摘要
采用粉末冶金法制备了Ti-6Al-4V-1.5Mn-xLa(x=1、1.5、2和2.5,mass%)合金,利用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)和电子万能试验机等研究了合金经固溶时效处理后的微观组织和性能。结果表明:添加稀土元素La后,Ti-6Al-4V-1.5Mn合金的组织出现了明显的细化现象,组织中存在弥散分布的稀土氧化物La_(2)O_(3),对基体起到弥散强化的作用。随稀土元素La含量的增加,合金的抗拉强度和伸长率先增加后降低,当La元素含量为2%时,合金的抗拉强度和伸长率最佳,拉伸断口为准解理断裂。
Ti-6Al-4V-1.5Mn-xLa(x=1,1.5,2 and 2.5,mass%)alloys were prepared by powder metallurgy method,and microstructure and properties of the alloys after solution and aging treatment were studied using optical microscope(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM)and electronic universal testing machine.The results show that after adding rare earth element La,the microstructure of the Ti-6Al-4V-1.5Mn alloy shows significant refinement,and there are dispersed rare earth oxide La_(2)O_(3)in the microstructure,which play a dispersed strengthening role in the matrix.As the content of rare earth element La increases,the tensile strength and elongation of the alloys first increase and then decrease.When the content of La element is 2%,the tensile strength and elongation of the alloy are optimal,and the tensile fracture surface is quasi cleavage fracture.
作者
崔云峰
刘冀尧
王丽娟
刘正红
王文焱
谢敬佩
郭清远
CUI Yun-feng;LIU Ji-yao;WANG Li-juan;LIU Zheng-hong;WANG Wen-yan;XIE Jing-pei;GUO Qing-yuan(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Luoyang Sunrui Wanji Titanium Industry Co Ltd,Luoyang 471832,China;Luoyang Ship Material Research Institute,Luoyang 471027,China;Luoyang Institute of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology,Luoyang 471023,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2024年第10期58-67,共10页
Transactions of Materials and Heat Treatment
基金
河南省科技攻关项目(192102210008)
河南省高等学校重点科研项目(21A430016)
郑洛新国家自主创新示范区创新引领型产业集群专项(201200211000)。
作者简介
崔云峰(1996—),男,硕士研究生,主要从事金属材料研究,E-mail:cuiyf1996@163.com。;通信作者:王文焱(1963—),男,教授,博士,主要从事有色金属材料研究,E-mail:wangwy1963@163.com。
