添加Y元素对Ti-6Al-4V-2Cr-1.5Mo合金组织和力学性能的影响  

Effect of Y Addition on Microstructure and Mechanical Properties of Ti-6Al-4V-2Cr-1.5Mo Alloy

作　　者：李汉 刘凤竹 崔云峰 李士凯 王文焱[2] 谢敬佩[2] 黄文君[2] 刁晓刚 LI Han;LIU Fengzhu;CUI Yunfeng;LI Shikai;WANG Wenyan;XIE Jingpei;HUANG Wenjun;DIAO Xiaogang(Luoyang Ship Material Research Institute,Luoyang 471023,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471000,China;CITIC Heavy Industry Luoyang Heavy Iron Industry Co.,Ltd.,Luoyang 471000,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所,河南洛阳471023 [2]河南科技大学材料科学与工程学院,河南洛阳471000 [3]中信重工洛阳重铸铁业有限责任公司,河南洛阳471000

出　　处：《材料开发与应用》2024年第4期38-44,75,共8页Development and Application of Materials

基　　金：2022年度洛阳市重大科技创新专项(2301012A);2023年度河南省重大科技专项(231100230200)。

摘　　要：通过OM、SEM、XRD和TEM对热处理态Ti-6Al-4V-2Cr-1.5Mo-xY(x=0.1,0.5,1.0,1.5,质量分数)合金的组织和力学性能进行分析,发现添加稀土Y元素后,合金的组织得到了明显的细化,产生的稀土氧化物Y_(2)O_(3)弥散分布在基体中;且当Y元素的添加量为0.5%时,合金的强度、硬度和伸长率最好,性能最优。对热处理态的Ti-6Al-4V-2Cr-1.5Mo-0.5Y进行分析,发现析出相Y_(2)O_(3)与基体α-Ti之间的错配度为0.141 3,属于半共格界面。The microstructures and mechanical properties of Ti-6Al-4V-2Cr-1.5 Mo-xY(x=0.1,0.5,1.0,1.5,mass fraction)alloys are analyzed by means of OM,SEM,XRD,and TEM.It is found out that the microstructures of Ti-6Al-4V-2Cr-1.5 Mo-xY alloys are refined obviously after adding the rare earth Y element,that the Y2O3 phases formed are dispersed in the matrix,and that the mechanical properties of the alloy increase first and then decrease with the increase of the content of rare earth Y.The strength,hardness,elongation and properties of the alloy are the best when the addition of Y element is 0.5%.The mismatch between Y2O3 and the matrixα-Ti of the annealed Ti-6Al-4V-2Cr-1.5 Mo-0.5 Y is 0.1413,which belongs to semi-coherent interface.

关 键 词：Ti-6Al-4V-2Cr-1.5Mo合金 稀土Y元素 力学性能 形核过程 

分 类 号：TG146.23[一般工业技术—材料科学与工程]