A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys
Recrystallization, possibly triggered during heat treatments by plastic strains of only 1–2%, is highly deleterious to Ni-based single-crystal superalloys. Herein, we successfully recover plastic deformation and enhance the supersolvus critical strain for recrystallization by ramping the annealing t...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/171571 |
| _version_ | 1826120044852019200 |
|---|---|
| author | Lin, Sicong Chen, Kai Zeng, Qiang Ramamurty, Upadrasta |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Lin, Sicong Chen, Kai Zeng, Qiang Ramamurty, Upadrasta |
| author_sort | Lin, Sicong |
| collection | NTU |
| description | Recrystallization, possibly triggered during heat treatments by plastic strains of only 1–2%, is highly deleterious to Ni-based single-crystal superalloys. Herein, we successfully recover plastic deformation and enhance the supersolvus critical strain for recrystallization by ramping the annealing temperature slowly from 1100 °C to γ′-solvus point. This preempts recrystallization during the subsequent supersolvus solutionizing treatment. The proposed method is validated in single-crystals compressed to 5.9% plastic strain at room temperature. After supersolvus solutionizing, an almost dislocation-free single-crystal with uniformly distributed γ′-precipitates is obtained. The proposed method offers a practical means to bring down the overall expenses of single-crystal turbine blades. |
| first_indexed | 2024-10-01T05:09:45Z |
| format | Journal Article |
| id | ntu-10356/171571 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:09:45Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1715712023-11-04T16:48:10Z A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys Lin, Sicong Chen, Kai Zeng, Qiang Ramamurty, Upadrasta School of Mechanical and Aerospace Engineering Institute of Material Research and Engineering, A*STAR Engineering::Materials Recovery Heat Treatment Recrystallization Critical Strain Recrystallization, possibly triggered during heat treatments by plastic strains of only 1–2%, is highly deleterious to Ni-based single-crystal superalloys. Herein, we successfully recover plastic deformation and enhance the supersolvus critical strain for recrystallization by ramping the annealing temperature slowly from 1100 °C to γ′-solvus point. This preempts recrystallization during the subsequent supersolvus solutionizing treatment. The proposed method is validated in single-crystals compressed to 5.9% plastic strain at room temperature. After supersolvus solutionizing, an almost dislocation-free single-crystal with uniformly distributed γ′-precipitates is obtained. The proposed method offers a practical means to bring down the overall expenses of single-crystal turbine blades. Published version This work was supported by National Science and Technology Major Project: [Grant Number 2019-VII-0019-0161]; National Natural Science Foundation of China: [Grant Number 51927801, U2032205, and 52271042]; Outstanding Young Scholar Program: [Grant Number 2020-JCJQ-009]; 111 Project 2.0: [Grant Number BP0618008]. 2023-10-31T02:29:37Z 2023-10-31T02:29:37Z 2023 Journal Article Lin, S., Chen, K., Zeng, Q. & Ramamurty, U. (2023). A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys. Materials Research Letters, 11(10), 856-862. https://dx.doi.org/10.1080/21663831.2023.2253267 2166-3831 https://hdl.handle.net/10356/171571 10.1080/21663831.2023.2253267 2-s2.0-85169664667 10 11 856 862 en Materials Research Letters © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent. application/pdf |
| spellingShingle | Engineering::Materials Recovery Heat Treatment Recrystallization Critical Strain Lin, Sicong Chen, Kai Zeng, Qiang Ramamurty, Upadrasta A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title | A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title_full | A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title_fullStr | A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title_full_unstemmed | A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title_short | A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys |
| title_sort | method for increasing the supersolvus critical strain for recrystallization in single crystal superalloys |
| topic | Engineering::Materials Recovery Heat Treatment Recrystallization Critical Strain |
| url | https://hdl.handle.net/10356/171571 |
| work_keys_str_mv | AT linsicong amethodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT chenkai amethodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT zengqiang amethodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT ramamurtyupadrasta amethodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT linsicong methodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT chenkai methodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT zengqiang methodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys AT ramamurtyupadrasta methodforincreasingthesupersolvuscriticalstrainforrecrystallizationinsinglecrystalsuperalloys |