【作者】 程亮； 李强； 董鲜峰； 李启寿；

【Author】 CHENG Liang;LI Qiang;DONG Xian-feng;LI Qi-shou;Materials Institute,CAEP;

【机构】 中国工程物理研究院材料研究所；

【摘要】 采用真空烧结及热等静压技术,制备了不同钇含量(0%,0.5%,1%,2%)全致密的V-5Cr-5Ti合金。通过金相显微镜、扫描电镜(SEM)和能谱仪(EDS)等手段分析了稀土元素钇对V-5Cr-5Ti合金第二相的影响。结果表明添加钇能有效消除粗大富钛条状第二相,析出富钇颗粒,尺寸约为几微米,分布于晶粒内部和晶界处,以晶粒内部为主,且有细化晶粒的作用,因而能显著改善钒合金微观组织结构。更多还原

【Abstract】 Preparing V-5Cr-5Ti alloy with various yttrium content(0%,0.5%,1%,2%)by hot isostatic pressing and vacuum sintering. In order to analyse the effect of yttrium doping on microstructure of vanadium alloys, optical microscopy(OM),scanning electron microscopy(SEM)and EDS was applied. Results show: rare-earth yttrium can eliminate the strip sharp of the Ti-enriched second phases effectively and produces yttrium-enriched phases, also improve microstructure and have effect on the grain refinement, The size of the yttrium-enriched grain is about several micron. The precipitating Ti-enriched granular distribute inside the grain and on the grain boundary, principally in the grain body.更多还原