摘要
本文研究了凝固速率对单晶高温合金凝固界面形态、合金元素含量、γ’相及γ／γ’相界面结构的影响。结果表明，随凝固速率的减小，凝固界面从细枝、粗枝向胞状、平面转变，γ’相形成元素挥发严重，弥散分布的γ’相含量减少，γ’相严重合并粗化，γ／γ’相界面失去共格，亚晶界量减少。
The effect of solidification rate on solidification interface morphologies,components,γ' phase and γ/γ'interface structure of a Ni-base single crystal superalloy bas been studied. When the solidfication rate decreases, the liquid/solid interface morphology transforms from the fine dendrittc,the coarse dendritic to the cellular, then the planar, the γ' components lose drastically, the amount of dispersion γ' precipitates decreases,the γ' particles coalesce drastically the γ/γ'interface becomes incoherent and the amount of subgrain boundries decreases.
出处
《材料科学与工程》
CSCD
1995年第1期12-15,共4页
Materials Science and Engineering
关键词
凝固速率
凝固界面形态
单晶
高温合金
合金元素
Solidfication rate, Solidification interface morphology, Single crystal, Superalloy, Component, Microstructure
