[1]张仰庆,要玉宏,侯永昌.AlxFeCoNi2.05近共晶高熵合金组织和力学性能研究[J].西安工业大学学报,2020,(01):88-94.[doi:10.16185/j.jxatu.edu.cn.2020.01.013 ]
 ZHANG Yangqing,YAO Yuhong,HOU Yongchang.Research on Microstructure and Mechanical Properties of AlxFeCoNi2.05 Near-Eutectic High-Entropy Alloys[J].Journal of Xi'an Technological University,2020,(01):88-94.[doi:10.16185/j.jxatu.edu.cn.2020.01.013 ]
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AlxFeCoNi2.05近共晶高熵合金组织和力学性能研究()
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《西安工业大学学报》[ISSN:1673-9965/CN:61-1458/N]

卷:
期数:
2020年01期
页码:
88-94
栏目:
材料科学与工程
出版日期:
2020-02-15

文章信息/Info

Title:
Research on Microstructure and Mechanical Properties of AlxFeCoNi2.05 Near-Eutectic High-Entropy Alloys
文章编号:
1673-9965(2020)01-0088-07
作者:
张仰庆要玉宏侯永昌
(西安工业大学 材料与化工学院,西安710021
Author(s):
ZHANG YangqingYAO YuhongHOU Yongchang
(School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China)
关键词:
共晶高熵合金 初生相 B2相 L12相 显微组织 力学性能
Keywords:
eutectic high entropy alloys primary phase L12 phase B2 phase microstructure
分类号:
TG113
DOI:
10.16185/j.jxatu.edu.cn.2020.01.013
文献标志码:
A
摘要:
为研究Al元素含量对AlxFeCoNi2.05(x=0.85,0.95,1.05)近共晶高熵合金组织和拉伸性能的影响,通过扫描电子显微镜(SEM)观察合金的显微组织和断口形貌,采用X射线衍射仪(XRD)和透射电子显微镜(TEM)研究Al原子含量对晶体结构的影响。试验结果表明:在该共晶系高熵合金中,Al元素为共晶形成元素。当Al元素含量为0.95时,合金具有由层片状L12相和B2相组成的完全共晶组织,其中富含Fe和Co元素的L12相为领先相,B2相富含Ni和Al元素。当Al元素含量为0.85时,合金组织为L12初生+(L12+B2)共晶组成的亚共晶组织; 当Al元素含量为1.05时,合金组织为B2初生+(L12+B2)共晶组成的过共晶组织。正是由于显微组织的差异,AlxFeCoNi2.05(x=0.85,0.95,1.05)合金的屈服强度由650 MPa降低到450 MPa和510 MPa,而延伸率由12%大幅度增加到29%和27.5%。
Abstract:
The paper studies the effect of Al content on the microstructure and tensile properties of AlxFeCoNi2.05(x=0.85,0.95 and 1.05)near-eutectic high-entropy alloys,the microstructure and fracture morphology of the alloy were observed with a scanning electron microscopy(SEM),the crystal structure was analyzed with an X-ray diffractometer(XRD)and a transmission electron microscope(TEM).Results indicate that Al is an eutectic forming element in the AlFeCoNi2.05 near-eutectic high-entropy alloy.The AlFeCoNi2.05 alloy with 0.95 Al has a completely eutectic structure composed of the leading lamellar L12 phase rich in Fe and Co and B2 phase rich in Ni and Al.The alloys with 0.85 and 1.05 Al respectively has a hypoeutectic structure of primary L12 phase + eutectic(L12+B2)phase and a hypereutectic structure of primary B2 phase + eutectic(L12+B2)phase.Because of difference microstructure,the yield strengths of AlxFeCoNi2.05(x=0.85,0.95,1.05)alloys reduce from 650 MPa to 450 MPa and 510 MPa,while their elongation increases significantly increase from 12% to 29% and 27.5%.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-10-20
基金资助:国家自然基金(51571155); 陕西省教育厅重点实验室基金(17JS054); 陕西省自然科学基础研究计划项目(2017JM5057)。 第一
作者简介:张仰庆(1995-),男,西安工业大学硕士研究生。 通信作者简介:要玉宏(1967-),男,西安工业大学副教授,主要研究方向为高温结构材料,E-mail:yyhong0612@xatu.edu.cn。
(编辑、校对 潘秋岑)
更新日期/Last Update: 2020-02-15