摘要
通过对Ti-2.5Cu,Ti-3Fe,Ti-3Cr,Ti-13Cu-1Al,Ti-6Al-1.7Fe几种合金铸锭成分的对比研究,建立了典型β钛合金元素的偏析模式。对Ti-2.5Cu,Ti-3Fe,Ti-3Cr合金铸锭的对比可知,Cu和Fe元素的偏析程度大,Cr元素的偏析程度小;对Ti-2.5Cu和Ti-13Cu-1Al合金铸锭的对比可知,Cu元素在2种合金铸锭中的偏析均比较明显,Cu含量越高,偏析程度越大;Cu元素在2种合金铸锭的晶界有截然不同的偏析方式,Cu元素在Ti-13Cu-1Al的晶界富集而在Ti-2.5Cu的晶界贫化。对Ti-3Fe和Ti-6Al-1.7Fe合金铸锭的对比可知,Fe元素在2种合金铸锭中的偏析均比较明显,Fe含量越高,偏析程度越严重;Fe元素在2种合金铸锭的晶界均贫化。
The comparison study and analysis on the ingot compositions of Ti-2.5Cu, Ti-3Fe, Ti-3Cr, Ti-13Cu-lAl, and Ti-6Al-1.7Fe alloys were carried out and the segregation mode of typical β titanium alloying elements was proposed. The composition among Ti-2.5Cu, Ti-3Fe, Ti-3Cr reveals that the segregation of Cu and Fe is obvious and that of Cr is less. The composition study between Ti-2.5Cu and Ti-13Cu-1Al reveals that the segregation of alloying elemental Cu is obvious in the two alloys. The higher the Cu content is, the greater of its segregation. The segregation behavior of Cu on these two alloy's grain boundary is quite different, that is, elemental Cu is rich in the grain boundary of Ti-13Cu-1Al alloy and it is poor in the grain boundary of Ti-2.5Cu alloy. The research on the compositions of Ti-3Fe and Ti-6Al-1.7Fe alloys shows that the segregation of elemental Fe is obvious in these two alloys. The higher the Fe content is, the greater of its segregation. Elemental Fe is poor on their grain boundaries.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第4期531-538,共8页
Rare Metal Materials and Engineering
基金
国家"863"计划项目(2001AA332010)
国家重点自然科学基金项目(50434030)资助
关键词
钛合金
合金元素
偏析
titanium alloy
alloying element
segregation
