多相V-Ti-Ni氢分离合金显微组织与力学性能  

Microstructure and Mechanical Properties of Multiphase V-Ti-Ni Alloys for Hydrogen Separation

作　　者：江鹏[1,2,3] 袁同心 肖思进 黄孝川 王知鸷[1] 丁金慧 蒋金金[1] 孔德军[1] Jiang Peng;Yuan Tongxin;Xiao Sijinl;Huang Xiaochuan;Wang Zhizhi;Ding Jinhui;Jiang Jinjin;Kong Dejun(School of Mechanical Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou University,Changzhou 213164,China;Changzhou High Technology Research Key Laboratory of Mould Advanced Manufacturing,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械工程学院,江苏常州213164 [2]常州大学江苏省绿色过程装备重点实验室,江苏常州213164 [3]常州大学常州市模具先进制造高技术研究重点实验室,江苏常州213164

出　　处：《稀有金属材料与工程》2018年第8期2537-2543,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51705038);江苏省自然科学基金(BK20150268);常州市模具先进制造高技术研究重点实验室项目(CM20173001)

摘　　要：研究了多相V_(100-2x)-Ti_x-Ni_x(x=10,15,20)系列氢分离合金的显微组织、硬度和拉伸性能。V_(100-2x)-Ti_x-Ni_x合金铸锭显微组织均由枝晶相V基固溶体和枝晶间相NiTi和NiTi_2组成。随着合金中Ti和Ni的含量增加,枝晶间相在合金中体积占比增大,形成连续网状,阻止枝晶臂的连接。在室温下,合金整体硬度、抗拉强度、延伸率和断面收缩率均随Ti、Ni含量增加而升高。V基固溶体和NiTi_2相是影响3种合金的整体硬度的主要因素。3种合金在室温下均属于脆性材料。合金中NiTi相含量对合金的延伸率有较大影响。The microstructure, hardness and tensile properties of multiphase V100-2x-Tix-Nix （x=10, 15, 20） alloys for hydrogen separation were investigated. The microstructure of V100-2x-Tix-Nix alloy ingots consists of dendritic phase （V base solid solution） and interdendritic phase （NiTi and NiTi2）. With the increase of the content of Ti and Ni in the alloy, the volume ratio of interdendritic phase in the alloy increases, and blocks the connection of dendrite arm due to forming a continuous network. At room temperature, the bulk hardness, tensile strength, elongation and reduction of area of the alloy increase with the increase of Ti and Ni content. V based solid solution and NiTi2 phase are the main factors affecting the bulk hardness of the three alloys. The three alloys are brittle materials at room temperature. The content of NiTi in the alloy has a great influence on the elongation of the alloy.

关 键 词：V-Ti-Ni多相合金 显微组织 硬度 拉伸性能 

分 类 号：TG146.413[一般工业技术—材料科学与工程]