Al-10Nb-3Ce-2.5B孕育剂对Zn-Al共析合金显微组织、阻尼和拉伸力学性能的影响

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中文摘要：制备一种新型Al-10Nb-3Ce-2.5B孕育剂,并系统研究其对锌铝共析(ZA22)合金显微组织、阻尼和拉伸力学性能的影响.结果表明,该孕育剂对ZA22合金中的α相具有显著的细化作用(α相最低可被细化至约16 μm),并可使得α相的形貌从粗大枝晶状转变为细小花瓣状.通过边-边匹配晶体学模型(E2EM)建立孕育剂中CeB6和NbB2颗粒与α相之间的位向关系(ORs),并基于该E2EM模型揭示孕育剂对ZA22合金的细化机理.与未细化ZA22合金相比,孕育细化ZA22合金的高温阻尼性能,特别是逆共析转变阻尼峰得到显著提升.此外,孕育细化ZA22合金的室温拉伸力学性能也得到了显著提高,具有最佳细化效果的ZA22合金的抗拉强度和伸长率分别比未细化ZA22合金的高18.56％和119.04％.对相关机理进行了讨论.

外文标题：Effect of Al-10Nb-3Ce-2.5B inoculant on microstructures,damping and tensile mechanical properties of Zn-Al eutectoid alloy

外文摘要：A novel Al-10Nb-3Ce-2.5B inoculant was prepared,and its effect on microstructures,damping and tensile mechanical properties of Zn-Al eutectoid(ZA22)alloy was systematically studied.It was found that the inoculant had an effective refining effect on the α-phase in the ZA22 alloy(α-phase could be refined to 16 μm),and the morphology of the α-phase could also change from coarse dendrite to small petal.Orientation relationships(ORs)between theα-phase and the CeB6 and NbB2 particles in the inoculant were established by the edge-edge matching model(E2EM),and based on the E2EM,the refining mechanism of the inoculant on the ZA22 alloy was revealed.Compared with the uninoculated ZA22 alloy,the high temperature damping of the inoculated ZA22 alloy,especially the damping peak arising from the reverse eutectoid transformation,was significantly improved.Moreover,the room temperature tensile mechanical properties of the inoculated ZA22 alloy were also significantly improved.The tensile strength and elongation of the ZA22 alloy with the best refining effect were 18.56％and 119.04％higher than those of the unrefined ZA22 alloy,respectively.Correlated mechanisms were discussed.

外文关键词：

Zn-Al eutectoid alloyinoculantmicrostructure refinementdampingtensile mechanical property

作者：

张建军、殷福星、余晖、冀璞光、刘力、李玉芳、焦志娴、王清周

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作者单位：

河北工业大学材料科学与工程学院天津市材料层状复合与界面控制技术重点实验室,天津 300130

广东省科学院新材料研究所,广州 510651

关键词：

Zn-Al共析合金孕育剂显微组织细化阻尼拉伸力学性能

基金：

Guangdong Academy of Sciences,ChinaFoundation Strengthening Program,ChinaHebei Province Graduate Innovation Funding Project,China

项目编号：

2021GDASYL-202101020022019-JCJQ-ZD-142-00CXZZBS2022032

出版年：

2024

DOI：

10.1016/S1003-6326(23)66411-8

中国有色金属学报(英文版)

中国有色金属学会

中国有色金属学报(英文版)

CSTPCD

影响因子：1.183

ISSN：1003-6326

年,卷(期)：2024.34(2)