scholarly journals Recrystallization Behavior and Mechanical Properties of Surface-melted Region of Ni-base Single Crystal Superalloy

2008 ◽  
Vol 26 (1) ◽  
pp. 105-110
Author(s):  
Yoshihiro FUJITA ◽  
Kazuyoshi SAIDA ◽  
Kazutoshi NISHIMOTO ◽  
Reki TAKAKU
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Recrystallization Behavior ◽  
Melted Region

Influences of the γ′ Phase on the Mechanical Properties of a Nickel-Based Single Crystal Superalloy

2021 ◽  
Vol 1023 ◽  
pp. 45-52
Author(s):  
Xiao Yan Wang ◽  
Meng Li ◽  
Zhi Xun Wen
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Single Crystal ◽  
Tensile Properties ◽  
Room Temperature ◽  
Solution Treatment ◽  
Single Crystal Superalloy ◽  
Original Material ◽  
Solid Solution Treatment ◽  
The Matrix

After solid solution treatment at 1335°C for 4 hours and cooling to room temperature at different rate, the nickel-based single crystal superalloy were made into three kinds of nickel-based single crystal superalloy materials containing different size γ′ phases, respectively. The tensile test of I-shaped specimens was carried out at 980°C, and their effect of γ′ phase microstructure on the tensile properties was studied. The results show that the yielding strength of the material air-cooled to room temperature was lower than that with cooling rate at 0.15°C/s, but both of them were lower than the yielding strength of original material. Little difference was found on the elastic modulus of I-shaped specimens made of three kinds of materials. When the cubic degree of the γ′ phase is higher and the size is larger, the tensile properties of the material is better, which can be attributed to the larger size and narrower channel of the matrix phase that lead to higher dislocation resistance.

Effects of carburization on recrystallization behavior of a single crystal superalloy

2010 ◽  
Vol 61 (7) ◽  
pp. 749-755 ◽  
Author(s):  
J.C. Xiong ◽  
J.R. Li ◽  
S.Z. Liu ◽  
J.Q. Zhao ◽  
M. Han
Keyword(s):  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Recrystallization Behavior

scholarly journals Analysis of Microstructure in Surface-melted Region of Ni-base Single Crystal Superalloy

2008 ◽  
Vol 26 (1) ◽  
pp. 80-87
Author(s):  
Yoshihiro FUJITA ◽  
Kazuyoshi SAIDA ◽  
Kazutoshi NISHIMOTO ◽  
Toshiaki FUSE
Keyword(s):  
Single Crystal ◽  
Single Crystal Superalloy ◽  
Melted Region

scholarly journals The Effect of the Cooling Rates on the Microstructure and High-Temperature Mechanical Properties of a Nickel-Based Single Crystal Superalloy

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4256
Author(s):  
Xiao-Yan Wang ◽  
Meng Li ◽  
Zhi-Xun Wen
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Single Crystal ◽  
Solution Treatment ◽  
Single Crystal Superalloy ◽  
Air Cooling ◽  
Strengthening Effect ◽  
Cooling Rates ◽  
High Temperature Mechanical Properties ◽  
High Temperature Tensile

The as-cast alloy of nickel-based single-crystal superalloy was used as the research object. After four hours of solution treatment at 1315 °C, four cooling rates (water cooling (WC), air cooling (AC) and furnace cooling (FC1/FC2)) were used to reduce the alloy to room temperature. Four different microstructures of nickel-based superalloy material were prepared. A high-temperature tensile test at 980 °C was carried out to study the influence of various rates on the formation of the material’s microstructure and to further obtain the influence of different microstructures on the high-temperature mechanical properties of the materials. The results show that an increase of cooling rate resulted in a larger γ′ phase nucleation rate, formation of a smaller γ′ phase and a greater number. When air cooling was used, the uniformity of the γ′ phase and the coherence relationship between the γ′ phase and the γ phase were the best. At the same time, the test alloy had the best high-temperature tensile properties, and the material showed a certain degree of plasticity. TEM test results showed that the test alloy mainly blocked dislocations from traveling in the material through the strengthening effect of γ′, and that AC had the strongest hindering effect on γ′ dislocation movement.

Microsegregation Behavior of Single Crystal Superalloy

2014 ◽  
Vol 983 ◽  
pp. 121-126
Author(s):  
Zhu Huan Yu ◽  
Jun Feng Qiang
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Dendrite Core ◽  
Single Crystal Superalloy ◽  
Carbon Addition ◽  
Segregation Behavior ◽  
Carbon Additions

The major advancements in some mechanical properties of single crystal superalloys can be attributed to the carbon addition. The present study investigated the effect of carbon addition levels on the microsegregation behavior of single crystal superalloys. Quantitatative partitioning results indicated that typical single crystal superalloy segregation behavior for some elements such as W, Ni, Co, are all towards the dendrite core regions, while for elements of Al, Mo, Ta, Ti, Cr, partition towards the interdendrite regions. For all the alloys studied, the baseline alloy showed the most severe segregation degree, while the no carbon alloy the slightest. Furthermore, the segregation behavior of Ti and Ta were affected by the carbon additions, and that of W was greatly affected by the carbon levels.

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