添加Mn对Ti-6Al-4V合金组织与性能的影响  

Effect of Mn addition on microstructure and mechanical properties of Ti6Al4V alloy

作　　者：刘冀尧 王文焱[1,2] 黄亚博[1,2] 谢敬佩[1,2] 黄文君[1,2] 史士钦 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《金属热处理》2017年第8期89-92,共4页Heat Treatment of Metals

基　　金：河南省重大科技专项(102105000007)

摘　　要：采用冷等静压法及粉末冶金法制备了钛合金Ti-6Al-4V-x Mn(x=0,1,1.5,2,2.5,wt%),运用精密万能试验机、光学显微镜、XRD、SEM对其组织和性能进行观察和分析。通过观察发现合金的组织为均匀的α+β相,当Mn元素含量为1.5%时,合金的综合力学性能最好。通过对断口进行扫描电镜分析,发现材料的断裂为准解理脆性断裂,但是在断面中发现有少量韧窝。Ti-6Al-4V-xMn（ x = 0,1,1. 5,2,2. 5,wt%） alloy was prepared by cold isostatic pressing and powder metallurgy method,and the microstructure and properties of the alloy were studied by means of universal testing machine,optical microscope,XRD and SEM. The results show that the microstructure of the Ti-6Al-4V-x Mn is composed of homogeneous α ＋ β phases. The best comprehensive mechanical properties of the alloy can be obtained when the Mn content is 1. 5%. Scanning electron microscopy analysis on rupture indicated that the fracture is of feature of quasi-cleavage brittleness,but a small amount of dimple can be found on the fracture.

关 键 词：TI-6AL-4V合金 抗拉强度 伸长率 锰 

分 类 号：TG146.2[一般工业技术—材料科学与工程]