Mo对NbCr_2/Nb合金组织及性能影响

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英文篇名：Effect of Mo on Microstructure and Properties of NbCr_2/Nb Alloy 作者：邓莉萍 ; 鲁世强 ; 汤斌兵 ; 雷志立 ; 虞文 英文作者：Deng Liping;Lu Shiqiang;Tang Binbing;Lei Zhili;Yu Wen;Nanchang Hangkong University;Nanjing University of Aeronautics and Astronautics;Nanchang University; 关键词：NbCr_2/Nb合金 ; 合金元素Mo ; 晶体缺陷 ; 性能 英文关键词：NbCr_2/Nb alloy;;alloying element Mo;;crystal defects;;properties 中文刊名：COSE 英文刊名：Rare Metal Materials and Engineering 机构：南昌航空大学;南京航空航天大学;南昌大学; 出版日期：2019-05-15 出版单位：稀有金属材料与工程 年：2019 期：v.48;No.394 基金：国家自然科学基金(51074092);; 江西省自然科学基金(20161BAB206113);; 江西省教育厅落地计划项目(KJLD14056);江西省教育厅科技计划(GJJ160677) 语种：中文; 页：COSE201905017 页数：5 CN：05 ISSN：61-1154/TG 分类号：120-124

摘要

采用机械合金化+热压工艺制备了NbCr_2/Nb-XMo (X=0,2.5,5.0,7.5,10, at%)合金,研究了合金元素Mo对NbCr_2/Nb合金组织及性能的影响。结果表明:合金元素Mo主要存在于Nb基体中,对合金的物相不产生明显影响,合金仍由Nb固溶体和NbCr_2组成;Mo的添加使得NbCr_2/Nb的相界面处应力增加,导致NbCr_2颗粒中的层错/孪晶的密度增加,并促进了Nb基体中位错的运动,从而使得NbCr_2/Nb合金在保持高强度的同时,具有良好的塑性和韧性。
        NbCr_2/Nb-XMo(X=0, 2.5, 5.0, 7.5, 10, at%) alloys were prepared by mechanical alloying and hot pressing. The effects of alloying element Mo on microstructures and properties of the NbCr_2/Nb alloy were studied. The results show that the additions of Mo element do not change the phase components of the NbCr_2/Nb alloy, which are composed of Nb solid solution and NbCr_2. Mo addition can increase the stress at the NbCr_2/Nb phase interfaces, which increases stacking fault/twinning in the NbCr_2 particles and promotes the movement of dislocations in the Nb matrix. The NbCr_2/Nb alloy with an appropriate amount of Mo addition can maintain good plasticity and toughness as well as higher strength.

引文

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