 466(1-2): 201-204.

[2] Fazakas E, Zadorozhnyy V, Varga L K, et al. Experimental and theoretical study of Ti20Zr20Hf20Nb20X20(X=V or Cr) refractory high-entropy alloys[J]. International Journal of Refractory Metals and Hard Materials, 2014, 47: 131-138.

[3] 郝聪敏,刘贵仲,谢红波,等. Cu 对AlFeCrCoTiCux多组元高熵合金组织及其力学性能的影响[J].广西大学学报:自然科学版, 2016,41(3):876-882.

Hao C M, Liu G Z, Xie H B, et al. Effects of Cu addition on the microstructure and mechanical properties of AlFeCrCoTiCux high-entropy alloys [J]. Journal of Guangxi University:Natural Science Edition, 2016, 41(3): 876-882.

[4]Zuo T T, Ren S B, Liaw P K, et al. Processing effects on the magnetic and mechanical properties of FeCoNiAl0.2Si0.2 high entropy alloy[J]. International Journal of Minerals, Metallurgy and Materials, 2013, 20(6): 549-555.

[5]李伟,刘贵仲,郭景杰. AlFeCoNiCrTix高熵合金的组织结构及电化学性能[J].特种铸造及有色合金，2009,29(10):941-944.

Li W，Liu G Z，Guo J J. Microstructure and electrochemical properties of AlFeCoNiCrTix high entropy alloys [J]. Special Casting & Nonferrous Alloys, 2009,29(10):941-944.

[6]Pei Y T，Ocelik V，De Hosson J T M. SiCp/Ti-6A1-4V functionally graded materials produced by laser melt injection[J]. Acta Materialia,2002,50(8):2035-2045.

[7] 皮锦红,杨晓敏.应用前景广阔的高熵合金[J]. 新材料产业, 2009, (9): 71-74.Pi J H, Yang X M. Application prospect of high entropy alloy [J]. Advanced Materials Industry,2009, (9): 71-74.

[8] 谢红波,刘贵仲,郭景杰, 等. 添加Al对AlxFeCrCoCuTi高熵合金组织及高温氧化性能的影响[J]. 稀有金属, 2016, 40(4): 315-321.

Xie H B, Liu G Z, Guo J J, et al. Microstructure and high temperature oxidation properties of AlxFeCrCoCuTi high-entropy alloys with different Al contents[J]. Chinese Journal of Rare Metals, 2016, 40(4): 315-321.

[9] 谢红波,刘贵仲,郭景杰. Mn、V、Mo、Ti、Zr元素对AlFeCrCoCu-X高熵合金组织与高温氧化性能的影响[J].中国有色金属学报，2015, 25 (1):103-110.

Xie H B, Liu G Z, Guo J J. Effect of Mn, V, Mo, Ti, Zr elements on microstructure and high temperature oxidation performance of AlFeCrCoCu-X high-entropy alloys [J]. Chinese Journal of Nonferrous Metals, 2015, 25 (1):103-110.

[10] 郭卫凡.多组元高熵合金的研宄进展[J].金属功能材料,2006,16 (1):49-53.

Guo W F. Advances in multi-component high-entropy alloys [J]. Metal Functional Materials, 2006,16 (1):49-53.

[11] Tong C J，Chen Y L，Yeh J W, et al. Microstructure characterization of AlxCoCrCuFeNi high-entropy alloy system with multiprincipal elements[J]. Metallurgical and Materials Transactions A, 2005, 36 (4): 881-893.

[12]谢红波，刘贵仲，郭景杰,等. Ti对AlFeCrCoCu 高熵合金组织及耐磨性能的影响[J].稀有金属材料与工程, 2016,45(1):145-151.

Xie H B, Liu G Z, Guo J J, et al. Effect of Ti addition on the microstructure and wear properties of AlFeCrCoCu high-entropy alloy [J]. Rare Metal Materials and Engineering, 2016,45(1):145-151.

[13]刘亮,张越,赵作福,等.热处理对CoCrFeNiMo高熵合金组织与硬度的影响[J].金属热处理, 2016,41 (8):29-32.

Liu L, Zhang Y, Zhao Z F ,et al. Effect of heat treatment on microstructure and hardness of CoCrFeNiMo high entropy alloy [J]. Heat Treatment of Metals, 2016,41 (8): 29-32.

[14]崔忠坼，覃耀春.金属学与热处理[M]. 北京：机械工业出版社,2010.

Cui Z X, Qin Y C. Metallurgy and Heat Treatment [M]. Beijing: China Machine Press, 2010.

[15]杨晓宁, 邓伟林, 黄晓波,等.高熵合金制备方法进展[J].热加工工艺,2014,43(22):30-33.

Yang X N, Deng W L, Huang X B, et al. Research on preparation methods of high-entropy alloy [J]. Hot Working Technology, 2014,43(22):30-33.

[16]黄继武，李周.多晶材料X射线衍射[M]. 北京：冶金工业出版社, 2012.

Huang J W, Li Z. X-ray Diffraction of Polycrystalline Materials [M]. Beijing: Metallurgical Industry Press, 2012.

服务与反馈：

【文章下载】【加入收藏】