摘要
采用激光表面快速熔凝技术处理了γ-TiAl基合金的拟连接表面,原位观察了激光处理组织在不同温度下保温过程中组织转变的特点,研究了处理温度对组织转变速度的影响以及组织细化的规律.结果表明,用激光表面快速熔凝处理所得到的γ-TiAl基合金拟连接表面的枝晶组织,在一定的温度下可转变为细小的等轴晶粒组织,为后续的超塑连接提供了良好的保障.
In-situ observation of the transformation of laser surface melted TiAl intermetallic alloy was carried out during the annealing treatment. The effect of temperature on the rate of dendritic structure refinement and the mechanism of refinement were discussed. The results show that the dendritic structure formed by laser surface melting during the annealing treatment will transform into fine-grained structure, which offers a good structural basis to superplastic/diffusion bonding.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第4期385-388,共4页
Chinese Journal of Materials Research
基金
国家自然科学基金资助项目59971004
