Investigation on a ramp solution heat treatment for a third generation nickel-based single crystal superalloy

2017 ◽  
Vol 723 ◽  
pp. 922-929 ◽  
Author(s):  
Yanbin Zhang ◽  
Lin Liu ◽  
Taiwen Huang ◽  
Quanzhao Yue ◽  
Dejian Sun ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Single Crystal ◽  
Solution Heat Treatment ◽  
Single Crystal Superalloy ◽  
Third Generation

LCF, HCF and VHCF life sensitivity to solution heat treatment of a third-generation Ni-based single crystal superalloy

2020 ◽  
Vol 130 ◽  
pp. 105247 ◽  
Author(s):  
Luciana Maria Bortoluci Ormastroni ◽  
Lorena Mataveli Suave ◽  
Alice Cervellon ◽  
Patrick Villechaise ◽  
Jonathan Cormier
Keyword(s):  
Heat Treatment ◽  
Single Crystal ◽  
Solution Heat Treatment ◽  
Single Crystal Superalloy ◽  
Third Generation

Microstructures of Low Angle Boundaries of a Third Generation Single Crystal Superalloy DD9

2017 ◽  
Vol 898 ◽  
pp. 413-421
Author(s):  
Wan Peng Yang ◽  
Jia Rong Li ◽  
Shi Zhong Liu ◽  
Jin Qian Zhao ◽  
Zhen Xue Shi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Single Crystal ◽  
Grain Boundaries ◽  
Solution Heat Treatment ◽  
Discrete Distribution ◽  
Single Crystal Superalloy ◽  
Third Generation ◽  
Cast State ◽  
Aging Heat Treatment ◽  
Treatment Processes

The microstructures of low angle boundaries (LABs) of a third generation single crystal superalloy DD9 in as-cast state and after different heat treatment processes were studied by optical microscopy (OM) and field emission scanning electron microscopy (FESEM). The results showed that the as-cast LABs of DD9 alloy consisted of rod-like and bulk γ' phases with γ matrix between them, and there were eutectic γ-γ' precipitating at the LABs, as well as small amounts of discrete distribution of carbides. The γ' phase locateed at the grain boundaries was larger than that distributed on both sides of the grain boundaries. After the solution heat treatment, as-cast eutectic γ-γ' at LABs dissolved completely, and rod-like γ' phase was still found at some LABs. Meanwhile, the LABs were inclined to be straight compared to the as-cast state. The primary aging heat treatment made γ' phase at the LABs dissolved completely, and the secondary aging heat treatment resulted little change in the morphology of the LABs. Thus, the effect of the primary aging heat treatment on the microstructures of the LABs was greater than that of the secondary aging heat treatment.

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