Effect of homogenization heat treatments on the cast structure and tensile properties of nickel-base superalloy ATI 718Plus in the presence of boron and zirconium additions

Hosseini, Seyed Ali; Madar, Karim Zangeneh; Abbasi, S.M.

doi:10.1016/j.msea.2017.02.047

Cited by 21 publications

(6 citation statements)

References 10 publications

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“…The importance of HGT and its significant effect on improving mechanical properties and optimizing the process conditions have attracted many attentions. 25,26)…”

Section: Microstructure and Micro-segregation Behavior Figures 4(a)-4(c)mentioning

confidence: 99%

Solidification Structures of Fe–Cr–Ni–Mo–N Super-austenitic Stainless Steel Processed by Twin-roll Strip Casting and Ingot Casting and Their Segregation Evolution Behaviors

Hao

Cao

et al. 2018

ISIJ Int.

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“…The importance of HGT and its significant effect on improving mechanical properties and optimizing the process conditions have attracted many attentions. 25,26)…”

Section: Microstructure and Micro-segregation Behavior Figures 4(a)-4(c)mentioning

confidence: 99%

Solidification Structures of Fe–Cr–Ni–Mo–N Super-austenitic Stainless Steel Processed by Twin-roll Strip Casting and Ingot Casting and Their Segregation Evolution Behaviors

Hao

Cao

et al. 2018

ISIJ Int.

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“…The volume fraction of γ' phase precipitation is about 52%, and the suitable temperature is above 750℃. Homogenization is the key to eliminate segregation and obtain uniform structure, so as to improve the formability of ingot and facilitate further processing or hot processing [10][11][12][13]. In our previous investigations [14], the new homogenization cycles have been designed, and microstructure evolution has been analyzed on GH4151 alloy.…”

Section: Introductionmentioning

confidence: 99%

Influence of homogenization degree on microstructure and mechanical properties for a novel wrought superalloy

Jia

2023

J. Phys.: Conf. Ser.

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The present work aims at investigating the impact of homogenization time on microstructure and mechanical properties of a Ni-based superalloy GH4151 during hot deformation. The results showed that dense dendrite structure remained after homogenization at 1200°C for 5 h, which was similar to as-cast microstructure. Higher flow stress and cracking in 5 h-homogenized material is attributed to the integral deformation of microstructure with greater resistance and less recrystallization. Furthermore, the decrease in dense dendrite structure with increasing homogenization time helped to promote dynamic recrystallization (DRX) during deformation at 1200°C for 12h and 36 h due to increasing nucleation position. When the homogenization time increased to 60h, increase of grain size makes dislocation gather within grain and resistance increase.

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“…Nickel-based superalloys operate in harsh environments for high temperature and load-bearing applications, and are important materials for manufacturing key components [1][2][3]. At present, advanced aircraft require higher thrust-weight ratio of engine, which puts forward higher requirements for intake temperature and efficiency of turbine [4].GH4151 is a newly developed Ni-base superalloy strengthened by γ 'phase precipitation. Its γ' phase precipitation volume fraction reaches 52% and its service temperature is 750 ℃ or above [5][6], which can meet the above harsh conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of cooling rates on thermoplasticity during hot deformation for a new wrought superalloy

Jia

2023

J. Phys.: Conf. Ser.

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The effect of cooling rate on thermoplasticity of ni base superalloy GH4151 during thermal deformation was studied. Several different treatments were used to obtain γ′ phases of different sizes and shapes. The hot tensile and hot compression tests were carried out, and the microstructure was studied in detail by scanning electron microscopy and transmission electron microscopy to determine the microscopic mechanism. The results show that the volume fraction of large γ’ phase increased with decreasing cooling rate. The slowly cooled material exhibits lower resistance to deformation due to more obvious softening behavior. The sample with slow cooling contains coarse γ′ phase and broaden γ-γ’ channel. The locations around broaden γ-γ’ channel were accumulated during deformation, which caused a high level of stored energy, and thus dynamic recrystallization (DRX) is promoted, and obvious softening behavior was displayed.

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Effect of homogenization heat treatments on the cast structure and tensile properties of nickel-base superalloy ATI 718Plus in the presence of boron and zirconium additions

Cited by 21 publications

References 10 publications

Solidification Structures of Fe–Cr–Ni–Mo–N Super-austenitic Stainless Steel Processed by Twin-roll Strip Casting and Ingot Casting and Their Segregation Evolution Behaviors

Solidification Structures of Fe–Cr–Ni–Mo–N Super-austenitic Stainless Steel Processed by Twin-roll Strip Casting and Ingot Casting and Their Segregation Evolution Behaviors

Influence of homogenization degree on microstructure and mechanical properties for a novel wrought superalloy

Effect of cooling rates on thermoplasticity during hot deformation for a new wrought superalloy

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