Effect of hot rolling on microstructures and mechanical properties of Ni base superalloy

Raza, Syed Shehzad; Ahmad, Tahir; Kamran, Muhammad; Zhang, Xuehui; Basit, Muhammad Abdul; Manzoor, Muhammad Umar; Inam, Aqil; Butt, Osama Majeed; Abrar, Muhammad

doi:10.1016/j.vacuum.2020.109204

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Doping of many elements also changed the phase transition path of NiTi alloy; for example, the doping of the Fe element caused the appearance of the R phase [ 38 ], and the doping of the Cu element caused the appearance of the B19 phase (martensite phase, rhomboidal structure) [ 39 ]. Nb, Fe, Co, Cr, V, Mn, A1 [ 40 , 41 ], and other elements reduced the martensitic phase transition point of NiTi alloy, while Pt, Pd, Hf, Ta, Zr, Au, Cu [ 42 , 43 , 44 ], and other elements increased it.…”

Section: Sma Characteristics and Typesmentioning

confidence: 99%

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Xu,

Zhu,

Zhao

et al. 2024

Materials

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Shape memory alloy (SMA), a type of smart material, is widely used in the design of reinforcement and repair, isolation, and shock absorption of building structures because of its outstanding characteristics, such as the shape memory effect (SME), superelasticity (SE), and high damping. It not only improves the bearing capacity, ductility, and mechanical properties of the structural components of buildings but can also effectively slow down the strong response of engineering structures under the effect of an earthquake. It plays a key role in energy dissipation and shock absorption as well as sustainable development. To promote the application of SMA in building structures, this paper summarizes the research on the use of SMA as a reinforcing material in building structures, including work related to SMA material characteristics and types, SMA-reinforced structural components, and SMA isolation devices. In addition, the shortcomings of SMA applications in building structures are analyzed, and valuable suggestions for future research methods are put forward. SMA has been applied to engineering practice in the form of embedded and external reinforcement, which shows that it has broad application prospects in future buildings.

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Section: Sma Characteristics and Typesmentioning

confidence: 99%

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Xu,

Zhu,

Zhao

et al. 2024

Materials

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“…Hence, GH4169 superalloy is commonly utilized in the production of critical components in the energy and aerospace industries, such as casings and turbine discs [5][6][7][8]. In general, hot deformation, such as die forging and rolling, is the main way to manufacture these components [9][10][11]. Therefore, the flow behavior of the GH4169 superalloy during hot deformation has drawn the attention of several academics.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Chen,

Cai,

Lin

et al. 2024

Materials

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Typically, in the manufacturing of GH4169 superalloy forgings, the multi-process hot forming that consists of pre-deformation, heat treatment and final deformation is required. This study focuses on the microstructural evolution throughout hot working processes. Considering that δ phase can promote nucleation and limit the growth of grains, a process route was designed, including pre-deformation, aging treatment (AT) to precipitate sufficient δ phases, high temperature holding (HTH) to uniformly heat the forging, and final deformation. The results show that the uneven strain distribution after pre-deformation has a significant impact on the subsequent refinement of the grain microstructure due to the complex coupling relationship between the evolution of the δ phase and recrystallization behavior. After the final deformation, the fine-grain microstructure with short rod-like δ phases as boundaries is easy to form in the region with a large strain of the pre-forging. However, necklace-like mixed grain microstructure is formed in the region with a small strain of the pre-forging. In addition, when the microstructure before final deformation consists of mixed grains, dynamic recrystallization (DRX) nucleation behavior preferentially depends on kernel average misorientation (KAM) values. A large KAM can promote the formation of DRX nuclei. When the KAM values are close, a smaller average grain size of mixed-grain microstructure is more conductive to promote the DRX nucleation. Finally, the interaction mechanisms between δ phase and DRX nucleation are revealed.

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“…In addition, a large number of holes can be produced by laser drilling in a non-contact manner (as opposed to conventional drilling methods). However, the process also has certain defects associated with the resulting drilled hole geometry [ 25 , 26 ] and material microstructure [ 17 , 27 , 28 , 29 , 30 , 31 , 32 ]. These are mainly heat affected areas, recast layers and microcracks in the base material, which are considered to be undesirable effects.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Drilling of Inconel 718 and Its Effect on Mechanical Properties Determined by Static Uniaxial Tensile Testing at Room and Elevated Temperatures

2021

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Particularly in the aerospace industry and its applications, recast layers and microcracks in base materials are considered to be undesirable side effects of the laser beam machining process, and can have a significant influence on the resulting material behavior and its properties. The paper deals with the evaluation of the affected areas of the Inconel 718 nickel-base superalloy after its drilling by a laser beam. In addition, measurements and analyses of the mechanical properties were performed to investigate how these material properties were affected. It is supposed that the mechanical properties of the base material will be negatively affected by this accompanying machining process phenomenon. As a verification method of the final mechanical properties of the material, static uniaxial tension tests were performed on experimental flat shape samples made of the same material (Inconel 718) and three different thicknesses (0.5/1.0/1.6 mm) which best represented the practical needs of aerospace sheet metal applications. There was one hole that was drilled with an angle of under 70° in the middle of the sample length. Additionally, there were several sets of samples for each material thickness that were drilled by both conventional and nonconventional methods to emphasize the effect of the recast layer on the base material. In total, 192 samples were evaluated within the experiment. Moreover, different tensile testing temperatures (room as 23 °C and elevated as 550 °C) were determined for all the circumstances of the individual experiments to simulate real operation load material behavior. As a result, the dependencies between the amount of the recast layer and the length of the microcracks observed after the material was machined by laser beam, and the decrease in the mechanical properties of the base material, were determined.

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Effect of hot rolling on microstructures and mechanical properties of Ni base superalloy

Cited by 7 publications

References 18 publications

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

The Utilization of Shape Memory Alloy as a Reinforcing Material in Building Structures: A Review

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Laser Beam Drilling of Inconel 718 and Its Effect on Mechanical Properties Determined by Static Uniaxial Tensile Testing at Room and Elevated Temperatures

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