Detection and Deformation Mechanism of Non-Metallic Inclusions in FGH96 Alloy Isothermal Forging Disk

Wang, Xiao Feng; Zhou, Xiao; Yang, Jie; Zeng, Jin; Wang, Wu Xiang

doi:10.4028/www.scientific.net/msf.747-748.526

Cited by 11 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interface formed by inclusion and FGH96 matrix is an extremely complex material, which is very thin or even has no thickness [ 25 ]. Because of the irregular arrangement of crystals, chemical reactions occurring at the interface during processing, and other reasons, the strength of the inclusion-matrix interface is extremely low, much lower than that of the matrix and inclusion.…”

Section: Finite Element Analysis Of Interface Debonding and Crack Initiation Life Predictionmentioning

confidence: 99%

Low-Cycle Fatigue Crack Initiation Simulation and Life Prediction of Powder Superalloy Considering Inclusion-Matrix Interface Debonding

Zhang

et al. 2021

Materials

View full text Add to dashboard Cite

From the perspective of damage mechanics, the damage parameters were introduced as the characterizing quantity of the decrease in the mechanical properties of powder superalloy material FGH96 under fatigue loading. By deriving a damage evolution equation, a fatigue life prediction model of powder superalloy containing inclusions was constructed based on damage mechanics. The specimens containing elliptical subsurface inclusions and semielliptical surface inclusions were considered. The CONTA172 and TARGE169 elements of finite element software (ANSYS) were used to simulate the interfacial debonding between the inclusions and matrix, and the interface crack initiation life was calculated. Through finite element modeling, the stress field evolution during the interface debonding was traced by simulation. Finally, the effect of the position and shape size of inclusions on interface debonding was explored.

show abstract

Section: Finite Element Analysis Of Interface Debonding and Crack Initiation Life Predictionmentioning

confidence: 99%

Low-Cycle Fatigue Crack Initiation Simulation and Life Prediction of Powder Superalloy Considering Inclusion-Matrix Interface Debonding

Zhang

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…Current literature shows that the types of inclusions in AA and PREP powders can be divided into following three kinds: (i) ceramic and slag inclusions, which mainly come out of master alloy and the process of powder preparation, (ii) organic inclusions, which mainly come out of powder treatment and transportation process, (iii) dissimilar metal inclusions, which mainly come out of high melting point segregations in the master alloy. [7][8][9][10]38] For comparison, the main chemical compositions of the inclusions in AA, PREP, and EIGA powders are listed together in Table 1. It can be seen from Table 1 that the inclusions in EIGA powders mainly belong to dissimilar metal type, and contain certain elements of ceramic inclusions.…”

Section: Inclusions Of Eiga Powdersmentioning

confidence: 99%

“…[6] The mechanical properties of the PM superalloys, especially the low cycle fatigue life (LCF), can be considerably affected by the inclusions. [7][8][9] The sizes of starting powders, in large parts determine the sizes of the inclusions. Therefore, reducing the initial powder size is key to the control of inclusions.…”

Section: Introductionmentioning

confidence: 99%

Innovative technologies for powder metallurgy-based disk superalloys: Progress and proposal

Chen

Yan

2016

Chinese Phys. B

View full text Add to dashboard Cite

Powder metallurgy (PM) superalloys are an important class of high temperature structural materials, key to the rotating components of aero engines. In the purview of the present challenges associated with PM superalloys, two novel approaches namely, powder preparation and the innovative spray-forming technique (for making turbine disk) are proposed and studied. Subsequently, advanced technologies like electrode-induction-melting gas atomization (EIGA), and spark-plasma discharge spheroidization (SPDS) are introduced, for ceramic-free superalloy powders. Presently, new processing routes are sought after for preparing finer and cleaner raw powders for disk superalloys. The progress of research in spray-formed PM superalloys is first summarized in detail. The spray-formed superalloy disks specifically exhibit excellent mechanical properties. This paper reviews the recent progress in innovative technologies for PM superalloys, with an emphasis on new ideas and approaches, central to the innovation driving techniques like powder processing and spray forming.

show abstract

“…In order to achieve surface strengthening, increasing the dislocation density below the metal surface by severe plastic deformation (SPD) is an important means. However, the plastic deformation caused by conventional surface mechanical strengthening techniques, such as extrusion [1,2], burnishing [3][4][5], and shot peening [6][7][8], has a certain limit in enhancing surface properties. The electrically-assisted manufacturing process (EAMP) is a hybrid manufacturing process to improve the metal properties under electric current assistance [9].…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics study on the effect of electric current on electrically-assisted scratching for crystal copper

Yu¹,

Zheng²,

Zhou³

et al. 2022

Phys. Scr.

View full text Add to dashboard Cite

Investigation of the effect of electric current on the plastic deformation mechanism of metals during the electrically-assisted machining process is significant in further improving surface properties. In this paper, the molecular dynamics (MD) method is adopted to simulate the electrically-assisted scratching process of crystal copper, obtaining and analyzing the surface morphology, potential energy change, von Mises stress distribution, and crystal defect structure evolution. The MD simulation results show that the electric current effectively expands the dislocation slip range, resulting in a larger plastic deformation zone. Meanwhile, the combined action of the electron wind forces and Joule heating causes more dislocations to proliferate and increases the dislocation density limit, enhancing the plastic deformation ability of the single-crystal copper. Furthermore, the electric current strengthens the dislocation-grain boundary interactions and reduces the hindering effect of the grain boundaries on dislocations, promoting more dislocations to cross the grain boundaries. This work will be helpful for guiding the optimization of surface strengthening techniques to get better surface properties of metals.

show abstract

Detection and Deformation Mechanism of Non-Metallic Inclusions in FGH96 Alloy Isothermal Forging Disk

Cited by 11 publications

References 4 publications

Low-Cycle Fatigue Crack Initiation Simulation and Life Prediction of Powder Superalloy Considering Inclusion-Matrix Interface Debonding

Low-Cycle Fatigue Crack Initiation Simulation and Life Prediction of Powder Superalloy Considering Inclusion-Matrix Interface Debonding

Innovative technologies for powder metallurgy-based disk superalloys: Progress and proposal

Molecular dynamics study on the effect of electric current on electrically-assisted scratching for crystal copper

Contact Info

Product

Resources

About