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材料导报  2026, Vol. 40 Issue (1): 25010099-7    https://doi.org/10.11896/cldb.25010099
  金属与金属基复合材料 |
基于Oyane-Sato准则的GH4169合金高温断裂行为研究
易世凤, 陈小敏*
长沙理工大学机械与运载工程学院,长沙 410114
Prediction of High-temperature Tensile Fracture Behavior of GH4169 Alloy Based on the Oyane-Sato Criterion
YI Shifeng, CHEN Xiaomin*
College of Mechanical and Vehicle Engineering, Changsha University of Science and Technology, Changsha 410114, China
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摘要 通过不同的热处理方法获得了具有不同初始δ相含量的GH4169高温合金,利用光学显微镜(OM)和扫描电子显微镜(SEM)讨论了时效工艺对合金微观组织的影响规律。结果表明:随着时效时间的延长,合金中的δ相形态发生了显著变化,δ相从晶界向晶内扩展,并由短棒状转变为长针状。通过对不同初始组织的GH4169合金进行高温拉伸实验,发现合金的伸长率表现出先增加后减少的趋势,而抗拉强度和屈服强度逐渐升高。其中,时效9 h的GH4169表现出最高的抗拉强度和相对较好的断裂延伸率。进一步,针对时效9 h的合金在920～1 010 ℃及应变速率为0.001～0.01 s-1条件下进行了高温拉伸试验,并深入研究了其高温损伤行为。在相同的条件下,应变速率越快,材料的屈服强度越高,而温度越高,材料的屈服强度越低。基于Oyane-Sato损伤准则,构建了合金的高温损伤模型,损伤值的预测结果和实验结果具有较好的一致性,表明所建立的损伤模型能够准确预测GH4169合金的高温断裂损伤行为,研究结果可为优化镍基合金热成形工艺提供可靠的理论依据。
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易世凤
陈小敏
关键词:  GH4169合金  高温拉伸  损伤模型  Oyane-Sato准则    
Abstract: GH4169 superalloy with varying initial δ phases was obtained through different heat treatments, the influence of aging processes on the microstructure of the alloy was investigated using optical microscopy (OM) and scanning electron microscopy (SEM). Results show that as the aging time extends, the morphology of δ phase in the alloy changes significantly, extending from grain boundaries into the grain interior and transforming from a short rod shape to a long needle shape. High-temperature tensile tests were conducted on GH4169 alloys with different initial microstructures, the elongation of the alloy exhibits a trend of increasing first and then decreasing, while the ultimate tensile strength and yield strength gradually increase. Among them, GH4169 aged for 9 hours demonstrates the highest ultimate tensile strength and a relatively good fracture elongation. Furthermore, high-temperature tensile tests were conducted on the alloy aged for 9 hours under conditions of 920 ℃ to 1 010 ℃ and strain rates of 0.001 s-1 to 0.01 s-1, with an in-depth investigation of its high-temperature damage behavior. Under the same conditions, the higher the strain rate, the higher the yield strength of the material, while the higher the temperature, the lower the yield strength. Based on the Oyane-Sato damage criterion, a high-temperature damage model of the alloy was constructed, and the predicted damage values are in good agreement with the experimental results, indicating that the established damage model can accurately predict the high-temperature fracture da-mage behavior of GH4169 alloy. The research findings provide a reliable theoretical basis for optimizing the hot forming process of nickel-based alloys.
Key words:  GH4169 alloy    high-temperature tensile    damage model    Oyane-Sato criterion
出版日期:  2026-01-10      发布日期:  2026-01-09
ZTFLH:  TG132  
基金资助: 国家自然科学基金(52475148)
通讯作者:  * 陈小敏,长沙理工大学机械与运载工程学院副教授、硕士研究生导师,主要研究方向为镍基合金和稀土镁合金的疲劳断裂行为。chenxm0616@csust.edu.cn   
作者简介:  易世凤,现为长沙理工大学机械与运载工程学院硕士研究生,在陈小敏副教授的指导下进行研究。目前主要研究领域为镍基高温合金的断裂机理研究。
引用本文:    
易世凤, 陈小敏. 基于Oyane-Sato准则的GH4169合金高温断裂行为研究[J]. 材料导报, 2026, 40(1): 25010099-7.
YI Shifeng, CHEN Xiaomin. Prediction of High-temperature Tensile Fracture Behavior of GH4169 Alloy Based on the Oyane-Sato Criterion. Materials Reports, 2026, 40(1): 25010099-7.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.25010099  或          https://www.mater-rep.com/CN/Y2026/V40/I1/25010099
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