Microstructure and stress rupture properties of polycrystal and directionally solidified castings of nickel-based superalloys

Wu, Bao-ping; Li, Linhan; Wu, Jian-tao; Wang, Zhen; Wang, Yanbin; Chen, Xingfu; Dong, Jie; Li, Jun‐Tao

doi:10.1007/s12613-014-0865-1

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…It is common knowledge that directionally solidified components have superior properties. is was further investigated experimentally and confirmed in terms of stress rupture properties, one of the most important properties of Ni-based superalloys, in one study [33]. e study compared the microstructural and stress rupture properties of DS Nisuperalloy castings and polycrystal Ni-superalloy castings.…”

Section: Research Areamentioning

confidence: 99%

“…Single crystal: any study that talks in depth about the single crystal process and the procedure for producing a single crystal structure or its effects and benefits on the final casting [4,17,19,24,26,27,33,38,41,48,49,56,57,62,[72][73][74] 9…”

Section: Research Areamentioning

confidence: 99%

“…Polycrystalline: any study that deals with a superalloy having a polycrystal grain structure [3,5,7,12,33,46,47,53,55,57,67] Comparative studies: any study that has done a comparison on different properties, manufacturing methods, casting conditions, alloys, or any other parameters [1-3, 10, 11, 13, 16, 19-23, 25, 30, 33-36, 39, 45, 47, 52, 53, 57, 66, 74-78] 1 st generation superalloy: any study that has used a 1 st generation superalloy [1, 3, 5-7, 10, 11, 13, 30-35, 40, 42, 43, 49, 79] 2 nd generation superalloy: any study that has used a 2 nd generation superalloy [16, 19, 20, 22, 23, 28, 29, 33, 36-38, 43, 56, 68] 3 rd generation superalloy: any study that has used a 3 rd generation superalloy [8,21,50] 4 th generation superalloy: any study that has used a 4 th generation superalloy [23,51,77] 4…”

Section: Research Areamentioning

confidence: 99%

“…Heat treatment: any study that talks in depth about different heat treatment processes and their effects on the properties of the final casting [10,23,24,33,55,57,66,67,82] Advances in Materials Science and Engineering direction, resulting in a continuous and unbroken crystal lattice. DS is mostly obtained by casting with the assistance of a Bridgman furnace where the movement of the casting from the hot chamber to the cold chamber during solidification promotes grain growth in one direction.…”

Section: Research Areamentioning

confidence: 99%

“…e data regarding this are graphically depicted in Figure 47 Another study [33] discusses about DZ24, a SX Ni-superalloy obtained by modification of polycrystalline K24 superalloy, and the rupture properties of this alloy. K24 is a conventionally cast Ni-superalloy widely regarded for its properties including its tolerance of average temperatures between 900 and 1000 °C.…”

Section: Stress Rupture Properties Of Ni-based Superalloysmentioning

confidence: 99%

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Recent Advancements in the Field of Ni‐Based Superalloys

Selvaraj

Sundaramali

Dev

et al. 2021

Advances in Materials Science and Engineering

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In this review article, research papers related to recent developments in Ni-superalloy technologies have been reviewed in order to provide an insight into recent achievements and the potential for further study, research, and development in this field. In this paper, studies on various aspects of Ni-based superalloys are reviewed, such as production methods, which include widely used casting methods, as well as unconventional alternative procedures, novel techniques, or simulation and prediction of certain alloy casting properties. Reviewing was done by categorising the papers into 4 major categories: manufacturing of Ni-based superalloys, effects of alloying elements, physical and mechanical properties of Ni-based superalloys, and defects in Ni-based superalloys. The process used to make Ni-superalloy parts can have a huge impact on the production process efficiency, the final product’s quality and properties, and the defects formed in it. Investment casting is one of the most common methods for making Ni-superalloy parts. Manufacturing covers studies on various casting methods used to make Ni-based superalloy components, novel techniques and methods developed to improve casting procedures to produce better products, and alternative manufacturing methods like AM and HIP processing. Similar to production process, the role of alloying elements is also very important. Even minor changes in their compositions can cause significant changes in the final product. Simultaneously, these alloying elements appear to be more efficient in the development of new methods to control product quality, suppress defect formation, and improve material properties such as the creep and fatigue. As a result, the effects of various alloying elements used in castings of Ni-based superalloys are thoroughly examined. A material’s properties are its most important components. They assist the industrialist in selecting or developing a material based on the needs of the application/use. With this in mind, many researchers have conducted extensive research on physical and mechanical properties, as well as how to improve them. Fatigue life, stress rupture, creep properties, impact ductility, strain response, stress relaxation behaviour, and so on are some of the most important physical and mechanical properties of Ni-superalloys. This article thoroughly reviews various studies on these properties, how and by what factors they are affected, and how they can be improved. Another important factor to consider when making Ni-superalloy castings is defect formation, which can affect the properties of the final product. Freckle defects, hot tears, porosities, and slivers are some of the major defects that occur in Ni-superalloys during the casting process. This article also reviews in detail about these defects, how they form, and how they affect the final product. These defects were found to have a significant influence on a variety of properties, such as creep, fatigue behaviour, and fracture mechanism. Topics and areas such as reinforcement of Ni-superalloys with the help of CNCs and 3D printing of Ni-superalloys that can provide scope for potential future research are highlighted based on the above-reviewed papers.

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Section: Research Areamentioning

confidence: 99%