Re和Ta对抗热腐蚀单晶高温合金900 ℃长期时效组织稳定性的影响

黄太文,卢晶,许瑶,王栋,张健,张家晨,张军,刘林

Effects of Rhenium and Tantalum on Microstructural Stability of Hot-Corrosion Resistant Single Crystal Superalloys Aged at 900 ℃

Taiwen HUANG,Jing LU,Yao XU,Dong WANG,Jian ZHANG,Jiachen ZHANG,Jun ZHANG,Lin LIU

表3 5种合金时效过程中枝晶干处γ'相的形貌演化与错配度之间的关系

Table 3 A qualitative listing of the γ' precipitates morphology during LTTE at 900 ℃ and misfit of the five alloys

Alloy γ' precipitates morphology Correlation startup / h Misfit / % 2Ta2Re Nearly cuboidal → nearly round 1000 -0.0113 5Ta0Re Nearly cuboidal → nearly cuboidal - 0.1760 5Ta2Re Cuboidal → nearly cuboidal → nearly round 500 -0.1873 8Ta0Re Cuboidal → nearly cuboidal → nearly round 500 0.2997 8Ta2Re Cuboidal → nearly cuboidal 1000 -0.2666