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材料导报  2026, Vol. 40 Issue (3): 25010188-9    https://doi.org/10.11896/cldb.25010188
  金属与金属基复合材料 |
等温氧化对GH3230合金拉伸及疲劳性能的影响
王莉莎1,2, 曹睿1,2,*, 张亚玮3,4, 张继4
1 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州 730050
2 兰州理工大学材料科学与工程学院,兰州 730050
3 北京钢研高纳科技股份有限公司,北京 100081
4 钢铁研究总院高温合金新材料北京市重点实验室,北京 100081
Effects of Isothermal Oxidation on the Tensile and Fatigue Properties of GH3230 Alloy
WANG Lisha1,2, CAO Rui1,2,*, ZHANG Yawei3,4, ZHANG Ji4
1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology, Lanzhou 730050, China
2 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
3 Beijing CISRI-Gaona Materials Technology Co.,Ltd., Beijing 100081, China
4 Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China
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摘要 首先对GH3230合金进行1 000 ℃/100 h的等温氧化实验,然后进行了室温及700 ℃的拉伸试验和低周疲劳试验,获得了GH3230合金的S-N曲线,并对断口进行了分析。结果表明:等温氧化后形成的致密氧化层对GH3230合金起到了保护作用,对拉伸性能影响较小,但是对疲劳性能影响显著,使室温低周疲劳寿命升高、高温低周疲劳寿命显著降低。拉伸断口分布着大量韧窝,表明其为韧性断裂。高温拉伸试样的韧窝较大而深,与塑性较高这一特性一致。疲劳断口整体分为裂纹萌生区、扩展区与瞬断区,其中裂纹萌生区分为表面沿层起裂和脆性碳化物起裂。疲劳断裂为脆性断裂,室温疲劳试样边缘无明显裂纹,塑性滑移带明显,说明位错运动是主要的塑性变形机制。氧化试样的氧化层致密而完整,碳化物增多且弥散分布,使其疲劳寿命更高。700 ℃高温疲劳试样边缘产生多条次生裂纹,其裂纹扩展模式为沿晶-穿晶的混合模式。没有观察到塑性滑移带,表明变形机制由位错滑移转为扩散蠕变或晶界滑移,氧化试样的氧化层破裂剥落,部分碳化物粗化聚集,使疲劳寿命降低。
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王莉莎
曹睿
张亚玮
张继
关键词:  低周疲劳  GH3230镍基高温合金  等温氧化  氧化层  疲劳断裂机理    
Abstract: Isothermal oxidation tests at 1 000 ℃ for 100 hours were conducted on GH3230 alloy, followed by tensile tests and low-cycle fatigue (LCF) tests at both room temperature and 700 ℃. The S-N curves of GH3230 alloy were established, and fracture surface analyses were performed. Results indicate that the dense oxide layer formed during isothermal oxidation provides effective protection for the alloy, exhibiting minimal impact on tensile properties but significantly influencing fatigue performance. Notably, it enhances room-temperature LCF life while significantly reducing high-temperature LCF life. Tensile fracture surfaces display abundant dimples, confirming ductile fracture characteristics. Larger and deeper dimples observed in high-temperature tensile specimens align with their superior plasticity. Fatigue fractures demonstrate three distinct zones:crack initiation, propagation, and final rupture. Crack initiation mechanisms involve surface layer-induced fracture and brittle carbide-induced cracking. Fatigue failure manifests as brittle fracture, with room-temperature specimens showing no edge cracks but prominent plastic slip bands, suggesting dislocation motion as the dominant deformation mechanism. Oxidized specimens exhibit intact oxide layers and increased dispersion of carbides, contributing to improved fatigue resistance. In contrast, 700 ℃ LCF specimens develop multiple secondary cracks at edges, displaying intergranular-transgranular mixed-mode propagation. The absence of plastic slip bands implies a transition in deformation mechanisms from dislocation glide to diffusion creep or grain boundary sliding. Degraded fatigue life in oxidized high-temperature specimens correlates with oxide layer spallation and carbide coarsening.
Key words:  low-cycle fatigue    GH3230 nickel-based superalloy    isothermal oxidation    oxide layer    fatigue fracture mechanism
发布日期:  2026-02-13
ZTFLH:  TG14  
基金资助: 中央引导地方科技发展专项(24ZYQA054);甘肃省拔尖领军人才项目;甘肃省科技重大专项(23ZDGA010);甘肃省重点研发计划(23YFGA0057);国家自然科学基金(52175325;51961024;52071170)
通讯作者:  *曹睿,博士,兰州理工大学材料科学与工程学院教授、博士研究生导师。主要从事新材料、异种材料的焊接性、强韧性、疲劳、损伤及断裂行为等方面的研究。   
作者简介:  王莉莎,兰州理工大学材料科学与工程学院硕士研究生,在曹睿教授的指导下研究镍基合金的氧化以及疲劳与断裂。
引用本文:    
王莉莎, 曹睿, 张亚玮, 张继. 等温氧化对GH3230合金拉伸及疲劳性能的影响[J]. 材料导报, 2026, 40(3): 25010188-9.
WANG Lisha, CAO Rui, ZHANG Yawei, ZHANG Ji. Effects of Isothermal Oxidation on the Tensile and Fatigue Properties of GH3230 Alloy. Materials Reports, 2026, 40(3): 25010188-9.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.25010188  或          https://www.mater-rep.com/CN/Y2026/V40/I3/25010188
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