{"title":"The evolution behavior and mechanism of γ' particles during hot deformation in a new P/M nickel-based superalloy","authors":"","doi":"10.1016/j.matchar.2024.114359","DOIUrl":null,"url":null,"abstract":"<div><p>Double-cone (DC) hot compression experiments were carried out for the hot extruded (HEXed) new powder metallurgy (P/M) nickel-based superalloy A1, and the evolution behavior, mechanism of γ' particles in the process of hot deformation of A1 alloy were investigated. The consequences indicate that a rise in strain and strain rate promotes the dissolution of secondary γ' phases (γ'<sub>s</sub>) as well as the dissolution and precipitation of primary γ' phases (γ'<sub>p</sub>), and the deformation temperature mainly promotes the dissolution of γ' particles. The distribution of γ' particles in the deformed and dynamic recrystallized (DRXed) grains is different, and the grain boundary (GB) migration that occurs during DRX leads to the dissolution and reprecipitation of γ' particles at the interface front. Dislocation accumulation leads to the deformation of γ' particles, which are elongated along the vertical strain direction. Some of the γ'<sub>p</sub> split due to the stress concentration brought about by dislocation accumulation and the γ'<sub>s</sub> are sheared by dislocations. The evolution of γ' particles is a diffusion-controlled process, and the GBs and dislocations can be used as an additional diffusion channel for solute elements.</p></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S104458032400740X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
引用次数: 0
Abstract
Double-cone (DC) hot compression experiments were carried out for the hot extruded (HEXed) new powder metallurgy (P/M) nickel-based superalloy A1, and the evolution behavior, mechanism of γ' particles in the process of hot deformation of A1 alloy were investigated. The consequences indicate that a rise in strain and strain rate promotes the dissolution of secondary γ' phases (γ's) as well as the dissolution and precipitation of primary γ' phases (γ'p), and the deformation temperature mainly promotes the dissolution of γ' particles. The distribution of γ' particles in the deformed and dynamic recrystallized (DRXed) grains is different, and the grain boundary (GB) migration that occurs during DRX leads to the dissolution and reprecipitation of γ' particles at the interface front. Dislocation accumulation leads to the deformation of γ' particles, which are elongated along the vertical strain direction. Some of the γ'p split due to the stress concentration brought about by dislocation accumulation and the γ's are sheared by dislocations. The evolution of γ' particles is a diffusion-controlled process, and the GBs and dislocations can be used as an additional diffusion channel for solute elements.
期刊介绍:
Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials.
The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal.
The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include:
Metals & Alloys
Ceramics
Nanomaterials
Biomedical materials
Optical materials
Composites
Natural Materials.