摘要
对铸态及经过热等静压和均匀化处理后Ti-Al-Nb-B-W合金的微观组织进行了观察和分析,研究了元素钨对Ti-Al-Nb-B-W合金的铸态及均匀化处理态微观组织的影响。结果发现:随着钨含量的增加,Ti-Al-Nb-B-W合金铸态组织中的非平衡状态加剧,网状组织和胞状组织越来越发达;随着钨含量的增加,Ti-Al-Nb-B-W合金铸态组织中的显微缩松有增多的趋势;在Ti-Al-Nb-B-W合金的均匀化处理过程中发生了非连续粗化,钨不影响γ等轴晶的形核位置与尺寸,但影响其形核率,随着钨含量的增加,γ等轴晶的体积分数有增加的趋势;Ti-Al-Nb-B-W合金经过均匀化处理后,随着钨含量的增加,其片层组织更加完善,片层间距更加细小;Ti-Al-Nb-B-W合金经过均匀化处理后,随着钨含量的增加,β(B2)相析出的量更多。
The microstructures of as-cast and as-annealed Ti-Al-Nb-B-W alloy were observed. The effect of tungsten on microstructures of as-cast and as-annealed Ti-Al-Nb-B-W alloy was investigated. The results show that with increasing content of tungsten, network and cellular structures are more and more obvious; the micro porosity increases. During annealing, the discontinuous coarsening of lamella appears in the alloy, the tungsten does not affect nucleation position and size of equiaxed γ lamella, but increasing the ratio of nucleation which increasing the volume fraction of equiaxed γ amella. After the Ti-Al-Nb-B-W alloy annealed, the lamellar structure grows more perfect and its lamellar space becomes smaller and smaller; and with increasing content of tungsten, the volume fraction of precipitated β （B2） phase increases.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期1199-1203,共5页
Rare Metal Materials and Engineering
