Temperature-dependence tensile behavior and deformation mechanism of GH4099 Ni-based superalloy manufactured by laser powder bed fusion (LPBF)

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-12 DOI:10.1016/j.matchar.2025.115528

Zexin Quan , Zhaohui Wang , Qiang Jia , Yishu Wang , Fu Guo

{"title":"Temperature-dependence tensile behavior and deformation mechanism of GH4099 Ni-based superalloy manufactured by laser powder bed fusion (LPBF)","authors":"Zexin Quan , Zhaohui Wang , Qiang Jia , Yishu Wang , Fu Guo","doi":"10.1016/j.matchar.2025.115528","DOIUrl":null,"url":null,"abstract":"<div><div>GH4099 nickel-based superalloy exhibits excellent LPBF compatibility and high-temperature strength-ductility balance, yet its mechanisms for strength and ductility loss at high-temperature remains unclear, hindering its applications. This work investigates the microstructural evolution and tensile behavior of LPBF-fabricated GH4099 at 25 °C, 600 °C, and 900 °C. Results show that high-temperature mechanical degradation is linked to the deformation mechanism transition: dislocation slip dominates at 25 °C and 600 °C, with dislocations shearing of γ’ phases strengthening the alloy. At 900 °C, annealing twinning prevails, which fraction enhanced by increased intragranular carbides, strengthen through dislocation interactions with their low energy boundaries, mitigating properties loss. The LPBFed GH4099 prepared in this work achieves ultimate tensile strength of 1222, 1091, 444 MPa and yield strength of 850, 767443 MPa, respectively at 25, 600 and 900 °C, with elongation of 24.4, 17.4 and 13.8 %. The superior mechanical properties, particularly at 900 °C, outperforming other GH4099 alloys.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"229 ","pages":"Article 115528"},"PeriodicalIF":5.5000,"publicationDate":"2025-09-12","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/S1044580325008174","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

GH4099 nickel-based superalloy exhibits excellent LPBF compatibility and high-temperature strength-ductility balance, yet its mechanisms for strength and ductility loss at high-temperature remains unclear, hindering its applications. This work investigates the microstructural evolution and tensile behavior of LPBF-fabricated GH4099 at 25 °C, 600 °C, and 900 °C. Results show that high-temperature mechanical degradation is linked to the deformation mechanism transition: dislocation slip dominates at 25 °C and 600 °C, with dislocations shearing of γ’ phases strengthening the alloy. At 900 °C, annealing twinning prevails, which fraction enhanced by increased intragranular carbides, strengthen through dislocation interactions with their low energy boundaries, mitigating properties loss. The LPBFed GH4099 prepared in this work achieves ultimate tensile strength of 1222, 1091, 444 MPa and yield strength of 850, 767443 MPa, respectively at 25, 600 and 900 °C, with elongation of 24.4, 17.4 and 13.8 %. The superior mechanical properties, particularly at 900 °C, outperforming other GH4099 alloys.

查看原文本刊更多论文

激光粉末床熔合GH4099镍基高温合金的温度依赖性拉伸行为及变形机理

GH4099镍基高温合金具有良好的LPBF相容性和高温强度-塑性平衡，但其高温强度和塑性损失机制尚不清楚，阻碍了其应用。本工作研究了lpbf制备的GH4099在25 °C， 600 °C和900 °C下的显微组织演变和拉伸行为。结果表明，高温力学退化与变形机制转变有关：在25 °C和600 °C时，位错滑移占主导地位，γ′相的位错剪切强化了合金。在900 °C时，退火孪晶发生，晶内碳化物的增加强化了孪晶的部分，并通过位错与低能边界的相互作用加强，从而减轻了性能损失。制备的LPBFed GH4099在25、600和900 ℃下的极限抗拉强度分别为1222、1091、444 MPa，屈服强度分别为850、767443 MPa，伸长率分别为24.4%、17.4%和13.8% %。优异的机械性能，特别是在900 °C时，优于其他GH4099合金。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

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.