Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106723
Title: | Re-precipitation mechanisms of the γ′ phase with sphere, near-sphere, cubic, octets and finally-dendrite in as-cast ni-based superalloys | Authors: | Yu, H Wang, Z Zhang, B Ning, Y Fu, MW |
Issue Date: | 25-Sep-2021 | Source: | Journal of alloys and compounds, 25 Sept. 2021, v. 876, 160104 | Abstract: | The morphology and size distribution of γ′ phases have a significant impact on the thermal processing and manufacturing of components made of superalloys and their service performance under adverse conditions. The homogenization treatment of as-cast superalloys ingot is the first modulation of the morphology, size distribution and other characters of γ′ phase. Therefore, investigation on the re-precipitation mechanism of γ′ phase is of critical theoretical value and engineering significance. In this research, the morphology evolution and size distribution of re-precipitation γ′ phase in an as-cast Ni-based superalloy during homogenizing treatment were investigated extensively and systematically. The re-precipitation mechanism of γ′ phase with sphere, near-sphere, cubic, octets and finally-dendrites was identified under various cooling conditions. The γ′ phase size is increased while the nucleation density is decreased with the cooling conditions changing from air cooling (AC) to furnace cooling (FC). The γ′ phase stability during growth was discussed and the reprecipitation γ′ phase is generated from a refine spherical shape at fast cooling condition (AC); while irregularity growth even splitting happened at slow cooling condition (FC). The findings help understand the re-precipitation mechanism of the γ′ phase of Ni-based superalloys and provide a basis for controlling of the microstructure and tailoring of the properties of the alloys. | Keywords: | Ni-based superalloys Phase stability Re-precipitation mechanism Sphere, near-sphere, cubic, octets and finally dendrites Γ′ phase |
Publisher: | Elsevier | Journal: | Journal of alloys and compounds | ISSN: | 0925-8388 | EISSN: | 1873-4669 | DOI: | 10.1016/j.jallcom.2021.160104 | Rights: | © 2021 Elsevier B.V. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Yu, H., Wang, Z., Zhang, B., Ning, Y., & Fu, M. W. (2021). Re-precipitation mechanisms of the γ′ phase with sphere, near-sphere, cubic, octets and finally-dendrite in as-cast Ni-based superalloys. Journal of Alloys and Compounds, 876, 160104 is available at https://doi.org/10.1016/j.jallcom.2021.160104. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fu_Re-Precipitation_Mechanisms_Phase.pdf | Pre-Published version | 3.72 MB | Adobe PDF | View/Open |
Page views
9
Citations as of Jun 30, 2024
Downloads
3
Citations as of Jun 30, 2024
SCOPUSTM
Citations
27
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
24
Citations as of Jun 27, 2024
![](/image/google_scholar.jpg)
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.